./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe008_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe008_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe008_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe008_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 00:14:09,244 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 00:14:09,300 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 00:14:09,305 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 00:14:09,305 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 00:14:09,327 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 00:14:09,328 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 00:14:09,328 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 00:14:09,328 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 00:14:09,328 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 00:14:09,329 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 00:14:09,329 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 00:14:09,329 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 00:14:09,330 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 00:14:09,330 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 00:14:09,330 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 00:14:09,330 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 00:14:09,330 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 00:14:09,331 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 00:14:09,331 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 00:14:09,331 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 00:14:09,332 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 00:14:09,333 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 00:14:09,333 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 00:14:09,333 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 00:14:09,333 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 00:14:09,333 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 00:14:09,334 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 00:14:09,334 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 00:14:09,334 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 00:14:09,334 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 00:14:09,334 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 00:14:09,335 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:14:09,335 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 00:14:09,335 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 00:14:09,335 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 00:14:09,335 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 00:14:09,335 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 00:14:09,336 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 00:14:09,336 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 00:14:09,336 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 00:14:09,338 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 00:14:09,338 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 00:14:09,338 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 00:14:09,563 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 00:14:09,585 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 00:14:09,587 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 00:14:09,588 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 00:14:09,588 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 00:14:09,589 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe008_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-28 00:14:10,533 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 00:14:10,761 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 00:14:10,763 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe008_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-28 00:14:10,777 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2469850a7/70d48e9c314540d1a9dba4b2c43219bd/FLAGe2e21b158 [2024-06-28 00:14:10,790 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2469850a7/70d48e9c314540d1a9dba4b2c43219bd [2024-06-28 00:14:10,791 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 00:14:10,792 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 00:14:10,792 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe008_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-28 00:14:10,870 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 00:14:10,871 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 00:14:10,880 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 00:14:10,880 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 00:14:10,884 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 00:14:10,885 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:14:10" (1/2) ... [2024-06-28 00:14:10,886 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f0e3b56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:14:10, skipping insertion in model container [2024-06-28 00:14:10,886 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:14:10" (1/2) ... [2024-06-28 00:14:10,888 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5e7758e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:14:10, skipping insertion in model container [2024-06-28 00:14:10,888 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:14:10" (2/2) ... [2024-06-28 00:14:10,888 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f0e3b56 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:14:10, skipping insertion in model container [2024-06-28 00:14:10,889 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:14:10" (2/2) ... [2024-06-28 00:14:10,889 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 00:14:10,913 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 00:14:10,914 INFO L97 edCorrectnessWitness]: Location invariant before [L826-L826] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL) && (0LL - (long long )z$flush_delayed) + (long long )z$r_buff0_thd1 >= 0LL) && (0LL - (long long )z$flush_delayed) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$flush_delayed) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff0_thd0) + (long long )z$r_buff0_thd1 >= 0LL) && (0LL - (long long )z$r_buff0_thd0) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd0) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff0_thd2) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd2) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff0_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd3) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff1_thd0) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd0) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff1_thd2) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd2) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$read_delayed) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$read_delayed) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$r_buff0_thd1) + (long long )z$w_buff0 >= 0LL) && (1LL - (long long )z$r_buff0_thd1) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$r_buff1_thd1) + (long long )z$w_buff0 >= 0LL) && (1LL - (long long )z$r_buff1_thd1) + (long long )z$w_buff0_used >= 0LL) && (2LL - (long long )z$w_buff0) + (long long )z$w_buff0_used >= 0LL) && (long long )__unbuffered_cnt + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_cnt + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_cnt + (long long )z$w_buff0_used >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z$w_buff0_used >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z$w_buff0_used >= 0LL) && (long long )main$tmp_guard1 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )main$tmp_guard1 + (long long )z$w_buff0 >= 0LL) && (long long )main$tmp_guard1 + (long long )z$w_buff0_used >= 0LL) && (long long )x + (long long )z$r_buff0_thd1 >= 0LL) && (long long )x + (long long )z$w_buff0 >= 0LL) && (long long )x + (long long )z$w_buff0_used >= 0LL) && (long long )y + (long long )z$r_buff0_thd1 >= 0LL) && (long long )y + (long long )z$w_buff0 >= 0LL) && (long long )y + (long long )z$w_buff0_used >= 0LL) && (long long )z + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z + (long long )z$w_buff0 >= 0LL) && (long long )z + (long long )z$w_buff0_used >= 0LL) && (long long )z$flush_delayed + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z$flush_delayed + (long long )z$w_buff0 >= 0LL) && (long long )z$flush_delayed + (long long )z$w_buff0_used >= 0LL) && (long long )z$mem_tmp + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z$mem_tmp + (long long )z$w_buff0 >= 0LL) && (long long )z$mem_tmp + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd0 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z$r_buff0_thd0 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd0 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff0_thd2 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff0_thd3 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd0 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd1 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd2 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd3 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$read_delayed >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff1 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff1_used >= 0LL) && (long long )z$r_buff0_thd2 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd2 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd3 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd3 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd0 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd0 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd1 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd1 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd2 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd2 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd3 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd3 + (long long )z$w_buff0_used >= 0LL) && (long long )z$read_delayed + (long long )z$w_buff0 >= 0LL) && (long long )z$read_delayed + (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 + (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 + (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0 + (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff0_used + (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0_used + (long long )z$w_buff1_used >= 0LL) && (long long )weak$$choice0 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )weak$$choice0 + (long long )z$w_buff0 >= 0LL) && (long long )weak$$choice0 + (long long )z$w_buff0_used >= 0LL) && (long long )weak$$choice2 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )weak$$choice2 + (long long )z$w_buff0 >= 0LL) && (long long )weak$$choice2 + (long long )z$w_buff0_used >= 0LL) && (1LL + (long long )z$r_buff0_thd1) - (long long )z$w_buff0 >= 0LL) && (1LL + (long long )z$r_buff0_thd1) - (long long )z$w_buff1 >= 0LL) && (1LL + (long long )z$r_buff1_thd1) - (long long )z$w_buff1 >= 0LL) && (1LL + (long long )z$w_buff0) - (long long )z$w_buff0_used >= 0LL) && (1LL + (long long )z$w_buff0) - (long long )z$w_buff1_used >= 0LL) && (2LL + (long long )z$w_buff0_used) - (long long )z$w_buff1 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff0_thd2 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff0_thd3 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd0 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd1 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd2 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd3 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$read_delayed >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$w_buff1_used >= 0LL) && (long long )z$r_buff1_thd1 - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0_used - (long long )z$w_buff1_used >= 0LL) [2024-06-28 00:14:10,915 INFO L97 edCorrectnessWitness]: Location invariant before [L823-L823] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL) && (0LL - (long long )z$flush_delayed) + (long long )z$r_buff0_thd1 >= 0LL) && (0LL - (long long )z$flush_delayed) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$flush_delayed) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff0_thd0) + (long long )z$r_buff0_thd1 >= 0LL) && (0LL - (long long )z$r_buff0_thd0) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd0) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff0_thd2) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd2) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff0_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd3) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff1_thd0) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd0) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff1_thd2) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd2) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$read_delayed) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$read_delayed) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$r_buff0_thd1) + (long long )z$w_buff0 >= 0LL) && (1LL - (long long )z$r_buff0_thd1) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$r_buff1_thd1) + (long long )z$w_buff0 >= 0LL) && (1LL - (long long )z$r_buff1_thd1) + (long long )z$w_buff0_used >= 0LL) && (2LL - (long long )z$w_buff0) + (long long )z$w_buff0_used >= 0LL) && (long long )__unbuffered_cnt + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_cnt + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_cnt + (long long )z$w_buff0_used >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z$w_buff0_used >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z$w_buff0_used >= 0LL) && (long long )main$tmp_guard1 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )main$tmp_guard1 + (long long )z$w_buff0 >= 0LL) && (long long )main$tmp_guard1 + (long long )z$w_buff0_used >= 0LL) && (long long )x + (long long )z$r_buff0_thd1 >= 0LL) && (long long )x + (long long )z$w_buff0 >= 0LL) && (long long )x + (long long )z$w_buff0_used >= 0LL) && (long long )y + (long long )z$r_buff0_thd1 >= 0LL) && (long long )y + (long long )z$w_buff0 >= 0LL) && (long long )y + (long long )z$w_buff0_used >= 0LL) && (long long )z + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z + (long long )z$w_buff0 >= 0LL) && (long long )z + (long long )z$w_buff0_used >= 0LL) && (long long )z$flush_delayed + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z$flush_delayed + (long long )z$w_buff0 >= 0LL) && (long long )z$flush_delayed + (long long )z$w_buff0_used >= 0LL) && (long long )z$mem_tmp + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z$mem_tmp + (long long )z$w_buff0 >= 0LL) && (long long )z$mem_tmp + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd0 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z$r_buff0_thd0 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd0 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff0_thd2 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff0_thd3 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd0 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd1 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd2 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd3 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$read_delayed >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff1 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff1_used >= 0LL) && (long long )z$r_buff0_thd2 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd2 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd3 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd3 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd0 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd0 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd1 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd1 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd2 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd2 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd3 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd3 + (long long )z$w_buff0_used >= 0LL) && (long long )z$read_delayed + (long long )z$w_buff0 >= 0LL) && (long long )z$read_delayed + (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 + (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 + (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0 + (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff0_used + (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0_used + (long long )z$w_buff1_used >= 0LL) && (long long )weak$$choice0 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )weak$$choice0 + (long long )z$w_buff0 >= 0LL) && (long long )weak$$choice0 + (long long )z$w_buff0_used >= 0LL) && (long long )weak$$choice2 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )weak$$choice2 + (long long )z$w_buff0 >= 0LL) && (long long )weak$$choice2 + (long long )z$w_buff0_used >= 0LL) && (1LL + (long long )z$r_buff0_thd1) - (long long )z$w_buff0 >= 0LL) && (1LL + (long long )z$r_buff0_thd1) - (long long )z$w_buff1 >= 0LL) && (1LL + (long long )z$r_buff1_thd1) - (long long )z$w_buff1 >= 0LL) && (1LL + (long long )z$w_buff0) - (long long )z$w_buff0_used >= 0LL) && (1LL + (long long )z$w_buff0) - (long long )z$w_buff1_used >= 0LL) && (2LL + (long long )z$w_buff0_used) - (long long )z$w_buff1 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff0_thd2 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff0_thd3 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd0 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd1 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd2 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd3 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$read_delayed >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$w_buff1_used >= 0LL) && (long long )z$r_buff1_thd1 - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0_used - (long long )z$w_buff1_used >= 0LL) [2024-06-28 00:14:10,915 INFO L97 edCorrectnessWitness]: Location invariant before [L825-L825] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL) && (0LL - (long long )z$flush_delayed) + (long long )z$r_buff0_thd1 >= 0LL) && (0LL - (long long )z$flush_delayed) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$flush_delayed) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff0_thd0) + (long long )z$r_buff0_thd1 >= 0LL) && (0LL - (long long )z$r_buff0_thd0) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd0) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff0_thd2) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd2) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff0_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd3) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff1_thd0) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd0) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff1_thd2) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd2) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$read_delayed) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$read_delayed) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$r_buff0_thd1) + (long long )z$w_buff0 >= 0LL) && (1LL - (long long )z$r_buff0_thd1) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$r_buff1_thd1) + (long long )z$w_buff0 >= 0LL) && (1LL - (long long )z$r_buff1_thd1) + (long long )z$w_buff0_used >= 0LL) && (2LL - (long long )z$w_buff0) + (long long )z$w_buff0_used >= 0LL) && (long long )__unbuffered_cnt + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_cnt + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_cnt + (long long )z$w_buff0_used >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z$w_buff0_used >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z$w_buff0_used >= 0LL) && (long long )main$tmp_guard1 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )main$tmp_guard1 + (long long )z$w_buff0 >= 0LL) && (long long )main$tmp_guard1 + (long long )z$w_buff0_used >= 0LL) && (long long )x + (long long )z$r_buff0_thd1 >= 0LL) && (long long )x + (long long )z$w_buff0 >= 0LL) && (long long )x + (long long )z$w_buff0_used >= 0LL) && (long long )y + (long long )z$r_buff0_thd1 >= 0LL) && (long long )y + (long long )z$w_buff0 >= 0LL) && (long long )y + (long long )z$w_buff0_used >= 0LL) && (long long )z + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z + (long long )z$w_buff0 >= 0LL) && (long long )z + (long long )z$w_buff0_used >= 0LL) && (long long )z$flush_delayed + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z$flush_delayed + (long long )z$w_buff0 >= 0LL) && (long long )z$flush_delayed + (long long )z$w_buff0_used >= 0LL) && (long long )z$mem_tmp + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z$mem_tmp + (long long )z$w_buff0 >= 0LL) && (long long )z$mem_tmp + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd0 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z$r_buff0_thd0 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd0 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff0_thd2 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff0_thd3 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd0 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd1 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd2 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd3 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$read_delayed >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff1 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff1_used >= 0LL) && (long long )z$r_buff0_thd2 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd2 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd3 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd3 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd0 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd0 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd1 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd1 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd2 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd2 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd3 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd3 + (long long )z$w_buff0_used >= 0LL) && (long long )z$read_delayed + (long long )z$w_buff0 >= 0LL) && (long long )z$read_delayed + (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 + (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 + (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0 + (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff0_used + (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0_used + (long long )z$w_buff1_used >= 0LL) && (long long )weak$$choice0 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )weak$$choice0 + (long long )z$w_buff0 >= 0LL) && (long long )weak$$choice0 + (long long )z$w_buff0_used >= 0LL) && (long long )weak$$choice2 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )weak$$choice2 + (long long )z$w_buff0 >= 0LL) && (long long )weak$$choice2 + (long long )z$w_buff0_used >= 0LL) && (1LL + (long long )z$r_buff0_thd1) - (long long )z$w_buff0 >= 0LL) && (1LL + (long long )z$r_buff0_thd1) - (long long )z$w_buff1 >= 0LL) && (1LL + (long long )z$r_buff1_thd1) - (long long )z$w_buff1 >= 0LL) && (1LL + (long long )z$w_buff0) - (long long )z$w_buff0_used >= 0LL) && (1LL + (long long )z$w_buff0) - (long long )z$w_buff1_used >= 0LL) && (2LL + (long long )z$w_buff0_used) - (long long )z$w_buff1 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff0_thd2 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff0_thd3 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd0 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd1 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd2 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd3 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$read_delayed >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$w_buff1_used >= 0LL) && (long long )z$r_buff1_thd1 - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0_used - (long long )z$w_buff1_used >= 0LL) [2024-06-28 00:14:10,915 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 00:14:10,915 INFO L106 edCorrectnessWitness]: ghost_update [L821-L821] multithreaded = 1; [2024-06-28 00:14:10,948 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 00:14:11,310 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:14:11,329 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 00:14:11,525 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:14:11,555 INFO L206 MainTranslator]: Completed translation [2024-06-28 00:14:11,556 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:14:11 WrapperNode [2024-06-28 00:14:11,556 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 00:14:11,557 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 00:14:11,557 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 00:14:11,557 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 00:14:11,562 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:14:11" (1/1) ... [2024-06-28 00:14:11,589 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:14:11" (1/1) ... [2024-06-28 00:14:11,639 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 144 [2024-06-28 00:14:11,640 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 00:14:11,640 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 00:14:11,640 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 00:14:11,640 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 00:14:11,648 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:14:11" (1/1) ... [2024-06-28 00:14:11,648 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:14:11" (1/1) ... [2024-06-28 00:14:11,661 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:14:11" (1/1) ... [2024-06-28 00:14:11,692 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]. [2024-06-28 00:14:11,692 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:14:11" (1/1) ... [2024-06-28 00:14:11,692 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:14:11" (1/1) ... [2024-06-28 00:14:11,709 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:14:11" (1/1) ... [2024-06-28 00:14:11,711 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:14:11" (1/1) ... [2024-06-28 00:14:11,718 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:14:11" (1/1) ... [2024-06-28 00:14:11,720 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:14:11" (1/1) ... [2024-06-28 00:14:11,728 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 00:14:11,729 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 00:14:11,729 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 00:14:11,729 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 00:14:11,730 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:14:11" (1/1) ... [2024-06-28 00:14:11,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:14:11,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:14:11,756 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) [2024-06-28 00:14:11,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-28 00:14:11,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 00:14:11,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 00:14:11,791 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 00:14:11,791 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 00:14:11,792 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 00:14:11,792 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 00:14:11,792 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 00:14:11,792 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 00:14:11,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 00:14:11,792 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 00:14:11,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 00:14:11,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 00:14:11,794 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 00:14:11,914 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 00:14:11,916 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 00:14:12,433 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 00:14:12,435 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 00:14:12,627 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 00:14:12,627 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 00:14:12,628 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:14:12 BoogieIcfgContainer [2024-06-28 00:14:12,628 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 00:14:12,630 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 00:14:12,630 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 00:14:12,633 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 00:14:12,633 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 12:14:10" (1/4) ... [2024-06-28 00:14:12,634 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f8d3050 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 12:14:12, skipping insertion in model container [2024-06-28 00:14:12,634 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:14:10" (2/4) ... [2024-06-28 00:14:12,634 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f8d3050 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:14:12, skipping insertion in model container [2024-06-28 00:14:12,635 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:14:11" (3/4) ... [2024-06-28 00:14:12,636 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f8d3050 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:14:12, skipping insertion in model container [2024-06-28 00:14:12,636 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:14:12" (4/4) ... [2024-06-28 00:14:12,637 INFO L112 eAbstractionObserver]: Analyzing ICFG safe008_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-28 00:14:12,651 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 00:14:12,652 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 00:14:12,652 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 00:14:12,705 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 00:14:12,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-28 00:14:12,762 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-28 00:14:12,763 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:14:12,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 00:14:12,764 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-28 00:14:12,767 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-28 00:14:12,778 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 00:14:12,785 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;@3361617c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 00:14:12,785 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 00:14:12,790 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 00:14:12,790 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 00:14:12,791 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:14:12,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:14:12,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 00:14:12,792 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)] === [2024-06-28 00:14:12,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:14:12,799 INFO L85 PathProgramCache]: Analyzing trace with hash 371187043, now seen corresponding path program 1 times [2024-06-28 00:14:12,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:14:12,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310762127] [2024-06-28 00:14:12,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:14:12,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:14:12,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:14:14,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:14:14,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:14:14,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310762127] [2024-06-28 00:14:14,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310762127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:14:14,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:14:14,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 00:14:14,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108350950] [2024-06-28 00:14:14,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:14:14,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 00:14:14,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:14:14,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 00:14:14,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 00:14:14,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-28 00:14:14,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:14:14,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:14:14,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-28 00:14:14,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:14:14,491 INFO L124 PetriNetUnfolderBase]: 1156/1754 cut-off events. [2024-06-28 00:14:14,491 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-06-28 00:14:14,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3581 conditions, 1754 events. 1156/1754 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 7996 event pairs, 805 based on Foata normal form. 1/1718 useless extension candidates. Maximal degree in co-relation 3569. Up to 1740 conditions per place. [2024-06-28 00:14:14,505 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 31 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-28 00:14:14,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 167 flow [2024-06-28 00:14:14,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 00:14:14,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 00:14:14,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-28 00:14:14,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-06-28 00:14:14,516 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 71 transitions. [2024-06-28 00:14:14,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 167 flow [2024-06-28 00:14:14,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 162 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 00:14:14,521 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-28 00:14:14,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-28 00:14:14,525 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-28 00:14:14,525 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-28 00:14:14,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:14:14,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:14:14,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:14:14,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 00:14:14,526 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)] === [2024-06-28 00:14:14,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:14:14,527 INFO L85 PathProgramCache]: Analyzing trace with hash 229573720, now seen corresponding path program 1 times [2024-06-28 00:14:14,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:14:14,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069068976] [2024-06-28 00:14:14,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:14:14,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:14:14,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:14:15,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:14:15,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:14:15,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069068976] [2024-06-28 00:14:15,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069068976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:14:15,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:14:15,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 00:14:15,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965836412] [2024-06-28 00:14:15,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:14:15,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:14:15,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:14:15,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:14:15,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:14:15,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-28 00:14:15,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:14:15,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:14:15,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-28 00:14:15,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:14:15,782 INFO L124 PetriNetUnfolderBase]: 1150/1745 cut-off events. [2024-06-28 00:14:15,783 INFO L125 PetriNetUnfolderBase]: For 327/334 co-relation queries the response was YES. [2024-06-28 00:14:15,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4052 conditions, 1745 events. 1150/1745 cut-off events. For 327/334 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 7836 event pairs, 699 based on Foata normal form. 7/1749 useless extension candidates. Maximal degree in co-relation 4040. Up to 1716 conditions per place. [2024-06-28 00:14:15,792 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 38 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2024-06-28 00:14:15,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 234 flow [2024-06-28 00:14:15,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:14:15,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:14:15,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-28 00:14:15,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-28 00:14:15,796 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 92 transitions. [2024-06-28 00:14:15,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 234 flow [2024-06-28 00:14:15,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 51 transitions, 230 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 00:14:15,798 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 134 flow [2024-06-28 00:14:15,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-28 00:14:15,798 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2024-06-28 00:14:15,799 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 134 flow [2024-06-28 00:14:15,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:14:15,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:14:15,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:14:15,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 00:14:15,799 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)] === [2024-06-28 00:14:15,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:14:15,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1473147828, now seen corresponding path program 1 times [2024-06-28 00:14:15,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:14:15,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973305036] [2024-06-28 00:14:15,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:14:15,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:14:15,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:14:16,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:14:16,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:14:16,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973305036] [2024-06-28 00:14:16,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973305036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:14:16,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:14:16,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:14:16,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45766861] [2024-06-28 00:14:16,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:14:16,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:14:16,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:14:16,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:14:16,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:14:16,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-28 00:14:16,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:14:16,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:14:16,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-28 00:14:16,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:14:17,097 INFO L124 PetriNetUnfolderBase]: 1385/2086 cut-off events. [2024-06-28 00:14:17,097 INFO L125 PetriNetUnfolderBase]: For 1057/1065 co-relation queries the response was YES. [2024-06-28 00:14:17,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5365 conditions, 2086 events. 1385/2086 cut-off events. For 1057/1065 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9393 event pairs, 709 based on Foata normal form. 9/2093 useless extension candidates. Maximal degree in co-relation 5351. Up to 2043 conditions per place. [2024-06-28 00:14:17,109 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 52 selfloop transitions, 10 changer transitions 0/67 dead transitions. [2024-06-28 00:14:17,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 67 transitions, 351 flow [2024-06-28 00:14:17,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:14:17,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:14:17,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2024-06-28 00:14:17,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.545 [2024-06-28 00:14:17,115 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 134 flow. Second operand 5 states and 109 transitions. [2024-06-28 00:14:17,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 67 transitions, 351 flow [2024-06-28 00:14:17,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 67 transitions, 330 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-28 00:14:17,118 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 204 flow [2024-06-28 00:14:17,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=204, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2024-06-28 00:14:17,120 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2024-06-28 00:14:17,120 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 204 flow [2024-06-28 00:14:17,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:14:17,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:14:17,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:14:17,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 00:14:17,121 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)] === [2024-06-28 00:14:17,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:14:17,121 INFO L85 PathProgramCache]: Analyzing trace with hash 551950753, now seen corresponding path program 1 times [2024-06-28 00:14:17,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:14:17,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555525529] [2024-06-28 00:14:17,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:14:17,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:14:17,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:14:18,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:14:18,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:14:18,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555525529] [2024-06-28 00:14:18,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555525529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:14:18,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:14:18,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:14:18,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909221299] [2024-06-28 00:14:18,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:14:18,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:14:18,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:14:18,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:14:18,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:14:18,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-28 00:14:18,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 204 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:14:18,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:14:18,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-28 00:14:18,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:14:18,730 INFO L124 PetriNetUnfolderBase]: 1393/2097 cut-off events. [2024-06-28 00:14:18,730 INFO L125 PetriNetUnfolderBase]: For 1918/1937 co-relation queries the response was YES. [2024-06-28 00:14:18,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5948 conditions, 2097 events. 1393/2097 cut-off events. For 1918/1937 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9430 event pairs, 583 based on Foata normal form. 17/2112 useless extension candidates. Maximal degree in co-relation 5931. Up to 1989 conditions per place. [2024-06-28 00:14:18,740 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 69 selfloop transitions, 20 changer transitions 0/94 dead transitions. [2024-06-28 00:14:18,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 94 transitions, 532 flow [2024-06-28 00:14:18,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:14:18,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:14:18,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-28 00:14:18,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-28 00:14:18,743 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 204 flow. Second operand 6 states and 140 transitions. [2024-06-28 00:14:18,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 94 transitions, 532 flow [2024-06-28 00:14:18,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 94 transitions, 528 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-28 00:14:18,750 INFO L231 Difference]: Finished difference. Result has 58 places, 59 transitions, 332 flow [2024-06-28 00:14:18,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=332, PETRI_PLACES=58, PETRI_TRANSITIONS=59} [2024-06-28 00:14:18,751 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 17 predicate places. [2024-06-28 00:14:18,751 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 59 transitions, 332 flow [2024-06-28 00:14:18,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:14:18,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:14:18,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:14:18,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 00:14:18,752 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)] === [2024-06-28 00:14:18,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:14:18,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1644192203, now seen corresponding path program 1 times [2024-06-28 00:14:18,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:14:18,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87313283] [2024-06-28 00:14:18,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:14:18,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:14:18,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:14:19,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:14:19,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:14:19,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87313283] [2024-06-28 00:14:19,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87313283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:14:19,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:14:19,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:14:19,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773123173] [2024-06-28 00:14:19,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:14:19,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:14:19,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:14:19,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:14:19,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:14:20,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-28 00:14:20,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 59 transitions, 332 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:14:20,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:14:20,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-28 00:14:20,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:14:20,523 INFO L124 PetriNetUnfolderBase]: 1433/2161 cut-off events. [2024-06-28 00:14:20,523 INFO L125 PetriNetUnfolderBase]: For 3759/3778 co-relation queries the response was YES. [2024-06-28 00:14:20,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7197 conditions, 2161 events. 1433/2161 cut-off events. For 3759/3778 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 9827 event pairs, 449 based on Foata normal form. 28/2187 useless extension candidates. Maximal degree in co-relation 7174. Up to 1965 conditions per place. [2024-06-28 00:14:20,535 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 77 selfloop transitions, 22 changer transitions 0/104 dead transitions. [2024-06-28 00:14:20,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 104 transitions, 670 flow [2024-06-28 00:14:20,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:14:20,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:14:20,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-28 00:14:20,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-28 00:14:20,537 INFO L175 Difference]: Start difference. First operand has 58 places, 59 transitions, 332 flow. Second operand 7 states and 160 transitions. [2024-06-28 00:14:20,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 104 transitions, 670 flow [2024-06-28 00:14:20,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 104 transitions, 658 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-28 00:14:20,541 INFO L231 Difference]: Finished difference. Result has 64 places, 60 transitions, 382 flow [2024-06-28 00:14:20,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=382, PETRI_PLACES=64, PETRI_TRANSITIONS=60} [2024-06-28 00:14:20,541 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 23 predicate places. [2024-06-28 00:14:20,542 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 60 transitions, 382 flow [2024-06-28 00:14:20,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:14:20,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:14:20,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:14:20,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 00:14:20,542 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)] === [2024-06-28 00:14:20,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:14:20,543 INFO L85 PathProgramCache]: Analyzing trace with hash -889132349, now seen corresponding path program 1 times [2024-06-28 00:14:20,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:14:20,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119355133] [2024-06-28 00:14:20,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:14:20,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:14:20,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:14:22,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:14:22,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:14:22,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119355133] [2024-06-28 00:14:22,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119355133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:14:22,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:14:22,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:14:22,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635771571] [2024-06-28 00:14:22,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:14:22,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:14:22,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:14:22,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:14:22,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:14:22,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:14:22,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 60 transitions, 382 flow. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:14:22,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:14:22,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:14:22,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:14:22,776 INFO L124 PetriNetUnfolderBase]: 1652/2488 cut-off events. [2024-06-28 00:14:22,777 INFO L125 PetriNetUnfolderBase]: For 5849/5849 co-relation queries the response was YES. [2024-06-28 00:14:22,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8605 conditions, 2488 events. 1652/2488 cut-off events. For 5849/5849 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11524 event pairs, 949 based on Foata normal form. 4/2489 useless extension candidates. Maximal degree in co-relation 8578. Up to 2436 conditions per place. [2024-06-28 00:14:22,794 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 67 selfloop transitions, 11 changer transitions 0/81 dead transitions. [2024-06-28 00:14:22,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 81 transitions, 634 flow [2024-06-28 00:14:22,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:14:22,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:14:22,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-06-28 00:14:22,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42 [2024-06-28 00:14:22,795 INFO L175 Difference]: Start difference. First operand has 64 places, 60 transitions, 382 flow. Second operand 5 states and 84 transitions. [2024-06-28 00:14:22,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 81 transitions, 634 flow [2024-06-28 00:14:22,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 81 transitions, 582 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-28 00:14:22,801 INFO L231 Difference]: Finished difference. Result has 66 places, 69 transitions, 444 flow [2024-06-28 00:14:22,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=444, PETRI_PLACES=66, PETRI_TRANSITIONS=69} [2024-06-28 00:14:22,804 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 25 predicate places. [2024-06-28 00:14:22,804 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 69 transitions, 444 flow [2024-06-28 00:14:22,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:14:22,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:14:22,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:14:22,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 00:14:22,805 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)] === [2024-06-28 00:14:22,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:14:22,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1307636232, now seen corresponding path program 1 times [2024-06-28 00:14:22,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:14:22,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711798476] [2024-06-28 00:14:22,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:14:22,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:14:22,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:14:24,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:14:24,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:14:24,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711798476] [2024-06-28 00:14:24,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711798476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:14:24,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:14:24,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:14:24,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114301465] [2024-06-28 00:14:24,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:14:24,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:14:24,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:14:24,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:14:24,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:14:24,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:14:24,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 69 transitions, 444 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:14:24,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:14:24,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:14:24,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:14:25,167 INFO L124 PetriNetUnfolderBase]: 1639/2472 cut-off events. [2024-06-28 00:14:25,167 INFO L125 PetriNetUnfolderBase]: For 7491/7553 co-relation queries the response was YES. [2024-06-28 00:14:25,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9351 conditions, 2472 events. 1639/2472 cut-off events. For 7491/7553 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 11493 event pairs, 587 based on Foata normal form. 20/2473 useless extension candidates. Maximal degree in co-relation 9319. Up to 2348 conditions per place. [2024-06-28 00:14:25,191 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 76 selfloop transitions, 31 changer transitions 0/113 dead transitions. [2024-06-28 00:14:25,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 113 transitions, 874 flow [2024-06-28 00:14:25,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:14:25,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:14:25,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-28 00:14:25,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-06-28 00:14:25,194 INFO L175 Difference]: Start difference. First operand has 66 places, 69 transitions, 444 flow. Second operand 7 states and 136 transitions. [2024-06-28 00:14:25,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 113 transitions, 874 flow [2024-06-28 00:14:25,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 113 transitions, 874 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-28 00:14:25,200 INFO L231 Difference]: Finished difference. Result has 75 places, 83 transitions, 643 flow [2024-06-28 00:14:25,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=643, PETRI_PLACES=75, PETRI_TRANSITIONS=83} [2024-06-28 00:14:25,201 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 34 predicate places. [2024-06-28 00:14:25,201 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 83 transitions, 643 flow [2024-06-28 00:14:25,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:14:25,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:14:25,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:14:25,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 00:14:25,202 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)] === [2024-06-28 00:14:25,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:14:25,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1752199324, now seen corresponding path program 2 times [2024-06-28 00:14:25,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:14:25,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654214911] [2024-06-28 00:14:25,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:14:25,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:14:25,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:14:26,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:14:26,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:14:26,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654214911] [2024-06-28 00:14:26,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654214911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:14:26,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:14:26,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:14:26,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741334554] [2024-06-28 00:14:26,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:14:26,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:14:26,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:14:26,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:14:26,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:14:27,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:14:27,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 83 transitions, 643 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:14:27,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:14:27,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:14:27,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:14:27,981 INFO L124 PetriNetUnfolderBase]: 1729/2626 cut-off events. [2024-06-28 00:14:27,982 INFO L125 PetriNetUnfolderBase]: For 11564/11695 co-relation queries the response was YES. [2024-06-28 00:14:27,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10975 conditions, 2626 events. 1729/2626 cut-off events. For 11564/11695 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12445 event pairs, 755 based on Foata normal form. 23/2617 useless extension candidates. Maximal degree in co-relation 10938. Up to 2420 conditions per place. [2024-06-28 00:14:27,998 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 79 selfloop transitions, 57 changer transitions 0/142 dead transitions. [2024-06-28 00:14:27,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 142 transitions, 1367 flow [2024-06-28 00:14:28,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:14:28,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:14:28,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-28 00:14:28,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45625 [2024-06-28 00:14:28,001 INFO L175 Difference]: Start difference. First operand has 75 places, 83 transitions, 643 flow. Second operand 8 states and 146 transitions. [2024-06-28 00:14:28,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 142 transitions, 1367 flow [2024-06-28 00:14:28,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 142 transitions, 1304 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-28 00:14:28,013 INFO L231 Difference]: Finished difference. Result has 84 places, 112 transitions, 1061 flow [2024-06-28 00:14:28,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1061, PETRI_PLACES=84, PETRI_TRANSITIONS=112} [2024-06-28 00:14:28,015 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 43 predicate places. [2024-06-28 00:14:28,015 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 112 transitions, 1061 flow [2024-06-28 00:14:28,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:14:28,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:14:28,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:14:28,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 00:14:28,016 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)] === [2024-06-28 00:14:28,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:14:28,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1786482844, now seen corresponding path program 3 times [2024-06-28 00:14:28,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:14:28,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298084453] [2024-06-28 00:14:28,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:14:28,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:14:28,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:14:29,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:14:29,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:14:29,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298084453] [2024-06-28 00:14:29,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298084453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:14:29,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:14:29,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:14:29,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587547497] [2024-06-28 00:14:29,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:14:29,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:14:29,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:14:29,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:14:29,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:14:29,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:14:29,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 112 transitions, 1061 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:14:29,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:14:29,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:14:29,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:14:30,752 INFO L124 PetriNetUnfolderBase]: 1716/2612 cut-off events. [2024-06-28 00:14:30,752 INFO L125 PetriNetUnfolderBase]: For 13836/13955 co-relation queries the response was YES. [2024-06-28 00:14:30,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11555 conditions, 2612 events. 1716/2612 cut-off events. For 13836/13955 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12428 event pairs, 798 based on Foata normal form. 26/2603 useless extension candidates. Maximal degree in co-relation 11512. Up to 2485 conditions per place. [2024-06-28 00:14:30,771 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 104 selfloop transitions, 33 changer transitions 0/143 dead transitions. [2024-06-28 00:14:30,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 143 transitions, 1497 flow [2024-06-28 00:14:30,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:14:30,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:14:30,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-28 00:14:30,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-28 00:14:30,773 INFO L175 Difference]: Start difference. First operand has 84 places, 112 transitions, 1061 flow. Second operand 8 states and 137 transitions. [2024-06-28 00:14:30,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 143 transitions, 1497 flow [2024-06-28 00:14:30,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 143 transitions, 1399 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-28 00:14:30,791 INFO L231 Difference]: Finished difference. Result has 90 places, 119 transitions, 1136 flow [2024-06-28 00:14:30,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=968, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1136, PETRI_PLACES=90, PETRI_TRANSITIONS=119} [2024-06-28 00:14:30,792 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 49 predicate places. [2024-06-28 00:14:30,792 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 119 transitions, 1136 flow [2024-06-28 00:14:30,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:14:30,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:14:30,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:14:30,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 00:14:30,793 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)] === [2024-06-28 00:14:30,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:14:30,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1752319480, now seen corresponding path program 1 times [2024-06-28 00:14:30,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:14:30,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205079947] [2024-06-28 00:14:30,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:14:30,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:14:30,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:14:32,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:14:32,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:14:32,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205079947] [2024-06-28 00:14:32,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205079947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:14:32,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:14:32,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:14:32,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560978657] [2024-06-28 00:14:32,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:14:32,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:14:32,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:14:32,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:14:32,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:14:32,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:14:32,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 119 transitions, 1136 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:14:32,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:14:32,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:14:32,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:14:33,523 INFO L124 PetriNetUnfolderBase]: 1884/2827 cut-off events. [2024-06-28 00:14:33,523 INFO L125 PetriNetUnfolderBase]: For 15292/15295 co-relation queries the response was YES. [2024-06-28 00:14:33,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12407 conditions, 2827 events. 1884/2827 cut-off events. For 15292/15295 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13230 event pairs, 866 based on Foata normal form. 2/2826 useless extension candidates. Maximal degree in co-relation 12362. Up to 2701 conditions per place. [2024-06-28 00:14:33,541 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 139 selfloop transitions, 29 changer transitions 0/171 dead transitions. [2024-06-28 00:14:33,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 171 transitions, 1812 flow [2024-06-28 00:14:33,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:14:33,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:14:33,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-28 00:14:33,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-28 00:14:33,543 INFO L175 Difference]: Start difference. First operand has 90 places, 119 transitions, 1136 flow. Second operand 8 states and 136 transitions. [2024-06-28 00:14:33,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 171 transitions, 1812 flow [2024-06-28 00:14:33,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 171 transitions, 1665 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-28 00:14:33,566 INFO L231 Difference]: Finished difference. Result has 97 places, 140 transitions, 1282 flow [2024-06-28 00:14:33,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1015, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1282, PETRI_PLACES=97, PETRI_TRANSITIONS=140} [2024-06-28 00:14:33,566 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 56 predicate places. [2024-06-28 00:14:33,566 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 140 transitions, 1282 flow [2024-06-28 00:14:33,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:14:33,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:14:33,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:14:33,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 00:14:33,567 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:14:33,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:14:33,568 INFO L85 PathProgramCache]: Analyzing trace with hash 64950304, now seen corresponding path program 4 times [2024-06-28 00:14:33,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:14:33,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980917842] [2024-06-28 00:14:33,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:14:33,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:14:33,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:14:34,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:14:34,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:14:34,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980917842] [2024-06-28 00:14:34,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980917842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:14:34,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:14:34,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:14:34,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687442775] [2024-06-28 00:14:34,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:14:34,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:14:34,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:14:34,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:14:34,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:14:34,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:14:34,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 140 transitions, 1282 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:14:34,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:14:34,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:14:34,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:14:35,358 INFO L124 PetriNetUnfolderBase]: 1979/2970 cut-off events. [2024-06-28 00:14:35,359 INFO L125 PetriNetUnfolderBase]: For 18639/18642 co-relation queries the response was YES. [2024-06-28 00:14:35,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13793 conditions, 2970 events. 1979/2970 cut-off events. For 18639/18642 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13988 event pairs, 923 based on Foata normal form. 6/2973 useless extension candidates. Maximal degree in co-relation 13744. Up to 2797 conditions per place. [2024-06-28 00:14:35,379 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 145 selfloop transitions, 54 changer transitions 0/202 dead transitions. [2024-06-28 00:14:35,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 202 transitions, 2245 flow [2024-06-28 00:14:35,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:14:35,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:14:35,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-28 00:14:35,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43214285714285716 [2024-06-28 00:14:35,381 INFO L175 Difference]: Start difference. First operand has 97 places, 140 transitions, 1282 flow. Second operand 7 states and 121 transitions. [2024-06-28 00:14:35,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 202 transitions, 2245 flow [2024-06-28 00:14:35,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 202 transitions, 2223 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-28 00:14:35,409 INFO L231 Difference]: Finished difference. Result has 105 places, 180 transitions, 1929 flow [2024-06-28 00:14:35,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1266, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1929, PETRI_PLACES=105, PETRI_TRANSITIONS=180} [2024-06-28 00:14:35,409 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 64 predicate places. [2024-06-28 00:14:35,410 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 180 transitions, 1929 flow [2024-06-28 00:14:35,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:14:35,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:14:35,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:14:35,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 00:14:35,410 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)] === [2024-06-28 00:14:35,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:14:35,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1849304366, now seen corresponding path program 5 times [2024-06-28 00:14:35,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:14:35,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245388371] [2024-06-28 00:14:35,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:14:35,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:14:35,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:14:36,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:14:36,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:14:36,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245388371] [2024-06-28 00:14:36,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245388371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:14:36,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:14:36,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:14:36,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836376745] [2024-06-28 00:14:36,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:14:36,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:14:36,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:14:36,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:14:36,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:14:36,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:14:36,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 180 transitions, 1929 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:14:36,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:14:36,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:14:36,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:14:37,277 INFO L124 PetriNetUnfolderBase]: 1975/2989 cut-off events. [2024-06-28 00:14:37,277 INFO L125 PetriNetUnfolderBase]: For 24807/24938 co-relation queries the response was YES. [2024-06-28 00:14:37,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15145 conditions, 2989 events. 1975/2989 cut-off events. For 24807/24938 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14376 event pairs, 824 based on Foata normal form. 16/2922 useless extension candidates. Maximal degree in co-relation 15091. Up to 2787 conditions per place. [2024-06-28 00:14:37,296 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 147 selfloop transitions, 73 changer transitions 0/236 dead transitions. [2024-06-28 00:14:37,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 236 transitions, 2940 flow [2024-06-28 00:14:37,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:14:37,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:14:37,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-28 00:14:37,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-28 00:14:37,298 INFO L175 Difference]: Start difference. First operand has 105 places, 180 transitions, 1929 flow. Second operand 8 states and 127 transitions. [2024-06-28 00:14:37,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 236 transitions, 2940 flow [2024-06-28 00:14:37,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 236 transitions, 2903 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-28 00:14:37,333 INFO L231 Difference]: Finished difference. Result has 114 places, 218 transitions, 2669 flow [2024-06-28 00:14:37,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1892, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2669, PETRI_PLACES=114, PETRI_TRANSITIONS=218} [2024-06-28 00:14:37,334 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 73 predicate places. [2024-06-28 00:14:37,334 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 218 transitions, 2669 flow [2024-06-28 00:14:37,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:14:37,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:14:37,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:14:37,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 00:14:37,356 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)] === [2024-06-28 00:14:37,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:14:37,357 INFO L85 PathProgramCache]: Analyzing trace with hash 64955140, now seen corresponding path program 2 times [2024-06-28 00:14:37,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:14:37,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535867020] [2024-06-28 00:14:37,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:14:37,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:14:37,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:14:38,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:14:38,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:14:38,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535867020] [2024-06-28 00:14:38,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535867020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:14:38,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:14:38,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:14:38,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501044270] [2024-06-28 00:14:38,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:14:38,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:14:38,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:14:38,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:14:38,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:14:38,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:14:38,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 218 transitions, 2669 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:14:38,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:14:38,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:14:38,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:14:39,032 INFO L124 PetriNetUnfolderBase]: 2097/3145 cut-off events. [2024-06-28 00:14:39,032 INFO L125 PetriNetUnfolderBase]: For 27375/27378 co-relation queries the response was YES. [2024-06-28 00:14:39,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16319 conditions, 3145 events. 2097/3145 cut-off events. For 27375/27378 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14942 event pairs, 931 based on Foata normal form. 3/3145 useless extension candidates. Maximal degree in co-relation 16260. Up to 2999 conditions per place. [2024-06-28 00:14:39,053 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 209 selfloop transitions, 42 changer transitions 0/254 dead transitions. [2024-06-28 00:14:39,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 254 transitions, 3421 flow [2024-06-28 00:14:39,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:14:39,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:14:39,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-28 00:14:39,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41785714285714287 [2024-06-28 00:14:39,056 INFO L175 Difference]: Start difference. First operand has 114 places, 218 transitions, 2669 flow. Second operand 7 states and 117 transitions. [2024-06-28 00:14:39,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 254 transitions, 3421 flow [2024-06-28 00:14:39,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 254 transitions, 3232 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-28 00:14:39,093 INFO L231 Difference]: Finished difference. Result has 118 places, 232 transitions, 2728 flow [2024-06-28 00:14:39,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2482, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2728, PETRI_PLACES=118, PETRI_TRANSITIONS=232} [2024-06-28 00:14:39,094 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 77 predicate places. [2024-06-28 00:14:39,094 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 232 transitions, 2728 flow [2024-06-28 00:14:39,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:14:39,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:14:39,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:14:39,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 00:14:39,095 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)] === [2024-06-28 00:14:39,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:14:39,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1286243008, now seen corresponding path program 3 times [2024-06-28 00:14:39,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:14:39,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984382878] [2024-06-28 00:14:39,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:14:39,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:14:39,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:14:40,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:14:40,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:14:40,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984382878] [2024-06-28 00:14:40,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984382878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:14:40,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:14:40,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:14:40,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591878828] [2024-06-28 00:14:40,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:14:40,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:14:40,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:14:40,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:14:40,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:14:40,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:14:40,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 232 transitions, 2728 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:14:40,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:14:40,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:14:40,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:14:40,762 INFO L124 PetriNetUnfolderBase]: 2115/3166 cut-off events. [2024-06-28 00:14:40,762 INFO L125 PetriNetUnfolderBase]: For 29652/29655 co-relation queries the response was YES. [2024-06-28 00:14:40,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16698 conditions, 3166 events. 2115/3166 cut-off events. For 29652/29655 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14973 event pairs, 947 based on Foata normal form. 5/3168 useless extension candidates. Maximal degree in co-relation 16638. Up to 3095 conditions per place. [2024-06-28 00:14:40,781 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 233 selfloop transitions, 17 changer transitions 0/253 dead transitions. [2024-06-28 00:14:40,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 253 transitions, 3350 flow [2024-06-28 00:14:40,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:14:40,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:14:40,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-28 00:14:40,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041666666666667 [2024-06-28 00:14:40,783 INFO L175 Difference]: Start difference. First operand has 118 places, 232 transitions, 2728 flow. Second operand 6 states and 97 transitions. [2024-06-28 00:14:40,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 253 transitions, 3350 flow [2024-06-28 00:14:40,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 253 transitions, 3335 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-28 00:14:40,817 INFO L231 Difference]: Finished difference. Result has 123 places, 238 transitions, 2830 flow [2024-06-28 00:14:40,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2713, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2830, PETRI_PLACES=123, PETRI_TRANSITIONS=238} [2024-06-28 00:14:40,817 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 82 predicate places. [2024-06-28 00:14:40,817 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 238 transitions, 2830 flow [2024-06-28 00:14:40,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:14:40,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:14:40,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:14:40,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 00:14:40,818 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)] === [2024-06-28 00:14:40,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:14:40,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1286480344, now seen corresponding path program 6 times [2024-06-28 00:14:40,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:14:40,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055695104] [2024-06-28 00:14:40,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:14:40,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:14:40,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:14:41,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:14:41,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:14:41,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055695104] [2024-06-28 00:14:41,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055695104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:14:41,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:14:41,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:14:41,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280428452] [2024-06-28 00:14:41,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:14:41,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:14:41,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:14:41,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:14:41,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:14:41,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:14:41,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 238 transitions, 2830 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:14:41,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:14:41,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:14:41,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:14:42,522 INFO L124 PetriNetUnfolderBase]: 2101/3152 cut-off events. [2024-06-28 00:14:42,522 INFO L125 PetriNetUnfolderBase]: For 32801/32804 co-relation queries the response was YES. [2024-06-28 00:14:42,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16814 conditions, 3152 events. 2101/3152 cut-off events. For 32801/32804 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15006 event pairs, 933 based on Foata normal form. 7/3156 useless extension candidates. Maximal degree in co-relation 16751. Up to 3018 conditions per place. [2024-06-28 00:14:42,547 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 211 selfloop transitions, 42 changer transitions 0/256 dead transitions. [2024-06-28 00:14:42,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 256 transitions, 3424 flow [2024-06-28 00:14:42,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:14:42,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:14:42,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-28 00:14:42,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-28 00:14:42,549 INFO L175 Difference]: Start difference. First operand has 123 places, 238 transitions, 2830 flow. Second operand 6 states and 104 transitions. [2024-06-28 00:14:42,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 256 transitions, 3424 flow [2024-06-28 00:14:42,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 256 transitions, 3362 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-28 00:14:42,597 INFO L231 Difference]: Finished difference. Result has 126 places, 240 transitions, 2921 flow [2024-06-28 00:14:42,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2768, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2921, PETRI_PLACES=126, PETRI_TRANSITIONS=240} [2024-06-28 00:14:42,598 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 85 predicate places. [2024-06-28 00:14:42,599 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 240 transitions, 2921 flow [2024-06-28 00:14:42,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:14:42,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:14:42,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:14:42,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 00:14:42,599 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)] === [2024-06-28 00:14:42,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:14:42,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1286480158, now seen corresponding path program 4 times [2024-06-28 00:14:42,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:14:42,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069252375] [2024-06-28 00:14:42,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:14:42,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:14:42,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:14:43,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:14:43,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:14:43,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069252375] [2024-06-28 00:14:43,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069252375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:14:43,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:14:43,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:14:43,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941169149] [2024-06-28 00:14:43,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:14:43,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:14:43,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:14:43,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:14:43,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:14:43,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:14:43,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 240 transitions, 2921 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:14:43,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:14:43,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:14:43,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:14:44,327 INFO L124 PetriNetUnfolderBase]: 2093/3140 cut-off events. [2024-06-28 00:14:44,327 INFO L125 PetriNetUnfolderBase]: For 35950/35953 co-relation queries the response was YES. [2024-06-28 00:14:44,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17108 conditions, 3140 events. 2093/3140 cut-off events. For 35950/35953 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14905 event pairs, 932 based on Foata normal form. 3/3140 useless extension candidates. Maximal degree in co-relation 17043. Up to 2992 conditions per place. [2024-06-28 00:14:44,352 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 205 selfloop transitions, 48 changer transitions 0/256 dead transitions. [2024-06-28 00:14:44,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 256 transitions, 3500 flow [2024-06-28 00:14:44,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:14:44,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:14:44,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-28 00:14:44,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42083333333333334 [2024-06-28 00:14:44,354 INFO L175 Difference]: Start difference. First operand has 126 places, 240 transitions, 2921 flow. Second operand 6 states and 101 transitions. [2024-06-28 00:14:44,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 256 transitions, 3500 flow [2024-06-28 00:14:44,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 256 transitions, 3437 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-28 00:14:44,408 INFO L231 Difference]: Finished difference. Result has 130 places, 241 transitions, 3021 flow [2024-06-28 00:14:44,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2859, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3021, PETRI_PLACES=130, PETRI_TRANSITIONS=241} [2024-06-28 00:14:44,409 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 89 predicate places. [2024-06-28 00:14:44,409 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 241 transitions, 3021 flow [2024-06-28 00:14:44,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:14:44,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:14:44,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:14:44,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 00:14:44,411 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)] === [2024-06-28 00:14:44,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:14:44,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1286234080, now seen corresponding path program 1 times [2024-06-28 00:14:44,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:14:44,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866110264] [2024-06-28 00:14:44,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:14:44,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:14:44,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:14:46,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:14:46,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:14:46,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866110264] [2024-06-28 00:14:46,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866110264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:14:46,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:14:46,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:14:46,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100781910] [2024-06-28 00:14:46,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:14:46,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:14:46,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:14:46,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:14:46,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:14:46,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:14:46,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 241 transitions, 3021 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:14:46,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:14:46,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:14:46,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:14:46,889 INFO L124 PetriNetUnfolderBase]: 2085/3124 cut-off events. [2024-06-28 00:14:46,889 INFO L125 PetriNetUnfolderBase]: For 39095/39098 co-relation queries the response was YES. [2024-06-28 00:14:46,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17363 conditions, 3124 events. 2085/3124 cut-off events. For 39095/39098 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14789 event pairs, 927 based on Foata normal form. 6/3127 useless extension candidates. Maximal degree in co-relation 17296. Up to 3037 conditions per place. [2024-06-28 00:14:46,908 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 241 selfloop transitions, 15 changer transitions 0/259 dead transitions. [2024-06-28 00:14:46,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 259 transitions, 3613 flow [2024-06-28 00:14:46,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:14:46,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:14:46,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2024-06-28 00:14:46,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-28 00:14:46,910 INFO L175 Difference]: Start difference. First operand has 130 places, 241 transitions, 3021 flow. Second operand 7 states and 105 transitions. [2024-06-28 00:14:46,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 259 transitions, 3613 flow [2024-06-28 00:14:46,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 259 transitions, 3539 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-28 00:14:46,964 INFO L231 Difference]: Finished difference. Result has 134 places, 243 transitions, 3004 flow [2024-06-28 00:14:46,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2947, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3004, PETRI_PLACES=134, PETRI_TRANSITIONS=243} [2024-06-28 00:14:46,964 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 93 predicate places. [2024-06-28 00:14:46,964 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 243 transitions, 3004 flow [2024-06-28 00:14:46,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:14:46,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:14:46,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:14:46,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 00:14:46,965 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)] === [2024-06-28 00:14:46,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:14:46,966 INFO L85 PathProgramCache]: Analyzing trace with hash -2004292035, now seen corresponding path program 1 times [2024-06-28 00:14:46,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:14:46,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463770712] [2024-06-28 00:14:46,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:14:46,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:14:46,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:14:48,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:14:48,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:14:48,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463770712] [2024-06-28 00:14:48,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463770712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:14:48,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:14:48,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:14:48,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651431787] [2024-06-28 00:14:48,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:14:48,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:14:48,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:14:48,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:14:48,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:14:48,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 00:14:48,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 243 transitions, 3004 flow. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:14:48,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:14:48,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 00:14:48,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:14:49,364 INFO L124 PetriNetUnfolderBase]: 2038/3086 cut-off events. [2024-06-28 00:14:49,364 INFO L125 PetriNetUnfolderBase]: For 49691/49800 co-relation queries the response was YES. [2024-06-28 00:14:49,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17672 conditions, 3086 events. 2038/3086 cut-off events. For 49691/49800 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 14990 event pairs, 604 based on Foata normal form. 23/2991 useless extension candidates. Maximal degree in co-relation 17604. Up to 2207 conditions per place. [2024-06-28 00:14:49,387 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 121 selfloop transitions, 118 changer transitions 0/303 dead transitions. [2024-06-28 00:14:49,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 303 transitions, 3927 flow [2024-06-28 00:14:49,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:14:49,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:14:49,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-28 00:14:49,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-28 00:14:49,389 INFO L175 Difference]: Start difference. First operand has 134 places, 243 transitions, 3004 flow. Second operand 7 states and 150 transitions. [2024-06-28 00:14:49,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 303 transitions, 3927 flow [2024-06-28 00:14:49,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 303 transitions, 3878 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-28 00:14:49,451 INFO L231 Difference]: Finished difference. Result has 140 places, 267 transitions, 3554 flow [2024-06-28 00:14:49,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2955, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3554, PETRI_PLACES=140, PETRI_TRANSITIONS=267} [2024-06-28 00:14:49,451 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 99 predicate places. [2024-06-28 00:14:49,451 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 267 transitions, 3554 flow [2024-06-28 00:14:49,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:14:49,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:14:49,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:14:49,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 00:14:49,452 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)] === [2024-06-28 00:14:49,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:14:49,452 INFO L85 PathProgramCache]: Analyzing trace with hash 934422917, now seen corresponding path program 2 times [2024-06-28 00:14:49,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:14:49,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049047213] [2024-06-28 00:14:49,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:14:49,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:14:49,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:14:50,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:14:50,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:14:50,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049047213] [2024-06-28 00:14:50,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049047213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:14:50,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:14:50,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:14:50,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218722879] [2024-06-28 00:14:50,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:14:50,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:14:50,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:14:50,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:14:50,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:14:51,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 00:14:51,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 267 transitions, 3554 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:14:51,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:14:51,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 00:14:51,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:14:51,795 INFO L124 PetriNetUnfolderBase]: 2132/3210 cut-off events. [2024-06-28 00:14:51,795 INFO L125 PetriNetUnfolderBase]: For 58248/58385 co-relation queries the response was YES. [2024-06-28 00:14:51,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20427 conditions, 3210 events. 2132/3210 cut-off events. For 58248/58385 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 15508 event pairs, 697 based on Foata normal form. 34/3165 useless extension candidates. Maximal degree in co-relation 20356. Up to 2417 conditions per place. [2024-06-28 00:14:51,820 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 162 selfloop transitions, 139 changer transitions 0/327 dead transitions. [2024-06-28 00:14:51,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 327 transitions, 4698 flow [2024-06-28 00:14:51,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:14:51,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:14:51,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-28 00:14:51,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-28 00:14:51,823 INFO L175 Difference]: Start difference. First operand has 140 places, 267 transitions, 3554 flow. Second operand 7 states and 157 transitions. [2024-06-28 00:14:51,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 327 transitions, 4698 flow [2024-06-28 00:14:51,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 327 transitions, 4647 flow, removed 20 selfloop flow, removed 1 redundant places. [2024-06-28 00:14:51,892 INFO L231 Difference]: Finished difference. Result has 147 places, 286 transitions, 4108 flow [2024-06-28 00:14:51,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3525, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4108, PETRI_PLACES=147, PETRI_TRANSITIONS=286} [2024-06-28 00:14:51,893 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 106 predicate places. [2024-06-28 00:14:51,893 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 286 transitions, 4108 flow [2024-06-28 00:14:51,893 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) [2024-06-28 00:14:51,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:14:51,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:14:51,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 00:14:51,893 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)] === [2024-06-28 00:14:51,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:14:51,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1882018378, now seen corresponding path program 1 times [2024-06-28 00:14:51,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:14:51,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297811959] [2024-06-28 00:14:51,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:14:51,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:14:51,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:14:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:14:53,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:14:53,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297811959] [2024-06-28 00:14:53,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297811959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:14:53,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:14:53,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:14:53,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197730916] [2024-06-28 00:14:53,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:14:53,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:14:53,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:14:53,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:14:53,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:14:53,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:14:53,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 286 transitions, 4108 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:14:53,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:14:53,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:14:53,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:14:54,806 INFO L124 PetriNetUnfolderBase]: 2261/3373 cut-off events. [2024-06-28 00:14:54,806 INFO L125 PetriNetUnfolderBase]: For 55572/55578 co-relation queries the response was YES. [2024-06-28 00:14:54,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22015 conditions, 3373 events. 2261/3373 cut-off events. For 55572/55578 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 16031 event pairs, 811 based on Foata normal form. 4/3374 useless extension candidates. Maximal degree in co-relation 21941. Up to 2960 conditions per place. [2024-06-28 00:14:54,833 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 258 selfloop transitions, 101 changer transitions 0/362 dead transitions. [2024-06-28 00:14:54,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 362 transitions, 5630 flow [2024-06-28 00:14:54,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:14:54,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:14:54,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-28 00:14:54,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-28 00:14:54,834 INFO L175 Difference]: Start difference. First operand has 147 places, 286 transitions, 4108 flow. Second operand 9 states and 155 transitions. [2024-06-28 00:14:54,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 362 transitions, 5630 flow [2024-06-28 00:14:54,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 362 transitions, 5517 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-28 00:14:54,907 INFO L231 Difference]: Finished difference. Result has 157 places, 319 transitions, 4748 flow [2024-06-28 00:14:54,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4001, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4748, PETRI_PLACES=157, PETRI_TRANSITIONS=319} [2024-06-28 00:14:54,907 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 116 predicate places. [2024-06-28 00:14:54,907 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 319 transitions, 4748 flow [2024-06-28 00:14:54,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:14:54,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:14:54,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:14:54,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 00:14:54,909 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)] === [2024-06-28 00:14:54,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:14:54,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1847854673, now seen corresponding path program 3 times [2024-06-28 00:14:54,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:14:54,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881122018] [2024-06-28 00:14:54,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:14:54,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:14:54,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:14:56,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:14:56,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:14:56,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881122018] [2024-06-28 00:14:56,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881122018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:14:56,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:14:56,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:14:56,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262583857] [2024-06-28 00:14:56,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:14:56,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:14:56,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:14:56,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:14:56,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:14:56,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 00:14:56,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 319 transitions, 4748 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:14:56,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:14:56,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 00:14:56,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:14:57,243 INFO L124 PetriNetUnfolderBase]: 2241/3361 cut-off events. [2024-06-28 00:14:57,243 INFO L125 PetriNetUnfolderBase]: For 68970/69067 co-relation queries the response was YES. [2024-06-28 00:14:57,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23389 conditions, 3361 events. 2241/3361 cut-off events. For 68970/69067 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 16307 event pairs, 671 based on Foata normal form. 25/3292 useless extension candidates. Maximal degree in co-relation 23309. Up to 2670 conditions per place. [2024-06-28 00:14:57,276 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 180 selfloop transitions, 162 changer transitions 0/376 dead transitions. [2024-06-28 00:14:57,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 376 transitions, 6031 flow [2024-06-28 00:14:57,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:14:57,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:14:57,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-28 00:14:57,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503125 [2024-06-28 00:14:57,278 INFO L175 Difference]: Start difference. First operand has 157 places, 319 transitions, 4748 flow. Second operand 8 states and 161 transitions. [2024-06-28 00:14:57,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 376 transitions, 6031 flow [2024-06-28 00:14:57,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 376 transitions, 5922 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-28 00:14:57,364 INFO L231 Difference]: Finished difference. Result has 162 places, 334 transitions, 5214 flow [2024-06-28 00:14:57,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4639, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5214, PETRI_PLACES=162, PETRI_TRANSITIONS=334} [2024-06-28 00:14:57,364 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 121 predicate places. [2024-06-28 00:14:57,364 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 334 transitions, 5214 flow [2024-06-28 00:14:57,365 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) [2024-06-28 00:14:57,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:14:57,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:14:57,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 00:14:57,365 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)] === [2024-06-28 00:14:57,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:14:57,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1516394954, now seen corresponding path program 2 times [2024-06-28 00:14:57,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:14:57,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053412268] [2024-06-28 00:14:57,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:14:57,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:14:57,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:14:59,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:14:59,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:14:59,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053412268] [2024-06-28 00:14:59,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053412268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:14:59,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:14:59,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:14:59,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86233338] [2024-06-28 00:14:59,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:14:59,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:14:59,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:14:59,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:14:59,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:14:59,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:14:59,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 334 transitions, 5214 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:14:59,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:14:59,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:14:59,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:15:00,839 INFO L124 PetriNetUnfolderBase]: 2396/3567 cut-off events. [2024-06-28 00:15:00,839 INFO L125 PetriNetUnfolderBase]: For 69824/69832 co-relation queries the response was YES. [2024-06-28 00:15:00,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24994 conditions, 3567 events. 2396/3567 cut-off events. For 69824/69832 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 17031 event pairs, 779 based on Foata normal form. 7/3571 useless extension candidates. Maximal degree in co-relation 24912. Up to 3134 conditions per place. [2024-06-28 00:15:00,872 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 278 selfloop transitions, 118 changer transitions 0/399 dead transitions. [2024-06-28 00:15:00,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 399 transitions, 6694 flow [2024-06-28 00:15:00,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:15:00,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:15:00,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-28 00:15:00,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361111111111111 [2024-06-28 00:15:00,874 INFO L175 Difference]: Start difference. First operand has 162 places, 334 transitions, 5214 flow. Second operand 9 states and 157 transitions. [2024-06-28 00:15:00,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 399 transitions, 6694 flow [2024-06-28 00:15:00,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 399 transitions, 6368 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-28 00:15:00,988 INFO L231 Difference]: Finished difference. Result has 169 places, 359 transitions, 5473 flow [2024-06-28 00:15:00,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4902, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5473, PETRI_PLACES=169, PETRI_TRANSITIONS=359} [2024-06-28 00:15:00,989 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 128 predicate places. [2024-06-28 00:15:00,989 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 359 transitions, 5473 flow [2024-06-28 00:15:00,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:15:00,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:15:00,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:15:00,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 00:15:00,990 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)] === [2024-06-28 00:15:00,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:15:00,990 INFO L85 PathProgramCache]: Analyzing trace with hash -453605989, now seen corresponding path program 4 times [2024-06-28 00:15:00,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:15:00,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724399625] [2024-06-28 00:15:00,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:15:00,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:15:01,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:15:02,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:15:02,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:15:02,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724399625] [2024-06-28 00:15:02,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724399625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:15:02,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:15:02,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:15:02,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871732697] [2024-06-28 00:15:02,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:15:02,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:15:02,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:15:02,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:15:02,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:15:02,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 00:15:02,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 359 transitions, 5473 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:15:02,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:15:02,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 00:15:02,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:15:03,423 INFO L124 PetriNetUnfolderBase]: 2379/3565 cut-off events. [2024-06-28 00:15:03,424 INFO L125 PetriNetUnfolderBase]: For 83755/83826 co-relation queries the response was YES. [2024-06-28 00:15:03,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25866 conditions, 3565 events. 2379/3565 cut-off events. For 83755/83826 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 17491 event pairs, 762 based on Foata normal form. 8/3471 useless extension candidates. Maximal degree in co-relation 25780. Up to 3080 conditions per place. [2024-06-28 00:15:03,453 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 264 selfloop transitions, 100 changer transitions 0/409 dead transitions. [2024-06-28 00:15:03,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 409 transitions, 6733 flow [2024-06-28 00:15:03,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:15:03,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:15:03,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-28 00:15:03,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.490625 [2024-06-28 00:15:03,454 INFO L175 Difference]: Start difference. First operand has 169 places, 359 transitions, 5473 flow. Second operand 8 states and 157 transitions. [2024-06-28 00:15:03,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 409 transitions, 6733 flow [2024-06-28 00:15:03,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 409 transitions, 6604 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-28 00:15:03,569 INFO L231 Difference]: Finished difference. Result has 175 places, 373 transitions, 5806 flow [2024-06-28 00:15:03,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5344, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5806, PETRI_PLACES=175, PETRI_TRANSITIONS=373} [2024-06-28 00:15:03,570 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 134 predicate places. [2024-06-28 00:15:03,570 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 373 transitions, 5806 flow [2024-06-28 00:15:03,570 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) [2024-06-28 00:15:03,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:15:03,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:15:03,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 00:15:03,570 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:15:03,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:15:03,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1512670087, now seen corresponding path program 1 times [2024-06-28 00:15:03,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:15:03,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022354482] [2024-06-28 00:15:03,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:15:03,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:15:03,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:15:05,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:15:05,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:15:05,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022354482] [2024-06-28 00:15:05,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022354482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:15:05,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:15:05,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:15:05,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224712633] [2024-06-28 00:15:05,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:15:05,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:15:05,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:15:05,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:15:05,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:15:05,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:15:05,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 373 transitions, 5806 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:15:05,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:15:05,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:15:05,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:15:06,252 INFO L124 PetriNetUnfolderBase]: 2515/3737 cut-off events. [2024-06-28 00:15:06,252 INFO L125 PetriNetUnfolderBase]: For 83406/83412 co-relation queries the response was YES. [2024-06-28 00:15:06,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26905 conditions, 3737 events. 2515/3737 cut-off events. For 83406/83412 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 17987 event pairs, 844 based on Foata normal form. 4/3738 useless extension candidates. Maximal degree in co-relation 26817. Up to 3516 conditions per place. [2024-06-28 00:15:06,291 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 350 selfloop transitions, 58 changer transitions 0/411 dead transitions. [2024-06-28 00:15:06,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 411 transitions, 6946 flow [2024-06-28 00:15:06,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:15:06,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:15:06,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-28 00:15:06,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-06-28 00:15:06,293 INFO L175 Difference]: Start difference. First operand has 175 places, 373 transitions, 5806 flow. Second operand 7 states and 132 transitions. [2024-06-28 00:15:06,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 411 transitions, 6946 flow [2024-06-28 00:15:06,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 411 transitions, 6775 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-28 00:15:06,434 INFO L231 Difference]: Finished difference. Result has 179 places, 383 transitions, 5877 flow [2024-06-28 00:15:06,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5635, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5877, PETRI_PLACES=179, PETRI_TRANSITIONS=383} [2024-06-28 00:15:06,434 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 138 predicate places. [2024-06-28 00:15:06,434 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 383 transitions, 5877 flow [2024-06-28 00:15:06,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:15:06,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:15:06,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:15:06,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 00:15:06,435 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)] === [2024-06-28 00:15:06,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:15:06,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1512670304, now seen corresponding path program 3 times [2024-06-28 00:15:06,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:15:06,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674706147] [2024-06-28 00:15:06,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:15:06,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:15:06,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:15:08,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:15:08,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:15:08,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674706147] [2024-06-28 00:15:08,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674706147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:15:08,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:15:08,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:15:08,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036939947] [2024-06-28 00:15:08,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:15:08,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:15:08,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:15:08,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:15:08,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:15:08,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:15:08,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 383 transitions, 5877 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:15:08,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:15:08,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:15:08,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:15:10,043 INFO L124 PetriNetUnfolderBase]: 2543/3778 cut-off events. [2024-06-28 00:15:10,043 INFO L125 PetriNetUnfolderBase]: For 89667/89673 co-relation queries the response was YES. [2024-06-28 00:15:10,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27667 conditions, 3778 events. 2543/3778 cut-off events. For 89667/89673 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 18214 event pairs, 841 based on Foata normal form. 5/3780 useless extension candidates. Maximal degree in co-relation 27578. Up to 3551 conditions per place. [2024-06-28 00:15:10,084 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 356 selfloop transitions, 78 changer transitions 0/437 dead transitions. [2024-06-28 00:15:10,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 437 transitions, 7201 flow [2024-06-28 00:15:10,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:15:10,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:15:10,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-06-28 00:15:10,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4022727272727273 [2024-06-28 00:15:10,086 INFO L175 Difference]: Start difference. First operand has 179 places, 383 transitions, 5877 flow. Second operand 11 states and 177 transitions. [2024-06-28 00:15:10,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 437 transitions, 7201 flow [2024-06-28 00:15:10,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 437 transitions, 7149 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-28 00:15:10,237 INFO L231 Difference]: Finished difference. Result has 188 places, 398 transitions, 6206 flow [2024-06-28 00:15:10,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5829, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6206, PETRI_PLACES=188, PETRI_TRANSITIONS=398} [2024-06-28 00:15:10,238 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 147 predicate places. [2024-06-28 00:15:10,238 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 398 transitions, 6206 flow [2024-06-28 00:15:10,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:15:10,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:15:10,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:15:10,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 00:15:10,238 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)] === [2024-06-28 00:15:10,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:15:10,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1512675884, now seen corresponding path program 4 times [2024-06-28 00:15:10,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:15:10,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870791993] [2024-06-28 00:15:10,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:15:10,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:15:10,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:15:12,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:15:12,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:15:12,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870791993] [2024-06-28 00:15:12,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870791993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:15:12,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:15:12,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:15:12,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30477441] [2024-06-28 00:15:12,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:15:12,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:15:12,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:15:12,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:15:12,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:15:12,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:15:12,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 398 transitions, 6206 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:15:12,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:15:12,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:15:12,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:15:13,584 INFO L124 PetriNetUnfolderBase]: 2535/3767 cut-off events. [2024-06-28 00:15:13,584 INFO L125 PetriNetUnfolderBase]: For 89854/89860 co-relation queries the response was YES. [2024-06-28 00:15:13,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27809 conditions, 3767 events. 2535/3767 cut-off events. For 89854/89860 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 18160 event pairs, 841 based on Foata normal form. 5/3769 useless extension candidates. Maximal degree in co-relation 27717. Up to 3543 conditions per place. [2024-06-28 00:15:13,620 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 349 selfloop transitions, 76 changer transitions 0/428 dead transitions. [2024-06-28 00:15:13,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 428 transitions, 7204 flow [2024-06-28 00:15:13,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:15:13,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:15:13,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-28 00:15:13,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41388888888888886 [2024-06-28 00:15:13,622 INFO L175 Difference]: Start difference. First operand has 188 places, 398 transitions, 6206 flow. Second operand 9 states and 149 transitions. [2024-06-28 00:15:13,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 428 transitions, 7204 flow [2024-06-28 00:15:13,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 428 transitions, 7128 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-28 00:15:13,777 INFO L231 Difference]: Finished difference. Result has 194 places, 398 transitions, 6295 flow [2024-06-28 00:15:13,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6130, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6295, PETRI_PLACES=194, PETRI_TRANSITIONS=398} [2024-06-28 00:15:13,778 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 153 predicate places. [2024-06-28 00:15:13,778 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 398 transitions, 6295 flow [2024-06-28 00:15:13,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:15:13,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:15:13,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:15:13,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 00:15:13,778 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)] === [2024-06-28 00:15:13,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:15:13,779 INFO L85 PathProgramCache]: Analyzing trace with hash 2009885354, now seen corresponding path program 5 times [2024-06-28 00:15:13,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:15:13,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150382792] [2024-06-28 00:15:13,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:15:13,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:15:13,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:15:14,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:15:14,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:15:14,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150382792] [2024-06-28 00:15:14,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150382792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:15:14,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:15:14,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:15:14,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355519861] [2024-06-28 00:15:14,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:15:14,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:15:14,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:15:14,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:15:14,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:15:14,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:15:14,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 398 transitions, 6295 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:15:14,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:15:14,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:15:14,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:15:15,827 INFO L124 PetriNetUnfolderBase]: 2615/3885 cut-off events. [2024-06-28 00:15:15,827 INFO L125 PetriNetUnfolderBase]: For 99296/99299 co-relation queries the response was YES. [2024-06-28 00:15:15,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28918 conditions, 3885 events. 2615/3885 cut-off events. For 99296/99299 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 18852 event pairs, 932 based on Foata normal form. 5/3887 useless extension candidates. Maximal degree in co-relation 28824. Up to 3467 conditions per place. [2024-06-28 00:15:15,866 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 356 selfloop transitions, 101 changer transitions 0/460 dead transitions. [2024-06-28 00:15:15,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 460 transitions, 7902 flow [2024-06-28 00:15:15,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:15:15,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:15:15,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-28 00:15:15,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-28 00:15:15,867 INFO L175 Difference]: Start difference. First operand has 194 places, 398 transitions, 6295 flow. Second operand 8 states and 139 transitions. [2024-06-28 00:15:15,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 460 transitions, 7902 flow [2024-06-28 00:15:16,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 460 transitions, 7738 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-28 00:15:16,020 INFO L231 Difference]: Finished difference. Result has 197 places, 423 transitions, 6769 flow [2024-06-28 00:15:16,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6143, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6769, PETRI_PLACES=197, PETRI_TRANSITIONS=423} [2024-06-28 00:15:16,021 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 156 predicate places. [2024-06-28 00:15:16,021 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 423 transitions, 6769 flow [2024-06-28 00:15:16,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:15:16,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:15:16,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:15:16,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 00:15:16,021 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)] === [2024-06-28 00:15:16,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:15:16,022 INFO L85 PathProgramCache]: Analyzing trace with hash 2013604424, now seen corresponding path program 6 times [2024-06-28 00:15:16,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:15:16,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363455551] [2024-06-28 00:15:16,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:15:16,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:15:16,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:15:17,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:15:17,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:15:17,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363455551] [2024-06-28 00:15:17,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363455551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:15:17,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:15:17,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:15:17,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048217431] [2024-06-28 00:15:17,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:15:17,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:15:17,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:15:17,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:15:17,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:15:17,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:15:17,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 423 transitions, 6769 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:15:17,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:15:17,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:15:17,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:15:18,284 INFO L124 PetriNetUnfolderBase]: 2729/4057 cut-off events. [2024-06-28 00:15:18,284 INFO L125 PetriNetUnfolderBase]: For 112813/112816 co-relation queries the response was YES. [2024-06-28 00:15:18,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31281 conditions, 4057 events. 2729/4057 cut-off events. For 112813/112816 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 19898 event pairs, 934 based on Foata normal form. 6/4060 useless extension candidates. Maximal degree in co-relation 31183. Up to 3722 conditions per place. [2024-06-28 00:15:18,317 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 400 selfloop transitions, 87 changer transitions 0/490 dead transitions. [2024-06-28 00:15:18,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 490 transitions, 8689 flow [2024-06-28 00:15:18,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:15:18,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:15:18,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-28 00:15:18,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-28 00:15:18,318 INFO L175 Difference]: Start difference. First operand has 197 places, 423 transitions, 6769 flow. Second operand 8 states and 141 transitions. [2024-06-28 00:15:18,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 490 transitions, 8689 flow [2024-06-28 00:15:18,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 490 transitions, 8603 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-28 00:15:18,489 INFO L231 Difference]: Finished difference. Result has 204 places, 448 transitions, 7313 flow [2024-06-28 00:15:18,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6699, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7313, PETRI_PLACES=204, PETRI_TRANSITIONS=448} [2024-06-28 00:15:18,489 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 163 predicate places. [2024-06-28 00:15:18,489 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 448 transitions, 7313 flow [2024-06-28 00:15:18,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:15:18,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:15:18,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:15:18,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 00:15:18,490 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)] === [2024-06-28 00:15:18,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:15:18,490 INFO L85 PathProgramCache]: Analyzing trace with hash -266314760, now seen corresponding path program 7 times [2024-06-28 00:15:18,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:15:18,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339604698] [2024-06-28 00:15:18,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:15:18,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:15:18,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:15:19,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:15:19,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:15:19,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339604698] [2024-06-28 00:15:19,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339604698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:15:19,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:15:19,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:15:19,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818025771] [2024-06-28 00:15:19,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:15:19,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:15:19,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:15:19,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:15:19,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:15:19,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:15:19,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 448 transitions, 7313 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:15:19,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:15:19,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:15:19,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:15:20,754 INFO L124 PetriNetUnfolderBase]: 2705/4024 cut-off events. [2024-06-28 00:15:20,754 INFO L125 PetriNetUnfolderBase]: For 118305/118308 co-relation queries the response was YES. [2024-06-28 00:15:20,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31386 conditions, 4024 events. 2705/4024 cut-off events. For 118305/118308 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 19684 event pairs, 932 based on Foata normal form. 9/4030 useless extension candidates. Maximal degree in co-relation 31285. Up to 3705 conditions per place. [2024-06-28 00:15:20,800 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 399 selfloop transitions, 90 changer transitions 0/492 dead transitions. [2024-06-28 00:15:20,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 492 transitions, 8664 flow [2024-06-28 00:15:20,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:15:20,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:15:20,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-28 00:15:20,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-28 00:15:20,801 INFO L175 Difference]: Start difference. First operand has 204 places, 448 transitions, 7313 flow. Second operand 10 states and 165 transitions. [2024-06-28 00:15:20,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 492 transitions, 8664 flow [2024-06-28 00:15:21,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 492 transitions, 8514 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-28 00:15:21,045 INFO L231 Difference]: Finished difference. Result has 212 places, 448 transitions, 7386 flow [2024-06-28 00:15:21,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7163, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7386, PETRI_PLACES=212, PETRI_TRANSITIONS=448} [2024-06-28 00:15:21,046 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 171 predicate places. [2024-06-28 00:15:21,046 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 448 transitions, 7386 flow [2024-06-28 00:15:21,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:15:21,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:15:21,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:15:21,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 00:15:21,047 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)] === [2024-06-28 00:15:21,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:15:21,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1218559793, now seen corresponding path program 2 times [2024-06-28 00:15:21,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:15:21,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809484315] [2024-06-28 00:15:21,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:15:21,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:15:21,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:15:22,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:15:22,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:15:22,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809484315] [2024-06-28 00:15:22,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809484315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:15:22,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:15:22,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:15:22,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531068027] [2024-06-28 00:15:22,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:15:22,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:15:22,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:15:22,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:15:22,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:15:22,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:15:22,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 448 transitions, 7386 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:15:22,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:15:22,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:15:22,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:15:23,166 INFO L124 PetriNetUnfolderBase]: 2718/4038 cut-off events. [2024-06-28 00:15:23,167 INFO L125 PetriNetUnfolderBase]: For 128810/128813 co-relation queries the response was YES. [2024-06-28 00:15:23,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32197 conditions, 4038 events. 2718/4038 cut-off events. For 128810/128813 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 19747 event pairs, 965 based on Foata normal form. 7/4042 useless extension candidates. Maximal degree in co-relation 32093. Up to 3922 conditions per place. [2024-06-28 00:15:23,210 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 445 selfloop transitions, 26 changer transitions 0/474 dead transitions. [2024-06-28 00:15:23,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 474 transitions, 8558 flow [2024-06-28 00:15:23,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:15:23,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:15:23,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-28 00:15:23,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-28 00:15:23,212 INFO L175 Difference]: Start difference. First operand has 212 places, 448 transitions, 7386 flow. Second operand 6 states and 99 transitions. [2024-06-28 00:15:23,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 474 transitions, 8558 flow [2024-06-28 00:15:23,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 474 transitions, 8321 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-28 00:15:23,451 INFO L231 Difference]: Finished difference. Result has 210 places, 457 transitions, 7369 flow [2024-06-28 00:15:23,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7161, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7369, PETRI_PLACES=210, PETRI_TRANSITIONS=457} [2024-06-28 00:15:23,452 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 169 predicate places. [2024-06-28 00:15:23,452 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 457 transitions, 7369 flow [2024-06-28 00:15:23,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:15:23,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:15:23,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:15:23,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 00:15:23,452 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)] === [2024-06-28 00:15:23,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:15:23,453 INFO L85 PathProgramCache]: Analyzing trace with hash 109392450, now seen corresponding path program 8 times [2024-06-28 00:15:23,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:15:23,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861763712] [2024-06-28 00:15:23,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:15:23,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:15:23,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:15:24,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:15:24,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:15:24,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861763712] [2024-06-28 00:15:24,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861763712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:15:24,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:15:24,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:15:24,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556505391] [2024-06-28 00:15:24,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:15:24,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:15:24,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:15:24,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:15:24,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:15:24,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:15:24,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 457 transitions, 7369 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:15:24,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:15:24,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:15:24,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:15:25,451 INFO L124 PetriNetUnfolderBase]: 2743/4073 cut-off events. [2024-06-28 00:15:25,451 INFO L125 PetriNetUnfolderBase]: For 134627/134630 co-relation queries the response was YES. [2024-06-28 00:15:25,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32786 conditions, 4073 events. 2743/4073 cut-off events. For 134627/134630 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 19910 event pairs, 967 based on Foata normal form. 6/4076 useless extension candidates. Maximal degree in co-relation 32681. Up to 3974 conditions per place. [2024-06-28 00:15:25,494 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 456 selfloop transitions, 26 changer transitions 0/485 dead transitions. [2024-06-28 00:15:25,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 485 transitions, 8566 flow [2024-06-28 00:15:25,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:15:25,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:15:25,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-28 00:15:25,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3964285714285714 [2024-06-28 00:15:25,496 INFO L175 Difference]: Start difference. First operand has 210 places, 457 transitions, 7369 flow. Second operand 7 states and 111 transitions. [2024-06-28 00:15:25,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 485 transitions, 8566 flow [2024-06-28 00:15:25,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 485 transitions, 8486 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-28 00:15:25,742 INFO L231 Difference]: Finished difference. Result has 212 places, 466 transitions, 7508 flow [2024-06-28 00:15:25,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7289, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7508, PETRI_PLACES=212, PETRI_TRANSITIONS=466} [2024-06-28 00:15:25,742 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 171 predicate places. [2024-06-28 00:15:25,743 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 466 transitions, 7508 flow [2024-06-28 00:15:25,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:15:25,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:15:25,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:15:25,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 00:15:25,743 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)] === [2024-06-28 00:15:25,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:15:25,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1650990831, now seen corresponding path program 3 times [2024-06-28 00:15:25,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:15:25,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158334854] [2024-06-28 00:15:25,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:15:25,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:15:25,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:15:27,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:15:27,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:15:27,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158334854] [2024-06-28 00:15:27,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158334854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:15:27,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:15:27,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:15:27,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171249569] [2024-06-28 00:15:27,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:15:27,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:15:27,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:15:27,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:15:27,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:15:27,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:15:27,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 466 transitions, 7508 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:15:27,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:15:27,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:15:27,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:15:28,033 INFO L124 PetriNetUnfolderBase]: 2735/4070 cut-off events. [2024-06-28 00:15:28,033 INFO L125 PetriNetUnfolderBase]: For 134617/134620 co-relation queries the response was YES. [2024-06-28 00:15:28,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32651 conditions, 4070 events. 2735/4070 cut-off events. For 134617/134620 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 20003 event pairs, 941 based on Foata normal form. 3/4070 useless extension candidates. Maximal degree in co-relation 32546. Up to 3859 conditions per place. [2024-06-28 00:15:28,083 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 417 selfloop transitions, 62 changer transitions 0/482 dead transitions. [2024-06-28 00:15:28,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 482 transitions, 8545 flow [2024-06-28 00:15:28,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:15:28,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:15:28,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-28 00:15:28,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42916666666666664 [2024-06-28 00:15:28,085 INFO L175 Difference]: Start difference. First operand has 212 places, 466 transitions, 7508 flow. Second operand 6 states and 103 transitions. [2024-06-28 00:15:28,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 482 transitions, 8545 flow [2024-06-28 00:15:28,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 482 transitions, 8440 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-28 00:15:28,338 INFO L231 Difference]: Finished difference. Result has 213 places, 466 transitions, 7561 flow [2024-06-28 00:15:28,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7403, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7561, PETRI_PLACES=213, PETRI_TRANSITIONS=466} [2024-06-28 00:15:28,338 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 172 predicate places. [2024-06-28 00:15:28,338 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 466 transitions, 7561 flow [2024-06-28 00:15:28,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:15:28,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:15:28,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:15:28,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 00:15:28,339 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)] === [2024-06-28 00:15:28,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:15:28,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1650991048, now seen corresponding path program 9 times [2024-06-28 00:15:28,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:15:28,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290003037] [2024-06-28 00:15:28,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:15:28,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:15:28,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:15:29,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:15:29,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:15:29,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290003037] [2024-06-28 00:15:29,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290003037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:15:29,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:15:29,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:15:29,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317120319] [2024-06-28 00:15:29,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:15:29,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:15:29,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:15:29,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:15:29,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:15:29,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:15:29,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 466 transitions, 7561 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:15:29,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:15:29,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:15:29,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:15:30,578 INFO L124 PetriNetUnfolderBase]: 2787/4145 cut-off events. [2024-06-28 00:15:30,578 INFO L125 PetriNetUnfolderBase]: For 144401/144404 co-relation queries the response was YES. [2024-06-28 00:15:30,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33640 conditions, 4145 events. 2787/4145 cut-off events. For 144401/144404 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 20441 event pairs, 950 based on Foata normal form. 6/4148 useless extension candidates. Maximal degree in co-relation 33534. Up to 3830 conditions per place. [2024-06-28 00:15:30,623 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 441 selfloop transitions, 74 changer transitions 0/518 dead transitions. [2024-06-28 00:15:30,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 518 transitions, 9346 flow [2024-06-28 00:15:30,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:15:30,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:15:30,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-28 00:15:30,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-28 00:15:30,624 INFO L175 Difference]: Start difference. First operand has 213 places, 466 transitions, 7561 flow. Second operand 7 states and 124 transitions. [2024-06-28 00:15:30,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 518 transitions, 9346 flow [2024-06-28 00:15:30,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 518 transitions, 9196 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-28 00:15:30,906 INFO L231 Difference]: Finished difference. Result has 216 places, 479 transitions, 7857 flow [2024-06-28 00:15:30,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7427, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7857, PETRI_PLACES=216, PETRI_TRANSITIONS=479} [2024-06-28 00:15:30,907 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 175 predicate places. [2024-06-28 00:15:30,907 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 479 transitions, 7857 flow [2024-06-28 00:15:30,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:15:30,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:15:30,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:15:30,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 00:15:30,908 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)] === [2024-06-28 00:15:30,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:15:30,908 INFO L85 PathProgramCache]: Analyzing trace with hash 109185060, now seen corresponding path program 10 times [2024-06-28 00:15:30,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:15:30,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545397771] [2024-06-28 00:15:30,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:15:30,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:15:30,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:15:32,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:15:32,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:15:32,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545397771] [2024-06-28 00:15:32,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545397771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:15:32,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:15:32,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:15:32,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571500100] [2024-06-28 00:15:32,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:15:32,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:15:32,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:15:32,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:15:32,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:15:32,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:15:32,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 479 transitions, 7857 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:15:32,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:15:32,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:15:32,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:15:33,036 INFO L124 PetriNetUnfolderBase]: 2776/4131 cut-off events. [2024-06-28 00:15:33,036 INFO L125 PetriNetUnfolderBase]: For 135545/135548 co-relation queries the response was YES. [2024-06-28 00:15:33,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33287 conditions, 4131 events. 2776/4131 cut-off events. For 135545/135548 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 20401 event pairs, 944 based on Foata normal form. 4/4132 useless extension candidates. Maximal degree in co-relation 33181. Up to 3916 conditions per place. [2024-06-28 00:15:33,078 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 433 selfloop transitions, 72 changer transitions 0/508 dead transitions. [2024-06-28 00:15:33,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 508 transitions, 9071 flow [2024-06-28 00:15:33,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:15:33,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:15:33,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-28 00:15:33,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-28 00:15:33,080 INFO L175 Difference]: Start difference. First operand has 216 places, 479 transitions, 7857 flow. Second operand 7 states and 118 transitions. [2024-06-28 00:15:33,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 508 transitions, 9071 flow [2024-06-28 00:15:33,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 508 transitions, 8881 flow, removed 59 selfloop flow, removed 3 redundant places. [2024-06-28 00:15:33,347 INFO L231 Difference]: Finished difference. Result has 220 places, 485 transitions, 7889 flow [2024-06-28 00:15:33,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7667, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7889, PETRI_PLACES=220, PETRI_TRANSITIONS=485} [2024-06-28 00:15:33,348 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 179 predicate places. [2024-06-28 00:15:33,348 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 485 transitions, 7889 flow [2024-06-28 00:15:33,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:15:33,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:15:33,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:15:33,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 00:15:33,348 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)] === [2024-06-28 00:15:33,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:15:33,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1226184305, now seen corresponding path program 5 times [2024-06-28 00:15:33,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:15:33,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213898345] [2024-06-28 00:15:33,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:15:33,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:15:33,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:15:34,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:15:34,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:15:34,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213898345] [2024-06-28 00:15:34,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213898345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:15:34,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:15:34,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:15:34,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906698934] [2024-06-28 00:15:34,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:15:34,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:15:34,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:15:34,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:15:34,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:15:34,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:15:34,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 485 transitions, 7889 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:15:34,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:15:34,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:15:34,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:15:35,913 INFO L124 PetriNetUnfolderBase]: 2740/4109 cut-off events. [2024-06-28 00:15:35,913 INFO L125 PetriNetUnfolderBase]: For 155103/155167 co-relation queries the response was YES. [2024-06-28 00:15:35,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33584 conditions, 4109 events. 2740/4109 cut-off events. For 155103/155167 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 20587 event pairs, 855 based on Foata normal form. 8/3998 useless extension candidates. Maximal degree in co-relation 33477. Up to 3558 conditions per place. [2024-06-28 00:15:35,958 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 358 selfloop transitions, 91 changer transitions 0/536 dead transitions. [2024-06-28 00:15:35,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 536 transitions, 9421 flow [2024-06-28 00:15:35,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:15:35,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:15:35,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-28 00:15:35,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-28 00:15:35,960 INFO L175 Difference]: Start difference. First operand has 220 places, 485 transitions, 7889 flow. Second operand 8 states and 142 transitions. [2024-06-28 00:15:35,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 536 transitions, 9421 flow [2024-06-28 00:15:36,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 536 transitions, 9322 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-28 00:15:36,225 INFO L231 Difference]: Finished difference. Result has 227 places, 503 transitions, 8372 flow [2024-06-28 00:15:36,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7790, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8372, PETRI_PLACES=227, PETRI_TRANSITIONS=503} [2024-06-28 00:15:36,225 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 186 predicate places. [2024-06-28 00:15:36,225 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 503 transitions, 8372 flow [2024-06-28 00:15:36,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:15:36,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:15:36,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:15:36,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 00:15:36,226 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:15:36,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:15:36,226 INFO L85 PathProgramCache]: Analyzing trace with hash 731617954, now seen corresponding path program 1 times [2024-06-28 00:15:36,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:15:36,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984148598] [2024-06-28 00:15:36,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:15:36,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:15:36,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:15:37,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:15:37,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:15:37,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984148598] [2024-06-28 00:15:37,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984148598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:15:37,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:15:37,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:15:37,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482251505] [2024-06-28 00:15:37,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:15:37,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:15:37,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:15:37,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:15:37,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:15:37,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:15:37,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 503 transitions, 8372 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:15:37,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:15:37,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:15:37,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:15:38,666 INFO L124 PetriNetUnfolderBase]: 2763/4113 cut-off events. [2024-06-28 00:15:38,666 INFO L125 PetriNetUnfolderBase]: For 156140/156301 co-relation queries the response was YES. [2024-06-28 00:15:38,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33989 conditions, 4113 events. 2763/4113 cut-off events. For 156140/156301 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 20373 event pairs, 927 based on Foata normal form. 136/4217 useless extension candidates. Maximal degree in co-relation 33878. Up to 3907 conditions per place. [2024-06-28 00:15:38,712 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 456 selfloop transitions, 17 changer transitions 0/511 dead transitions. [2024-06-28 00:15:38,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 511 transitions, 9352 flow [2024-06-28 00:15:38,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:15:38,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:15:38,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-06-28 00:15:38,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42 [2024-06-28 00:15:38,713 INFO L175 Difference]: Start difference. First operand has 227 places, 503 transitions, 8372 flow. Second operand 5 states and 84 transitions. [2024-06-28 00:15:38,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 511 transitions, 9352 flow [2024-06-28 00:15:38,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 511 transitions, 8956 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-28 00:15:39,007 INFO L231 Difference]: Finished difference. Result has 224 places, 503 transitions, 8021 flow [2024-06-28 00:15:39,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7976, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=8021, PETRI_PLACES=224, PETRI_TRANSITIONS=503} [2024-06-28 00:15:39,008 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 183 predicate places. [2024-06-28 00:15:39,008 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 503 transitions, 8021 flow [2024-06-28 00:15:39,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:15:39,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:15:39,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:15:39,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 00:15:39,008 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)] === [2024-06-28 00:15:39,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:15:39,009 INFO L85 PathProgramCache]: Analyzing trace with hash -252327069, now seen corresponding path program 1 times [2024-06-28 00:15:39,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:15:39,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592889058] [2024-06-28 00:15:39,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:15:39,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:15:39,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:15:40,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:15:40,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:15:40,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592889058] [2024-06-28 00:15:40,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592889058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:15:40,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:15:40,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:15:40,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304934937] [2024-06-28 00:15:40,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:15:40,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:15:40,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:15:40,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:15:40,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:15:40,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 00:15:40,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 503 transitions, 8021 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:15:40,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:15:40,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 00:15:40,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:15:42,239 INFO L124 PetriNetUnfolderBase]: 2663/4005 cut-off events. [2024-06-28 00:15:42,239 INFO L125 PetriNetUnfolderBase]: For 169277/169347 co-relation queries the response was YES. [2024-06-28 00:15:42,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33322 conditions, 4005 events. 2663/4005 cut-off events. For 169277/169347 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 20111 event pairs, 596 based on Foata normal form. 8/3895 useless extension candidates. Maximal degree in co-relation 33211. Up to 2797 conditions per place. [2024-06-28 00:15:42,286 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 224 selfloop transitions, 189 changer transitions 0/543 dead transitions. [2024-06-28 00:15:42,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 543 transitions, 9219 flow [2024-06-28 00:15:42,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:15:42,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:15:42,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-28 00:15:42,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48055555555555557 [2024-06-28 00:15:42,287 INFO L175 Difference]: Start difference. First operand has 224 places, 503 transitions, 8021 flow. Second operand 9 states and 173 transitions. [2024-06-28 00:15:42,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 543 transitions, 9219 flow [2024-06-28 00:15:42,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 543 transitions, 9194 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 00:15:42,591 INFO L231 Difference]: Finished difference. Result has 230 places, 505 transitions, 8402 flow [2024-06-28 00:15:42,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7996, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8402, PETRI_PLACES=230, PETRI_TRANSITIONS=505} [2024-06-28 00:15:42,591 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 189 predicate places. [2024-06-28 00:15:42,592 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 505 transitions, 8402 flow [2024-06-28 00:15:42,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:15:42,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:15:42,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:15:42,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 00:15:42,592 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)] === [2024-06-28 00:15:42,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:15:42,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1043833619, now seen corresponding path program 2 times [2024-06-28 00:15:42,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:15:42,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044635285] [2024-06-28 00:15:42,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:15:42,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:15:42,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:15:44,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:15:44,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:15:44,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044635285] [2024-06-28 00:15:44,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044635285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:15:44,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:15:44,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:15:44,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79301787] [2024-06-28 00:15:44,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:15:44,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:15:44,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:15:44,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:15:44,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:15:44,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:15:44,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 505 transitions, 8402 flow. Second operand has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:15:44,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:15:44,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:15:44,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:15:45,423 INFO L124 PetriNetUnfolderBase]: 2389/3757 cut-off events. [2024-06-28 00:15:45,423 INFO L125 PetriNetUnfolderBase]: For 165473/165579 co-relation queries the response was YES. [2024-06-28 00:15:45,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32316 conditions, 3757 events. 2389/3757 cut-off events. For 165473/165579 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 20341 event pairs, 296 based on Foata normal form. 15/3599 useless extension candidates. Maximal degree in co-relation 32203. Up to 1755 conditions per place. [2024-06-28 00:15:45,461 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 206 selfloop transitions, 168 changer transitions 0/557 dead transitions. [2024-06-28 00:15:45,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 557 transitions, 9772 flow [2024-06-28 00:15:45,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:15:45,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:15:45,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-28 00:15:45,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546875 [2024-06-28 00:15:45,462 INFO L175 Difference]: Start difference. First operand has 230 places, 505 transitions, 8402 flow. Second operand 8 states and 175 transitions. [2024-06-28 00:15:45,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 557 transitions, 9772 flow [2024-06-28 00:15:45,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 557 transitions, 9392 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-28 00:15:45,753 INFO L231 Difference]: Finished difference. Result has 235 places, 516 transitions, 8742 flow [2024-06-28 00:15:45,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8022, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8742, PETRI_PLACES=235, PETRI_TRANSITIONS=516} [2024-06-28 00:15:45,753 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 194 predicate places. [2024-06-28 00:15:45,753 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 516 transitions, 8742 flow [2024-06-28 00:15:45,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:15:45,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:15:45,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:15:45,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 00:15:45,754 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)] === [2024-06-28 00:15:45,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:15:45,754 INFO L85 PathProgramCache]: Analyzing trace with hash -2037673641, now seen corresponding path program 1 times [2024-06-28 00:15:45,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:15:45,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182238888] [2024-06-28 00:15:45,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:15:45,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:15:45,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:15:47,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:15:47,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:15:47,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182238888] [2024-06-28 00:15:47,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182238888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:15:47,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:15:47,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:15:47,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9252147] [2024-06-28 00:15:47,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:15:47,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:15:47,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:15:47,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:15:47,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:15:47,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:15:47,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 516 transitions, 8742 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:15:47,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:15:47,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:15:47,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:15:49,114 INFO L124 PetriNetUnfolderBase]: 3013/4507 cut-off events. [2024-06-28 00:15:49,114 INFO L125 PetriNetUnfolderBase]: For 203388/203465 co-relation queries the response was YES. [2024-06-28 00:15:49,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39562 conditions, 4507 events. 3013/4507 cut-off events. For 203388/203465 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 23207 event pairs, 698 based on Foata normal form. 6/4447 useless extension candidates. Maximal degree in co-relation 39444. Up to 3171 conditions per place. [2024-06-28 00:15:49,168 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 339 selfloop transitions, 224 changer transitions 0/609 dead transitions. [2024-06-28 00:15:49,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 609 transitions, 10869 flow [2024-06-28 00:15:49,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:15:49,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:15:49,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-28 00:15:49,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-28 00:15:49,170 INFO L175 Difference]: Start difference. First operand has 235 places, 516 transitions, 8742 flow. Second operand 9 states and 171 transitions. [2024-06-28 00:15:49,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 609 transitions, 10869 flow [2024-06-28 00:15:49,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 609 transitions, 10765 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-28 00:15:49,501 INFO L231 Difference]: Finished difference. Result has 244 places, 563 transitions, 9907 flow [2024-06-28 00:15:49,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8647, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9907, PETRI_PLACES=244, PETRI_TRANSITIONS=563} [2024-06-28 00:15:49,503 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 203 predicate places. [2024-06-28 00:15:49,504 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 563 transitions, 9907 flow [2024-06-28 00:15:49,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:15:49,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:15:49,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:15:49,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 00:15:49,504 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)] === [2024-06-28 00:15:49,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:15:49,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1446063781, now seen corresponding path program 3 times [2024-06-28 00:15:49,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:15:49,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879475090] [2024-06-28 00:15:49,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:15:49,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:15:49,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:15:51,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:15:51,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:15:51,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879475090] [2024-06-28 00:15:51,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879475090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:15:51,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:15:51,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:15:51,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859679747] [2024-06-28 00:15:51,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:15:51,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:15:51,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:15:51,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:15:51,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:15:51,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 00:15:51,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 563 transitions, 9907 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:15:51,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:15:51,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 00:15:51,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:15:52,827 INFO L124 PetriNetUnfolderBase]: 3105/4653 cut-off events. [2024-06-28 00:15:52,827 INFO L125 PetriNetUnfolderBase]: For 227034/227089 co-relation queries the response was YES. [2024-06-28 00:15:52,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41678 conditions, 4653 events. 3105/4653 cut-off events. For 227034/227089 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 23904 event pairs, 477 based on Foata normal form. 34/4575 useless extension candidates. Maximal degree in co-relation 41556. Up to 3048 conditions per place. [2024-06-28 00:15:52,877 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 302 selfloop transitions, 225 changer transitions 0/624 dead transitions. [2024-06-28 00:15:52,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 624 transitions, 11669 flow [2024-06-28 00:15:52,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:15:52,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:15:52,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-28 00:15:52,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.559375 [2024-06-28 00:15:52,878 INFO L175 Difference]: Start difference. First operand has 244 places, 563 transitions, 9907 flow. Second operand 8 states and 179 transitions. [2024-06-28 00:15:52,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 624 transitions, 11669 flow [2024-06-28 00:15:53,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 624 transitions, 11521 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-28 00:15:53,246 INFO L231 Difference]: Finished difference. Result has 249 places, 571 transitions, 10390 flow [2024-06-28 00:15:53,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9767, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10390, PETRI_PLACES=249, PETRI_TRANSITIONS=571} [2024-06-28 00:15:53,247 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 208 predicate places. [2024-06-28 00:15:53,247 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 571 transitions, 10390 flow [2024-06-28 00:15:53,247 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) [2024-06-28 00:15:53,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:15:53,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:15:53,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 00:15:53,247 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)] === [2024-06-28 00:15:53,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:15:53,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1446124231, now seen corresponding path program 4 times [2024-06-28 00:15:53,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:15:53,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104472841] [2024-06-28 00:15:53,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:15:53,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:15:53,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:15:55,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:15:55,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:15:55,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104472841] [2024-06-28 00:15:55,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104472841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:15:55,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:15:55,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:15:55,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244051443] [2024-06-28 00:15:55,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:15:55,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:15:55,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:15:55,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:15:55,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:15:55,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 00:15:55,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 571 transitions, 10390 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:15:55,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:15:55,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 00:15:55,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:15:56,572 INFO L124 PetriNetUnfolderBase]: 3182/4787 cut-off events. [2024-06-28 00:15:56,573 INFO L125 PetriNetUnfolderBase]: For 235394/235510 co-relation queries the response was YES. [2024-06-28 00:15:56,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43778 conditions, 4787 events. 3182/4787 cut-off events. For 235394/235510 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 24964 event pairs, 673 based on Foata normal form. 37/4707 useless extension candidates. Maximal degree in co-relation 43655. Up to 3540 conditions per place. [2024-06-28 00:15:56,628 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 301 selfloop transitions, 224 changer transitions 0/622 dead transitions. [2024-06-28 00:15:56,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 622 transitions, 11945 flow [2024-06-28 00:15:56,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:15:56,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:15:56,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-28 00:15:56,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54375 [2024-06-28 00:15:56,629 INFO L175 Difference]: Start difference. First operand has 249 places, 571 transitions, 10390 flow. Second operand 8 states and 174 transitions. [2024-06-28 00:15:56,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 622 transitions, 11945 flow [2024-06-28 00:15:56,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 622 transitions, 11590 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-28 00:15:57,006 INFO L231 Difference]: Finished difference. Result has 253 places, 574 transitions, 10557 flow [2024-06-28 00:15:57,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10043, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10557, PETRI_PLACES=253, PETRI_TRANSITIONS=574} [2024-06-28 00:15:57,006 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 212 predicate places. [2024-06-28 00:15:57,007 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 574 transitions, 10557 flow [2024-06-28 00:15:57,007 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) [2024-06-28 00:15:57,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:15:57,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:15:57,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 00:15:57,007 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)] === [2024-06-28 00:15:57,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:15:57,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1446124355, now seen corresponding path program 2 times [2024-06-28 00:15:57,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:15:57,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734217145] [2024-06-28 00:15:57,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:15:57,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:15:57,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:15:58,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:15:58,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:15:58,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734217145] [2024-06-28 00:15:58,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734217145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:15:58,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:15:58,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:15:58,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658412038] [2024-06-28 00:15:58,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:15:58,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:15:58,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:15:58,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:15:58,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:15:58,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:15:58,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 574 transitions, 10557 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:15:58,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:15:58,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:15:58,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:15:59,938 INFO L124 PetriNetUnfolderBase]: 3366/5028 cut-off events. [2024-06-28 00:15:59,938 INFO L125 PetriNetUnfolderBase]: For 223436/223446 co-relation queries the response was YES. [2024-06-28 00:15:59,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45707 conditions, 5028 events. 3366/5028 cut-off events. For 223436/223446 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 26118 event pairs, 889 based on Foata normal form. 12/5037 useless extension candidates. Maximal degree in co-relation 45582. Up to 3832 conditions per place. [2024-06-28 00:16:00,003 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 386 selfloop transitions, 251 changer transitions 0/640 dead transitions. [2024-06-28 00:16:00,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 640 transitions, 12679 flow [2024-06-28 00:16:00,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:16:00,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:16:00,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-28 00:16:00,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-06-28 00:16:00,005 INFO L175 Difference]: Start difference. First operand has 253 places, 574 transitions, 10557 flow. Second operand 8 states and 164 transitions. [2024-06-28 00:16:00,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 640 transitions, 12679 flow [2024-06-28 00:16:00,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 640 transitions, 12200 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-28 00:16:00,430 INFO L231 Difference]: Finished difference. Result has 258 places, 591 transitions, 11116 flow [2024-06-28 00:16:00,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10098, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11116, PETRI_PLACES=258, PETRI_TRANSITIONS=591} [2024-06-28 00:16:00,431 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 217 predicate places. [2024-06-28 00:16:00,431 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 591 transitions, 11116 flow [2024-06-28 00:16:00,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:16:00,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:16:00,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:16:00,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 00:16:00,432 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)] === [2024-06-28 00:16:00,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:16:00,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1786971731, now seen corresponding path program 3 times [2024-06-28 00:16:00,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:16:00,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697366415] [2024-06-28 00:16:00,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:16:00,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:16:00,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:16:02,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:16:02,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:16:02,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697366415] [2024-06-28 00:16:02,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697366415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:16:02,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:16:02,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:16:02,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772479912] [2024-06-28 00:16:02,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:16:02,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:16:02,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:16:02,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:16:02,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:16:02,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:16:02,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 591 transitions, 11116 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:16:02,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:16:02,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:16:02,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:16:03,708 INFO L124 PetriNetUnfolderBase]: 3431/5123 cut-off events. [2024-06-28 00:16:03,708 INFO L125 PetriNetUnfolderBase]: For 237671/237685 co-relation queries the response was YES. [2024-06-28 00:16:03,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47449 conditions, 5123 events. 3431/5123 cut-off events. For 237671/237685 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 26675 event pairs, 919 based on Foata normal form. 16/5136 useless extension candidates. Maximal degree in co-relation 47320. Up to 4272 conditions per place. [2024-06-28 00:16:03,769 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 405 selfloop transitions, 240 changer transitions 0/648 dead transitions. [2024-06-28 00:16:03,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 648 transitions, 13232 flow [2024-06-28 00:16:03,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:16:03,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:16:03,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-28 00:16:03,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.496875 [2024-06-28 00:16:03,770 INFO L175 Difference]: Start difference. First operand has 258 places, 591 transitions, 11116 flow. Second operand 8 states and 159 transitions. [2024-06-28 00:16:03,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 648 transitions, 13232 flow [2024-06-28 00:16:04,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 648 transitions, 12900 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-28 00:16:04,223 INFO L231 Difference]: Finished difference. Result has 263 places, 603 transitions, 11500 flow [2024-06-28 00:16:04,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10808, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11500, PETRI_PLACES=263, PETRI_TRANSITIONS=603} [2024-06-28 00:16:04,223 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 222 predicate places. [2024-06-28 00:16:04,223 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 603 transitions, 11500 flow [2024-06-28 00:16:04,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:16:04,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:16:04,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:16:04,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 00:16:04,224 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)] === [2024-06-28 00:16:04,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:16:04,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1448920741, now seen corresponding path program 5 times [2024-06-28 00:16:04,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:16:04,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336034803] [2024-06-28 00:16:04,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:16:04,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:16:04,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:16:05,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:16:05,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:16:05,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336034803] [2024-06-28 00:16:05,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336034803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:16:05,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:16:05,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:16:05,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598144839] [2024-06-28 00:16:05,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:16:05,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:16:05,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:16:05,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:16:05,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:16:05,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 00:16:05,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 603 transitions, 11500 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:16:05,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:16:05,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 00:16:05,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:16:07,340 INFO L124 PetriNetUnfolderBase]: 3368/5076 cut-off events. [2024-06-28 00:16:07,341 INFO L125 PetriNetUnfolderBase]: For 272534/272595 co-relation queries the response was YES. [2024-06-28 00:16:07,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47565 conditions, 5076 events. 3368/5076 cut-off events. For 272534/272595 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 26842 event pairs, 715 based on Foata normal form. 40/5001 useless extension candidates. Maximal degree in co-relation 47435. Up to 4061 conditions per place. [2024-06-28 00:16:07,410 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 355 selfloop transitions, 194 changer transitions 0/656 dead transitions. [2024-06-28 00:16:07,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 656 transitions, 13254 flow [2024-06-28 00:16:07,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:16:07,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:16:07,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-28 00:16:07,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.534375 [2024-06-28 00:16:07,411 INFO L175 Difference]: Start difference. First operand has 263 places, 603 transitions, 11500 flow. Second operand 8 states and 171 transitions. [2024-06-28 00:16:07,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 656 transitions, 13254 flow [2024-06-28 00:16:08,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 656 transitions, 12750 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-28 00:16:08,011 INFO L231 Difference]: Finished difference. Result has 266 places, 606 transitions, 11453 flow [2024-06-28 00:16:08,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10996, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11453, PETRI_PLACES=266, PETRI_TRANSITIONS=606} [2024-06-28 00:16:08,011 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 225 predicate places. [2024-06-28 00:16:08,011 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 606 transitions, 11453 flow [2024-06-28 00:16:08,012 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) [2024-06-28 00:16:08,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:16:08,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:16:08,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 00:16:08,012 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)] === [2024-06-28 00:16:08,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:16:08,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1448920865, now seen corresponding path program 4 times [2024-06-28 00:16:08,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:16:08,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847513105] [2024-06-28 00:16:08,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:16:08,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:16:08,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:16:09,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:16:09,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:16:09,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847513105] [2024-06-28 00:16:09,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847513105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:16:09,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:16:09,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:16:09,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250096133] [2024-06-28 00:16:09,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:16:09,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:16:09,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:16:09,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:16:09,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:16:09,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:16:09,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 606 transitions, 11453 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:16:09,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:16:09,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:16:09,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:16:11,059 INFO L124 PetriNetUnfolderBase]: 3563/5331 cut-off events. [2024-06-28 00:16:11,059 INFO L125 PetriNetUnfolderBase]: For 261810/261824 co-relation queries the response was YES. [2024-06-28 00:16:11,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49418 conditions, 5331 events. 3563/5331 cut-off events. For 261810/261824 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 28078 event pairs, 935 based on Foata normal form. 16/5344 useless extension candidates. Maximal degree in co-relation 49287. Up to 4412 conditions per place. [2024-06-28 00:16:11,134 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 417 selfloop transitions, 244 changer transitions 0/664 dead transitions. [2024-06-28 00:16:11,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 664 transitions, 13591 flow [2024-06-28 00:16:11,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:16:11,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:16:11,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-28 00:16:11,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50625 [2024-06-28 00:16:11,136 INFO L175 Difference]: Start difference. First operand has 266 places, 606 transitions, 11453 flow. Second operand 8 states and 162 transitions. [2024-06-28 00:16:11,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 664 transitions, 13591 flow [2024-06-28 00:16:11,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 664 transitions, 13239 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-28 00:16:11,768 INFO L231 Difference]: Finished difference. Result has 270 places, 616 transitions, 11791 flow [2024-06-28 00:16:11,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11105, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11791, PETRI_PLACES=270, PETRI_TRANSITIONS=616} [2024-06-28 00:16:11,771 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 229 predicate places. [2024-06-28 00:16:11,772 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 616 transitions, 11791 flow [2024-06-28 00:16:11,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:16:11,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:16:11,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:16:11,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 00:16:11,773 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)] === [2024-06-28 00:16:11,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:16:11,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1448925701, now seen corresponding path program 1 times [2024-06-28 00:16:11,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:16:11,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413130680] [2024-06-28 00:16:11,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:16:11,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:16:11,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:16:13,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:16:13,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:16:13,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413130680] [2024-06-28 00:16:13,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413130680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:16:13,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:16:13,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:16:13,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46418374] [2024-06-28 00:16:13,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:16:13,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:16:13,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:16:13,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:16:13,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:16:13,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:16:13,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 616 transitions, 11791 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:16:13,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:16:13,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:16:13,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:16:14,904 INFO L124 PetriNetUnfolderBase]: 3682/5497 cut-off events. [2024-06-28 00:16:14,904 INFO L125 PetriNetUnfolderBase]: For 279039/279053 co-relation queries the response was YES. [2024-06-28 00:16:14,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51636 conditions, 5497 events. 3682/5497 cut-off events. For 279039/279053 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 28930 event pairs, 960 based on Foata normal form. 13/5507 useless extension candidates. Maximal degree in co-relation 51503. Up to 4709 conditions per place. [2024-06-28 00:16:14,977 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 428 selfloop transitions, 260 changer transitions 0/691 dead transitions. [2024-06-28 00:16:14,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 691 transitions, 14299 flow [2024-06-28 00:16:14,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:16:14,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:16:14,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-28 00:16:14,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-28 00:16:14,979 INFO L175 Difference]: Start difference. First operand has 270 places, 616 transitions, 11791 flow. Second operand 8 states and 152 transitions. [2024-06-28 00:16:14,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 691 transitions, 14299 flow [2024-06-28 00:16:15,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 691 transitions, 13952 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-28 00:16:15,570 INFO L231 Difference]: Finished difference. Result has 276 places, 656 transitions, 12919 flow [2024-06-28 00:16:15,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11483, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12919, PETRI_PLACES=276, PETRI_TRANSITIONS=656} [2024-06-28 00:16:15,571 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 235 predicate places. [2024-06-28 00:16:15,571 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 656 transitions, 12919 flow [2024-06-28 00:16:15,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:16:15,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:16:15,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:16:15,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 00:16:15,571 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)] === [2024-06-28 00:16:15,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:16:15,572 INFO L85 PathProgramCache]: Analyzing trace with hash 2060806621, now seen corresponding path program 2 times [2024-06-28 00:16:15,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:16:15,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317204652] [2024-06-28 00:16:15,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:16:15,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:16:15,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:16:17,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:16:17,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:16:17,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317204652] [2024-06-28 00:16:17,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317204652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:16:17,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:16:17,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:16:17,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72992412] [2024-06-28 00:16:17,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:16:17,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:16:17,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:16:17,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:16:17,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:16:17,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:16:17,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 656 transitions, 12919 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:16:17,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:16:17,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:16:17,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:16:18,904 INFO L124 PetriNetUnfolderBase]: 3723/5557 cut-off events. [2024-06-28 00:16:18,904 INFO L125 PetriNetUnfolderBase]: For 290956/290974 co-relation queries the response was YES. [2024-06-28 00:16:18,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53743 conditions, 5557 events. 3723/5557 cut-off events. For 290956/290974 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 29319 event pairs, 871 based on Foata normal form. 18/5572 useless extension candidates. Maximal degree in co-relation 53606. Up to 4755 conditions per place. [2024-06-28 00:16:18,968 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 437 selfloop transitions, 274 changer transitions 0/714 dead transitions. [2024-06-28 00:16:18,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 714 transitions, 15381 flow [2024-06-28 00:16:18,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:16:18,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:16:18,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-28 00:16:18,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48125 [2024-06-28 00:16:18,969 INFO L175 Difference]: Start difference. First operand has 276 places, 656 transitions, 12919 flow. Second operand 8 states and 154 transitions. [2024-06-28 00:16:18,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 714 transitions, 15381 flow [2024-06-28 00:16:19,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 714 transitions, 15194 flow, removed 53 selfloop flow, removed 3 redundant places. [2024-06-28 00:16:19,574 INFO L231 Difference]: Finished difference. Result has 282 places, 678 transitions, 13808 flow [2024-06-28 00:16:19,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12758, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13808, PETRI_PLACES=282, PETRI_TRANSITIONS=678} [2024-06-28 00:16:19,575 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 241 predicate places. [2024-06-28 00:16:19,575 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 678 transitions, 13808 flow [2024-06-28 00:16:19,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:16:19,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:16:19,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:16:19,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 00:16:19,575 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)] === [2024-06-28 00:16:19,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:16:19,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1176883045, now seen corresponding path program 6 times [2024-06-28 00:16:19,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:16:19,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088738229] [2024-06-28 00:16:19,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:16:19,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:16:19,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:16:21,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:16:21,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:16:21,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088738229] [2024-06-28 00:16:21,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088738229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:16:21,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:16:21,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:16:21,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612837287] [2024-06-28 00:16:21,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:16:21,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:16:21,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:16:21,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:16:21,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:16:21,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 00:16:21,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 678 transitions, 13808 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:16:21,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:16:21,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 00:16:21,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:16:23,296 INFO L124 PetriNetUnfolderBase]: 3666/5535 cut-off events. [2024-06-28 00:16:23,296 INFO L125 PetriNetUnfolderBase]: For 338277/338311 co-relation queries the response was YES. [2024-06-28 00:16:23,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54899 conditions, 5535 events. 3666/5535 cut-off events. For 338277/338311 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 29832 event pairs, 912 based on Foata normal form. 23/5413 useless extension candidates. Maximal degree in co-relation 54759. Up to 4756 conditions per place. [2024-06-28 00:16:23,382 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 488 selfloop transitions, 112 changer transitions 0/731 dead transitions. [2024-06-28 00:16:23,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 731 transitions, 15720 flow [2024-06-28 00:16:23,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:16:23,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:16:23,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-28 00:16:23,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.521875 [2024-06-28 00:16:23,383 INFO L175 Difference]: Start difference. First operand has 282 places, 678 transitions, 13808 flow. Second operand 8 states and 167 transitions. [2024-06-28 00:16:23,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 731 transitions, 15720 flow [2024-06-28 00:16:24,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 731 transitions, 15376 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-28 00:16:24,127 INFO L231 Difference]: Finished difference. Result has 287 places, 689 transitions, 13946 flow [2024-06-28 00:16:24,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13470, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13946, PETRI_PLACES=287, PETRI_TRANSITIONS=689} [2024-06-28 00:16:24,128 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 246 predicate places. [2024-06-28 00:16:24,128 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 689 transitions, 13946 flow [2024-06-28 00:16:24,128 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) [2024-06-28 00:16:24,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:16:24,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:16:24,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 00:16:24,129 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)] === [2024-06-28 00:16:24,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:16:24,129 INFO L85 PathProgramCache]: Analyzing trace with hash 351868471, now seen corresponding path program 1 times [2024-06-28 00:16:24,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:16:24,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004159762] [2024-06-28 00:16:24,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:16:24,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:16:24,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:16:25,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:16:25,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:16:25,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004159762] [2024-06-28 00:16:25,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004159762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:16:25,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:16:25,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:16:25,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067808042] [2024-06-28 00:16:25,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:16:25,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:16:25,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:16:25,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:16:25,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:16:26,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:16:26,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 689 transitions, 13946 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:16:26,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:16:26,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:16:26,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:16:27,867 INFO L124 PetriNetUnfolderBase]: 3848/5759 cut-off events. [2024-06-28 00:16:27,867 INFO L125 PetriNetUnfolderBase]: For 312641/312647 co-relation queries the response was YES. [2024-06-28 00:16:27,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56397 conditions, 5759 events. 3848/5759 cut-off events. For 312641/312647 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 30735 event pairs, 1032 based on Foata normal form. 6/5762 useless extension candidates. Maximal degree in co-relation 56255. Up to 5467 conditions per place. [2024-06-28 00:16:27,937 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 642 selfloop transitions, 75 changer transitions 0/720 dead transitions. [2024-06-28 00:16:27,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 720 transitions, 15608 flow [2024-06-28 00:16:27,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:16:27,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:16:27,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-28 00:16:27,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-28 00:16:27,938 INFO L175 Difference]: Start difference. First operand has 287 places, 689 transitions, 13946 flow. Second operand 8 states and 140 transitions. [2024-06-28 00:16:27,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 720 transitions, 15608 flow [2024-06-28 00:16:28,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 720 transitions, 15430 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-28 00:16:28,634 INFO L231 Difference]: Finished difference. Result has 291 places, 691 transitions, 13964 flow [2024-06-28 00:16:28,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13768, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13964, PETRI_PLACES=291, PETRI_TRANSITIONS=691} [2024-06-28 00:16:28,635 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 250 predicate places. [2024-06-28 00:16:28,635 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 691 transitions, 13964 flow [2024-06-28 00:16:28,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:16:28,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:16:28,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:16:28,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 00:16:28,635 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:16:28,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:16:28,636 INFO L85 PathProgramCache]: Analyzing trace with hash 351688733, now seen corresponding path program 3 times [2024-06-28 00:16:28,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:16:28,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155273539] [2024-06-28 00:16:28,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:16:28,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:16:28,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:16:30,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:16:30,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:16:30,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155273539] [2024-06-28 00:16:30,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155273539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:16:30,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:16:30,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:16:30,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746898870] [2024-06-28 00:16:30,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:16:30,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:16:30,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:16:30,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:16:30,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:16:30,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:16:30,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 691 transitions, 13964 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:16:30,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:16:30,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:16:30,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:16:31,989 INFO L124 PetriNetUnfolderBase]: 3887/5812 cut-off events. [2024-06-28 00:16:31,989 INFO L125 PetriNetUnfolderBase]: For 323179/323185 co-relation queries the response was YES. [2024-06-28 00:16:32,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57115 conditions, 5812 events. 3887/5812 cut-off events. For 323179/323185 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 31017 event pairs, 1030 based on Foata normal form. 6/5815 useless extension candidates. Maximal degree in co-relation 56971. Up to 5447 conditions per place. [2024-06-28 00:16:32,074 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 621 selfloop transitions, 116 changer transitions 0/740 dead transitions. [2024-06-28 00:16:32,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 740 transitions, 16156 flow [2024-06-28 00:16:32,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:16:32,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:16:32,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 00:16:32,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465625 [2024-06-28 00:16:32,076 INFO L175 Difference]: Start difference. First operand has 291 places, 691 transitions, 13964 flow. Second operand 8 states and 149 transitions. [2024-06-28 00:16:32,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 740 transitions, 16156 flow [2024-06-28 00:16:32,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 740 transitions, 16020 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-28 00:16:32,805 INFO L231 Difference]: Finished difference. Result has 295 places, 706 transitions, 14446 flow [2024-06-28 00:16:32,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13828, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=691, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14446, PETRI_PLACES=295, PETRI_TRANSITIONS=706} [2024-06-28 00:16:32,806 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 254 predicate places. [2024-06-28 00:16:32,806 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 706 transitions, 14446 flow [2024-06-28 00:16:32,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:16:32,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:16:32,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:16:32,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 00:16:32,806 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)] === [2024-06-28 00:16:32,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:16:32,807 INFO L85 PathProgramCache]: Analyzing trace with hash 351688547, now seen corresponding path program 5 times [2024-06-28 00:16:32,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:16:32,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614905336] [2024-06-28 00:16:32,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:16:32,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:16:32,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:16:34,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:16:34,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:16:34,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614905336] [2024-06-28 00:16:34,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614905336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:16:34,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:16:34,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:16:34,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781585149] [2024-06-28 00:16:34,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:16:34,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:16:34,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:16:34,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:16:34,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:16:34,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:16:34,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 706 transitions, 14446 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:16:34,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:16:34,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:16:34,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:16:35,982 INFO L124 PetriNetUnfolderBase]: 3923/5869 cut-off events. [2024-06-28 00:16:35,983 INFO L125 PetriNetUnfolderBase]: For 339713/339719 co-relation queries the response was YES. [2024-06-28 00:16:36,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58003 conditions, 5869 events. 3923/5869 cut-off events. For 339713/339719 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 31416 event pairs, 1029 based on Foata normal form. 8/5874 useless extension candidates. Maximal degree in co-relation 57858. Up to 5310 conditions per place. [2024-06-28 00:16:36,073 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 588 selfloop transitions, 170 changer transitions 0/761 dead transitions. [2024-06-28 00:16:36,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 761 transitions, 16742 flow [2024-06-28 00:16:36,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:16:36,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:16:36,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-28 00:16:36,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527777777777778 [2024-06-28 00:16:36,075 INFO L175 Difference]: Start difference. First operand has 295 places, 706 transitions, 14446 flow. Second operand 9 states and 163 transitions. [2024-06-28 00:16:36,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 761 transitions, 16742 flow [2024-06-28 00:16:36,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 761 transitions, 16512 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-28 00:16:36,870 INFO L231 Difference]: Finished difference. Result has 299 places, 712 transitions, 14695 flow [2024-06-28 00:16:36,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14223, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14695, PETRI_PLACES=299, PETRI_TRANSITIONS=712} [2024-06-28 00:16:36,871 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 258 predicate places. [2024-06-28 00:16:36,871 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 712 transitions, 14695 flow [2024-06-28 00:16:36,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:16:36,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:16:36,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:16:36,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 00:16:36,871 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)] === [2024-06-28 00:16:36,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:16:36,872 INFO L85 PathProgramCache]: Analyzing trace with hash 351683897, now seen corresponding path program 6 times [2024-06-28 00:16:36,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:16:36,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270067678] [2024-06-28 00:16:36,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:16:36,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:16:36,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:16:38,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:16:38,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:16:38,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270067678] [2024-06-28 00:16:38,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270067678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:16:38,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:16:38,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:16:38,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165064949] [2024-06-28 00:16:38,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:16:38,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:16:38,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:16:38,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:16:38,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:16:38,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:16:38,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 712 transitions, 14695 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:16:38,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:16:38,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:16:38,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:16:40,296 INFO L124 PetriNetUnfolderBase]: 4011/6002 cut-off events. [2024-06-28 00:16:40,297 INFO L125 PetriNetUnfolderBase]: For 349763/349769 co-relation queries the response was YES. [2024-06-28 00:16:40,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59484 conditions, 6002 events. 4011/6002 cut-off events. For 349763/349769 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 32242 event pairs, 1032 based on Foata normal form. 8/6007 useless extension candidates. Maximal degree in co-relation 59338. Up to 5297 conditions per place. [2024-06-28 00:16:40,403 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 591 selfloop transitions, 180 changer transitions 0/774 dead transitions. [2024-06-28 00:16:40,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 774 transitions, 17267 flow [2024-06-28 00:16:40,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:16:40,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:16:40,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-28 00:16:40,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46111111111111114 [2024-06-28 00:16:40,406 INFO L175 Difference]: Start difference. First operand has 299 places, 712 transitions, 14695 flow. Second operand 9 states and 166 transitions. [2024-06-28 00:16:40,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 774 transitions, 17267 flow [2024-06-28 00:16:41,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 774 transitions, 16899 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-28 00:16:41,310 INFO L231 Difference]: Finished difference. Result has 302 places, 726 transitions, 15007 flow [2024-06-28 00:16:41,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14327, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15007, PETRI_PLACES=302, PETRI_TRANSITIONS=726} [2024-06-28 00:16:41,311 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 261 predicate places. [2024-06-28 00:16:41,311 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 726 transitions, 15007 flow [2024-06-28 00:16:41,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:16:41,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:16:41,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:16:41,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 00:16:41,311 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)] === [2024-06-28 00:16:41,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:16:41,312 INFO L85 PathProgramCache]: Analyzing trace with hash 351868223, now seen corresponding path program 4 times [2024-06-28 00:16:41,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:16:41,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973432535] [2024-06-28 00:16:41,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:16:41,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:16:41,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:16:42,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:16:42,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:16:42,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973432535] [2024-06-28 00:16:42,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973432535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:16:42,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:16:42,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:16:42,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616163710] [2024-06-28 00:16:42,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:16:42,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:16:42,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:16:42,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:16:42,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:16:42,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:16:42,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 726 transitions, 15007 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:16:42,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:16:42,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:16:42,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:16:44,803 INFO L124 PetriNetUnfolderBase]: 4000/5981 cut-off events. [2024-06-28 00:16:44,804 INFO L125 PetriNetUnfolderBase]: For 356600/356606 co-relation queries the response was YES. [2024-06-28 00:16:44,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59592 conditions, 5981 events. 4000/5981 cut-off events. For 356600/356606 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 32073 event pairs, 1034 based on Foata normal form. 6/5984 useless extension candidates. Maximal degree in co-relation 59444. Up to 5614 conditions per place. [2024-06-28 00:16:44,896 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 643 selfloop transitions, 119 changer transitions 0/765 dead transitions. [2024-06-28 00:16:44,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 765 transitions, 16791 flow [2024-06-28 00:16:44,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:16:44,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:16:44,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2024-06-28 00:16:44,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-28 00:16:44,905 INFO L175 Difference]: Start difference. First operand has 302 places, 726 transitions, 15007 flow. Second operand 11 states and 180 transitions. [2024-06-28 00:16:44,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 765 transitions, 16791 flow [2024-06-28 00:16:45,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 765 transitions, 16512 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-28 00:16:45,734 INFO L231 Difference]: Finished difference. Result has 308 places, 726 transitions, 14992 flow [2024-06-28 00:16:45,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14728, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14992, PETRI_PLACES=308, PETRI_TRANSITIONS=726} [2024-06-28 00:16:45,735 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 267 predicate places. [2024-06-28 00:16:45,735 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 726 transitions, 14992 flow [2024-06-28 00:16:45,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:16:45,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:16:45,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:16:45,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 00:16:45,736 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)] === [2024-06-28 00:16:45,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:16:45,736 INFO L85 PathProgramCache]: Analyzing trace with hash 351861527, now seen corresponding path program 7 times [2024-06-28 00:16:45,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:16:45,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137898664] [2024-06-28 00:16:45,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:16:45,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:16:45,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:16:47,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:16:47,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:16:47,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137898664] [2024-06-28 00:16:47,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137898664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:16:47,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:16:47,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:16:47,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114745977] [2024-06-28 00:16:47,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:16:47,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:16:47,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:16:47,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:16:47,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:16:47,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:16:47,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 726 transitions, 14992 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:16:47,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:16:47,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:16:47,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:16:48,968 INFO L124 PetriNetUnfolderBase]: 3984/5962 cut-off events. [2024-06-28 00:16:48,968 INFO L125 PetriNetUnfolderBase]: For 362153/362159 co-relation queries the response was YES. [2024-06-28 00:16:49,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59513 conditions, 5962 events. 3984/5962 cut-off events. For 362153/362159 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 32005 event pairs, 1031 based on Foata normal form. 8/5967 useless extension candidates. Maximal degree in co-relation 59363. Up to 5403 conditions per place. [2024-06-28 00:16:49,059 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 605 selfloop transitions, 174 changer transitions 0/782 dead transitions. [2024-06-28 00:16:49,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 782 transitions, 17133 flow [2024-06-28 00:16:49,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:16:49,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:16:49,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-28 00:16:49,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42954545454545456 [2024-06-28 00:16:49,061 INFO L175 Difference]: Start difference. First operand has 308 places, 726 transitions, 14992 flow. Second operand 11 states and 189 transitions. [2024-06-28 00:16:49,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 782 transitions, 17133 flow [2024-06-28 00:16:49,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 782 transitions, 16790 flow, removed 39 selfloop flow, removed 11 redundant places. [2024-06-28 00:16:49,996 INFO L231 Difference]: Finished difference. Result has 308 places, 728 transitions, 15073 flow [2024-06-28 00:16:49,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14667, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15073, PETRI_PLACES=308, PETRI_TRANSITIONS=728} [2024-06-28 00:16:49,997 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 267 predicate places. [2024-06-28 00:16:49,997 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 728 transitions, 15073 flow [2024-06-28 00:16:49,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:16:49,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:16:49,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:16:49,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 00:16:49,998 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)] === [2024-06-28 00:16:49,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:16:49,998 INFO L85 PathProgramCache]: Analyzing trace with hash 879352993, now seen corresponding path program 2 times [2024-06-28 00:16:49,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:16:49,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734380646] [2024-06-28 00:16:49,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:16:49,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:16:50,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:16:51,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:16:51,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:16:51,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734380646] [2024-06-28 00:16:51,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734380646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:16:51,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:16:51,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:16:51,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431831543] [2024-06-28 00:16:51,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:16:51,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:16:51,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:16:51,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:16:51,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:16:51,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:16:51,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 728 transitions, 15073 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:16:51,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:16:51,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:16:51,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:16:53,049 INFO L124 PetriNetUnfolderBase]: 4001/5987 cut-off events. [2024-06-28 00:16:53,049 INFO L125 PetriNetUnfolderBase]: For 363699/363702 co-relation queries the response was YES. [2024-06-28 00:16:53,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59721 conditions, 5987 events. 4001/5987 cut-off events. For 363699/363702 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 32128 event pairs, 1224 based on Foata normal form. 6/5990 useless extension candidates. Maximal degree in co-relation 59571. Up to 5818 conditions per place. [2024-06-28 00:16:53,142 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 724 selfloop transitions, 29 changer transitions 0/756 dead transitions. [2024-06-28 00:16:53,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 756 transitions, 16784 flow [2024-06-28 00:16:53,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:16:53,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:16:53,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-28 00:16:53,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39375 [2024-06-28 00:16:53,145 INFO L175 Difference]: Start difference. First operand has 308 places, 728 transitions, 15073 flow. Second operand 8 states and 126 transitions. [2024-06-28 00:16:53,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 756 transitions, 16784 flow [2024-06-28 00:16:54,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 756 transitions, 16440 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-28 00:16:54,029 INFO L231 Difference]: Finished difference. Result has 307 places, 730 transitions, 14836 flow [2024-06-28 00:16:54,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14729, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14836, PETRI_PLACES=307, PETRI_TRANSITIONS=730} [2024-06-28 00:16:54,029 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 266 predicate places. [2024-06-28 00:16:54,029 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 730 transitions, 14836 flow [2024-06-28 00:16:54,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:16:54,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:16:54,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:16:54,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 00:16:54,030 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)] === [2024-06-28 00:16:54,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:16:54,030 INFO L85 PathProgramCache]: Analyzing trace with hash -910234515, now seen corresponding path program 7 times [2024-06-28 00:16:54,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:16:54,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317345422] [2024-06-28 00:16:54,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:16:54,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:16:54,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:16:55,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:16:55,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:16:55,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317345422] [2024-06-28 00:16:55,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317345422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:16:55,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:16:55,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:16:55,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175908101] [2024-06-28 00:16:55,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:16:55,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:16:55,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:16:55,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:16:55,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:16:55,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:16:55,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 730 transitions, 14836 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:16:55,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:16:55,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:16:55,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:16:57,701 INFO L124 PetriNetUnfolderBase]: 3979/6022 cut-off events. [2024-06-28 00:16:57,701 INFO L125 PetriNetUnfolderBase]: For 404140/404208 co-relation queries the response was YES. [2024-06-28 00:16:57,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59296 conditions, 6022 events. 3979/6022 cut-off events. For 404140/404208 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 33035 event pairs, 1074 based on Foata normal form. 36/5902 useless extension candidates. Maximal degree in co-relation 59145. Up to 5146 conditions per place. [2024-06-28 00:16:57,792 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 542 selfloop transitions, 106 changer transitions 0/794 dead transitions. [2024-06-28 00:16:57,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 794 transitions, 16962 flow [2024-06-28 00:16:57,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:16:57,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:16:57,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-28 00:16:57,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48125 [2024-06-28 00:16:57,793 INFO L175 Difference]: Start difference. First operand has 307 places, 730 transitions, 14836 flow. Second operand 8 states and 154 transitions. [2024-06-28 00:16:57,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 794 transitions, 16962 flow [2024-06-28 00:16:58,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 794 transitions, 16880 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-28 00:16:58,654 INFO L231 Difference]: Finished difference. Result has 314 places, 755 transitions, 15510 flow [2024-06-28 00:16:58,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14754, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15510, PETRI_PLACES=314, PETRI_TRANSITIONS=755} [2024-06-28 00:16:58,655 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 273 predicate places. [2024-06-28 00:16:58,655 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 755 transitions, 15510 flow [2024-06-28 00:16:58,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:16:58,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:16:58,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:16:58,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 00:16:58,655 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)] === [2024-06-28 00:16:58,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:16:58,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1498299713, now seen corresponding path program 8 times [2024-06-28 00:16:58,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:16:58,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504388198] [2024-06-28 00:16:58,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:16:58,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:16:58,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:17:00,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:17:00,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:17:00,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504388198] [2024-06-28 00:17:00,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504388198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:17:00,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:17:00,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:17:00,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232715769] [2024-06-28 00:17:00,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:17:00,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:17:00,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:17:00,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:17:00,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:17:00,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:17:00,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 755 transitions, 15510 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:17:00,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:17:00,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:17:00,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:17:02,110 INFO L124 PetriNetUnfolderBase]: 4219/6340 cut-off events. [2024-06-28 00:17:02,110 INFO L125 PetriNetUnfolderBase]: For 394278/394281 co-relation queries the response was YES. [2024-06-28 00:17:02,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63271 conditions, 6340 events. 4219/6340 cut-off events. For 394278/394281 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 34703 event pairs, 1213 based on Foata normal form. 6/6343 useless extension candidates. Maximal degree in co-relation 63116. Up to 5919 conditions per place. [2024-06-28 00:17:02,205 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 705 selfloop transitions, 100 changer transitions 0/808 dead transitions. [2024-06-28 00:17:02,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 808 transitions, 18079 flow [2024-06-28 00:17:02,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:17:02,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:17:02,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-28 00:17:02,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-28 00:17:02,207 INFO L175 Difference]: Start difference. First operand has 314 places, 755 transitions, 15510 flow. Second operand 8 states and 144 transitions. [2024-06-28 00:17:02,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 808 transitions, 18079 flow [2024-06-28 00:17:03,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 808 transitions, 17960 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-28 00:17:03,186 INFO L231 Difference]: Finished difference. Result has 320 places, 769 transitions, 15918 flow [2024-06-28 00:17:03,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15393, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=755, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=661, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15918, PETRI_PLACES=320, PETRI_TRANSITIONS=769} [2024-06-28 00:17:03,187 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 279 predicate places. [2024-06-28 00:17:03,187 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 769 transitions, 15918 flow [2024-06-28 00:17:03,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:17:03,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:17:03,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:17:03,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 00:17:03,187 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)] === [2024-06-28 00:17:03,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:17:03,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1498304549, now seen corresponding path program 5 times [2024-06-28 00:17:03,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:17:03,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760592718] [2024-06-28 00:17:03,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:17:03,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:17:03,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:17:04,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:17:04,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:17:04,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760592718] [2024-06-28 00:17:04,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760592718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:17:04,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:17:04,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:17:04,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457867861] [2024-06-28 00:17:04,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:17:04,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:17:04,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:17:04,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:17:04,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:17:04,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:17:04,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 769 transitions, 15918 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:17:04,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:17:04,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:17:04,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:17:06,512 INFO L124 PetriNetUnfolderBase]: 4205/6313 cut-off events. [2024-06-28 00:17:06,513 INFO L125 PetriNetUnfolderBase]: For 398117/398120 co-relation queries the response was YES. [2024-06-28 00:17:06,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62947 conditions, 6313 events. 4205/6313 cut-off events. For 398117/398120 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 34428 event pairs, 1215 based on Foata normal form. 5/6315 useless extension candidates. Maximal degree in co-relation 62790. Up to 5957 conditions per place. [2024-06-28 00:17:06,616 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 687 selfloop transitions, 107 changer transitions 0/797 dead transitions. [2024-06-28 00:17:06,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 797 transitions, 17956 flow [2024-06-28 00:17:06,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:17:06,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:17:06,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-28 00:17:06,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-28 00:17:06,618 INFO L175 Difference]: Start difference. First operand has 320 places, 769 transitions, 15918 flow. Second operand 8 states and 130 transitions. [2024-06-28 00:17:06,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 797 transitions, 17956 flow [2024-06-28 00:17:07,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 797 transitions, 17822 flow, removed 60 selfloop flow, removed 2 redundant places. [2024-06-28 00:17:07,956 INFO L231 Difference]: Finished difference. Result has 326 places, 769 transitions, 16023 flow [2024-06-28 00:17:07,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15784, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=769, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=662, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16023, PETRI_PLACES=326, PETRI_TRANSITIONS=769} [2024-06-28 00:17:07,957 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 285 predicate places. [2024-06-28 00:17:07,957 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 769 transitions, 16023 flow [2024-06-28 00:17:07,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:17:07,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:17:07,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:17:07,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 00:17:07,958 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)] === [2024-06-28 00:17:07,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:17:07,958 INFO L85 PathProgramCache]: Analyzing trace with hash 643177633, now seen corresponding path program 3 times [2024-06-28 00:17:07,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:17:07,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042825858] [2024-06-28 00:17:07,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:17:07,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:17:07,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:17:09,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:17:09,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:17:09,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042825858] [2024-06-28 00:17:09,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042825858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:17:09,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:17:09,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:17:09,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646095257] [2024-06-28 00:17:09,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:17:09,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:17:09,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:17:09,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:17:09,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:17:09,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:17:09,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 769 transitions, 16023 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:17:09,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:17:09,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:17:09,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:17:11,413 INFO L124 PetriNetUnfolderBase]: 4239/6370 cut-off events. [2024-06-28 00:17:11,413 INFO L125 PetriNetUnfolderBase]: For 413774/413777 co-relation queries the response was YES. [2024-06-28 00:17:11,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63566 conditions, 6370 events. 4239/6370 cut-off events. For 413774/413777 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 34867 event pairs, 1225 based on Foata normal form. 4/6371 useless extension candidates. Maximal degree in co-relation 63407. Up to 6081 conditions per place. [2024-06-28 00:17:11,508 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 725 selfloop transitions, 66 changer transitions 0/794 dead transitions. [2024-06-28 00:17:11,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 794 transitions, 17770 flow [2024-06-28 00:17:11,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:17:11,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:17:11,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-28 00:17:11,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-28 00:17:11,510 INFO L175 Difference]: Start difference. First operand has 326 places, 769 transitions, 16023 flow. Second operand 8 states and 124 transitions. [2024-06-28 00:17:11,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 794 transitions, 17770 flow [2024-06-28 00:17:12,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 794 transitions, 17337 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-28 00:17:12,453 INFO L231 Difference]: Finished difference. Result has 326 places, 773 transitions, 15791 flow [2024-06-28 00:17:12,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15590, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=769, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=703, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15791, PETRI_PLACES=326, PETRI_TRANSITIONS=773} [2024-06-28 00:17:12,453 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 285 predicate places. [2024-06-28 00:17:12,454 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 773 transitions, 15791 flow [2024-06-28 00:17:12,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:17:12,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:17:12,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:17:12,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 00:17:12,454 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)] === [2024-06-28 00:17:12,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:17:12,454 INFO L85 PathProgramCache]: Analyzing trace with hash 879352745, now seen corresponding path program 6 times [2024-06-28 00:17:12,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:17:12,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544802266] [2024-06-28 00:17:12,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:17:12,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:17:12,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:17:13,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:17:13,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:17:13,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544802266] [2024-06-28 00:17:13,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544802266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:17:13,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:17:13,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:17:13,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822062957] [2024-06-28 00:17:13,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:17:13,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:17:13,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:17:13,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:17:13,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:17:13,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:17:13,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 773 transitions, 15791 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:17:13,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:17:13,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:17:13,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:17:15,725 INFO L124 PetriNetUnfolderBase]: 4231/6350 cut-off events. [2024-06-28 00:17:15,725 INFO L125 PetriNetUnfolderBase]: For 402995/402998 co-relation queries the response was YES. [2024-06-28 00:17:15,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62968 conditions, 6350 events. 4231/6350 cut-off events. For 402995/402998 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 34666 event pairs, 1251 based on Foata normal form. 5/6352 useless extension candidates. Maximal degree in co-relation 62811. Up to 6190 conditions per place. [2024-06-28 00:17:15,829 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 754 selfloop transitions, 37 changer transitions 0/794 dead transitions. [2024-06-28 00:17:15,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 794 transitions, 17527 flow [2024-06-28 00:17:15,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:17:15,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:17:15,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-28 00:17:15,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-28 00:17:15,831 INFO L175 Difference]: Start difference. First operand has 326 places, 773 transitions, 15791 flow. Second operand 7 states and 114 transitions. [2024-06-28 00:17:15,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 794 transitions, 17527 flow [2024-06-28 00:17:16,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 794 transitions, 17382 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-28 00:17:16,894 INFO L231 Difference]: Finished difference. Result has 328 places, 773 transitions, 15742 flow [2024-06-28 00:17:16,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15646, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=773, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=736, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=15742, PETRI_PLACES=328, PETRI_TRANSITIONS=773} [2024-06-28 00:17:16,895 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 287 predicate places. [2024-06-28 00:17:16,895 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 773 transitions, 15742 flow [2024-06-28 00:17:16,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:17:16,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:17:16,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:17:16,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 00:17:16,895 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)] === [2024-06-28 00:17:16,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:17:16,896 INFO L85 PathProgramCache]: Analyzing trace with hash 879649663, now seen corresponding path program 4 times [2024-06-28 00:17:16,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:17:16,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812831436] [2024-06-28 00:17:16,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:17:16,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:17:16,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:17:18,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:17:18,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:17:18,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812831436] [2024-06-28 00:17:18,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812831436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:17:18,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:17:18,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:17:18,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536215860] [2024-06-28 00:17:18,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:17:18,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:17:18,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:17:18,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:17:18,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:17:18,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:17:18,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 773 transitions, 15742 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:17:18,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:17:18,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:17:18,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:17:19,989 INFO L124 PetriNetUnfolderBase]: 4223/6337 cut-off events. [2024-06-28 00:17:19,989 INFO L125 PetriNetUnfolderBase]: For 410530/410533 co-relation queries the response was YES. [2024-06-28 00:17:20,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62776 conditions, 6337 events. 4223/6337 cut-off events. For 410530/410533 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 34502 event pairs, 1235 based on Foata normal form. 6/6340 useless extension candidates. Maximal degree in co-relation 62618. Up to 6184 conditions per place. [2024-06-28 00:17:20,091 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 776 selfloop transitions, 17 changer transitions 0/796 dead transitions. [2024-06-28 00:17:20,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 796 transitions, 17486 flow [2024-06-28 00:17:20,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:17:20,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:17:20,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-28 00:17:20,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.371875 [2024-06-28 00:17:20,093 INFO L175 Difference]: Start difference. First operand has 328 places, 773 transitions, 15742 flow. Second operand 8 states and 119 transitions. [2024-06-28 00:17:20,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 796 transitions, 17486 flow [2024-06-28 00:17:21,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 796 transitions, 17340 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-28 00:17:21,221 INFO L231 Difference]: Finished difference. Result has 330 places, 775 transitions, 15685 flow [2024-06-28 00:17:21,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15596, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=773, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=756, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15685, PETRI_PLACES=330, PETRI_TRANSITIONS=775} [2024-06-28 00:17:21,222 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 289 predicate places. [2024-06-28 00:17:21,222 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 775 transitions, 15685 flow [2024-06-28 00:17:21,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:17:21,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:17:21,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:17:21,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 00:17:21,222 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)] === [2024-06-28 00:17:21,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:17:21,223 INFO L85 PathProgramCache]: Analyzing trace with hash 871078535, now seen corresponding path program 7 times [2024-06-28 00:17:21,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:17:21,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334415661] [2024-06-28 00:17:21,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:17:21,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:17:21,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:17:22,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:17:22,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:17:22,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334415661] [2024-06-28 00:17:22,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334415661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:17:22,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:17:22,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:17:22,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147824944] [2024-06-28 00:17:22,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:17:22,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:17:22,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:17:22,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:17:22,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:17:22,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:17:22,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 775 transitions, 15685 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:17:22,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:17:22,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:17:22,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:17:24,769 INFO L124 PetriNetUnfolderBase]: 4209/6317 cut-off events. [2024-06-28 00:17:24,769 INFO L125 PetriNetUnfolderBase]: For 417205/417205 co-relation queries the response was YES. [2024-06-28 00:17:24,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62597 conditions, 6317 events. 4209/6317 cut-off events. For 417205/417205 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 34385 event pairs, 1245 based on Foata normal form. 5/6320 useless extension candidates. Maximal degree in co-relation 62438. Up to 6145 conditions per place. [2024-06-28 00:17:24,853 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 757 selfloop transitions, 41 changer transitions 0/801 dead transitions. [2024-06-28 00:17:24,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 801 transitions, 17482 flow [2024-06-28 00:17:24,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:17:24,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:17:24,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-28 00:17:24,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39375 [2024-06-28 00:17:24,855 INFO L175 Difference]: Start difference. First operand has 330 places, 775 transitions, 15685 flow. Second operand 8 states and 126 transitions. [2024-06-28 00:17:24,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 801 transitions, 17482 flow [2024-06-28 00:17:25,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 801 transitions, 17385 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-28 00:17:25,755 INFO L231 Difference]: Finished difference. Result has 333 places, 777 transitions, 15731 flow [2024-06-28 00:17:25,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15590, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=775, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=735, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15731, PETRI_PLACES=333, PETRI_TRANSITIONS=777} [2024-06-28 00:17:25,756 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 292 predicate places. [2024-06-28 00:17:25,756 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 777 transitions, 15731 flow [2024-06-28 00:17:25,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:17:25,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:17:25,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:17:25,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 00:17:25,756 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)] === [2024-06-28 00:17:25,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:17:25,756 INFO L85 PathProgramCache]: Analyzing trace with hash 717067555, now seen corresponding path program 9 times [2024-06-28 00:17:25,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:17:25,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638619693] [2024-06-28 00:17:25,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:17:25,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:17:25,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:17:27,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:17:27,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:17:27,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638619693] [2024-06-28 00:17:27,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638619693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:17:27,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:17:27,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:17:27,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298765831] [2024-06-28 00:17:27,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:17:27,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:17:27,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:17:27,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:17:27,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:17:27,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:17:27,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 777 transitions, 15731 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:17:27,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:17:27,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:17:27,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:17:29,292 INFO L124 PetriNetUnfolderBase]: 4245/6384 cut-off events. [2024-06-28 00:17:29,292 INFO L125 PetriNetUnfolderBase]: For 432958/432961 co-relation queries the response was YES. [2024-06-28 00:17:29,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63298 conditions, 6384 events. 4245/6384 cut-off events. For 432958/432961 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 35000 event pairs, 1222 based on Foata normal form. 6/6387 useless extension candidates. Maximal degree in co-relation 63137. Up to 6073 conditions per place. [2024-06-28 00:17:29,393 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 726 selfloop transitions, 85 changer transitions 0/814 dead transitions. [2024-06-28 00:17:29,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 814 transitions, 17778 flow [2024-06-28 00:17:29,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:17:29,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:17:29,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-28 00:17:29,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39166666666666666 [2024-06-28 00:17:29,395 INFO L175 Difference]: Start difference. First operand has 333 places, 777 transitions, 15731 flow. Second operand 9 states and 141 transitions. [2024-06-28 00:17:29,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 814 transitions, 17778 flow [2024-06-28 00:17:30,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 814 transitions, 17549 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-28 00:17:30,614 INFO L231 Difference]: Finished difference. Result has 333 places, 783 transitions, 15819 flow [2024-06-28 00:17:30,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15502, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=777, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=692, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15819, PETRI_PLACES=333, PETRI_TRANSITIONS=783} [2024-06-28 00:17:30,615 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 292 predicate places. [2024-06-28 00:17:30,615 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 783 transitions, 15819 flow [2024-06-28 00:17:30,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:17:30,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:17:30,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:17:30,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 00:17:30,616 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)] === [2024-06-28 00:17:30,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:17:30,616 INFO L85 PathProgramCache]: Analyzing trace with hash 871071839, now seen corresponding path program 10 times [2024-06-28 00:17:30,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:17:30,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294308259] [2024-06-28 00:17:30,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:17:30,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:17:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:17:32,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:17:32,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:17:32,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294308259] [2024-06-28 00:17:32,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294308259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:17:32,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:17:32,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:17:32,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365082693] [2024-06-28 00:17:32,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:17:32,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:17:32,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:17:32,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:17:32,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:17:32,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:17:32,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 783 transitions, 15819 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:17:32,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:17:32,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:17:32,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:17:34,153 INFO L124 PetriNetUnfolderBase]: 4281/6427 cut-off events. [2024-06-28 00:17:34,153 INFO L125 PetriNetUnfolderBase]: For 443441/443444 co-relation queries the response was YES. [2024-06-28 00:17:34,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64163 conditions, 6427 events. 4281/6427 cut-off events. For 443441/443444 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 35118 event pairs, 1249 based on Foata normal form. 8/6432 useless extension candidates. Maximal degree in co-relation 64001. Up to 6224 conditions per place. [2024-06-28 00:17:34,283 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 768 selfloop transitions, 44 changer transitions 0/815 dead transitions. [2024-06-28 00:17:34,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 815 transitions, 17765 flow [2024-06-28 00:17:34,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:17:34,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:17:34,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-28 00:17:34,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37777777777777777 [2024-06-28 00:17:34,285 INFO L175 Difference]: Start difference. First operand has 333 places, 783 transitions, 15819 flow. Second operand 9 states and 136 transitions. [2024-06-28 00:17:34,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 815 transitions, 17765 flow [2024-06-28 00:17:35,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 815 transitions, 17607 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-28 00:17:35,354 INFO L231 Difference]: Finished difference. Result has 338 places, 789 transitions, 15910 flow [2024-06-28 00:17:35,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15661, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=783, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=739, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15910, PETRI_PLACES=338, PETRI_TRANSITIONS=789} [2024-06-28 00:17:35,354 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 297 predicate places. [2024-06-28 00:17:35,355 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 789 transitions, 15910 flow [2024-06-28 00:17:35,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:17:35,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:17:35,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:17:35,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 00:17:35,355 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:17:35,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:17:35,356 INFO L85 PathProgramCache]: Analyzing trace with hash 642997709, now seen corresponding path program 11 times [2024-06-28 00:17:35,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:17:35,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997709495] [2024-06-28 00:17:35,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:17:35,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:17:35,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:17:36,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:17:36,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:17:36,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997709495] [2024-06-28 00:17:36,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997709495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:17:36,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:17:36,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:17:36,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106410069] [2024-06-28 00:17:36,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:17:36,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:17:36,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:17:36,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:17:36,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:17:37,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:17:37,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 789 transitions, 15910 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:17:37,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:17:37,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:17:37,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:17:39,098 INFO L124 PetriNetUnfolderBase]: 4265/6417 cut-off events. [2024-06-28 00:17:39,098 INFO L125 PetriNetUnfolderBase]: For 448810/448813 co-relation queries the response was YES. [2024-06-28 00:17:39,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63696 conditions, 6417 events. 4265/6417 cut-off events. For 448810/448813 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 35226 event pairs, 1216 based on Foata normal form. 6/6420 useless extension candidates. Maximal degree in co-relation 63533. Up to 6103 conditions per place. [2024-06-28 00:17:39,189 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 728 selfloop transitions, 90 changer transitions 0/821 dead transitions. [2024-06-28 00:17:39,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 821 transitions, 17859 flow [2024-06-28 00:17:39,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:17:39,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:17:39,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-28 00:17:39,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3972222222222222 [2024-06-28 00:17:39,191 INFO L175 Difference]: Start difference. First operand has 338 places, 789 transitions, 15910 flow. Second operand 9 states and 143 transitions. [2024-06-28 00:17:39,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 821 transitions, 17859 flow [2024-06-28 00:17:40,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 821 transitions, 17650 flow, removed 66 selfloop flow, removed 7 redundant places. [2024-06-28 00:17:40,309 INFO L231 Difference]: Finished difference. Result has 340 places, 791 transitions, 15948 flow [2024-06-28 00:17:40,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15717, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=789, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15948, PETRI_PLACES=340, PETRI_TRANSITIONS=791} [2024-06-28 00:17:40,310 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 299 predicate places. [2024-06-28 00:17:40,310 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 791 transitions, 15948 flow [2024-06-28 00:17:40,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:17:40,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:17:40,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:17:40,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 00:17:40,310 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)] === [2024-06-28 00:17:40,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:17:40,310 INFO L85 PathProgramCache]: Analyzing trace with hash -452998007, now seen corresponding path program 1 times [2024-06-28 00:17:40,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:17:40,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089999567] [2024-06-28 00:17:40,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:17:40,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:17:40,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:17:42,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:17:42,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:17:42,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089999567] [2024-06-28 00:17:42,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089999567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:17:42,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:17:42,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:17:42,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993812432] [2024-06-28 00:17:42,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:17:42,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:17:42,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:17:42,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:17:42,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:17:42,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-28 00:17:42,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 791 transitions, 15948 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:17:42,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:17:42,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-28 00:17:42,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:17:44,544 INFO L124 PetriNetUnfolderBase]: 3816/5952 cut-off events. [2024-06-28 00:17:44,544 INFO L125 PetriNetUnfolderBase]: For 563008/563210 co-relation queries the response was YES. [2024-06-28 00:17:44,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62260 conditions, 5952 events. 3816/5952 cut-off events. For 563008/563210 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 35264 event pairs, 371 based on Foata normal form. 36/5760 useless extension candidates. Maximal degree in co-relation 62096. Up to 2879 conditions per place. [2024-06-28 00:17:44,649 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 368 selfloop transitions, 274 changer transitions 0/851 dead transitions. [2024-06-28 00:17:44,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 851 transitions, 17976 flow [2024-06-28 00:17:44,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:17:44,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:17:44,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-28 00:17:44,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5194444444444445 [2024-06-28 00:17:44,650 INFO L175 Difference]: Start difference. First operand has 340 places, 791 transitions, 15948 flow. Second operand 9 states and 187 transitions. [2024-06-28 00:17:44,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 851 transitions, 17976 flow [2024-06-28 00:17:45,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 851 transitions, 17785 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-28 00:17:45,968 INFO L231 Difference]: Finished difference. Result has 346 places, 802 transitions, 16825 flow [2024-06-28 00:17:45,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15757, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=791, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16825, PETRI_PLACES=346, PETRI_TRANSITIONS=802} [2024-06-28 00:17:45,969 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 305 predicate places. [2024-06-28 00:17:45,969 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 802 transitions, 16825 flow [2024-06-28 00:17:45,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:17:45,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:17:45,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:17:45,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 00:17:45,970 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)] === [2024-06-28 00:17:45,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:17:45,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1878305101, now seen corresponding path program 2 times [2024-06-28 00:17:45,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:17:45,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077719903] [2024-06-28 00:17:45,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:17:45,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:17:45,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:17:47,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:17:47,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:17:47,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077719903] [2024-06-28 00:17:47,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077719903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:17:47,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:17:47,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:17:47,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890478092] [2024-06-28 00:17:47,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:17:47,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:17:47,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:17:47,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:17:47,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:17:47,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:17:47,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 802 transitions, 16825 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:17:47,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:17:47,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:17:47,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:17:50,021 INFO L124 PetriNetUnfolderBase]: 4584/6922 cut-off events. [2024-06-28 00:17:50,021 INFO L125 PetriNetUnfolderBase]: For 570804/570814 co-relation queries the response was YES. [2024-06-28 00:17:50,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71064 conditions, 6922 events. 4584/6922 cut-off events. For 570804/570814 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 38694 event pairs, 759 based on Foata normal form. 30/6949 useless extension candidates. Maximal degree in co-relation 70896. Up to 4353 conditions per place. [2024-06-28 00:17:50,117 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 473 selfloop transitions, 403 changer transitions 0/879 dead transitions. [2024-06-28 00:17:50,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 879 transitions, 19833 flow [2024-06-28 00:17:50,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:17:50,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:17:50,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-28 00:17:50,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2024-06-28 00:17:50,119 INFO L175 Difference]: Start difference. First operand has 346 places, 802 transitions, 16825 flow. Second operand 9 states and 185 transitions. [2024-06-28 00:17:50,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 879 transitions, 19833 flow [2024-06-28 00:17:51,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 879 transitions, 19459 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-28 00:17:51,430 INFO L231 Difference]: Finished difference. Result has 353 places, 814 transitions, 17667 flow [2024-06-28 00:17:51,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=16529, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=802, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=393, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17667, PETRI_PLACES=353, PETRI_TRANSITIONS=814} [2024-06-28 00:17:51,431 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 312 predicate places. [2024-06-28 00:17:51,431 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 814 transitions, 17667 flow [2024-06-28 00:17:51,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:17:51,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:17:51,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:17:51,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 00:17:51,431 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)] === [2024-06-28 00:17:51,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:17:51,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1880182771, now seen corresponding path program 3 times [2024-06-28 00:17:51,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:17:51,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292200294] [2024-06-28 00:17:51,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:17:51,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:17:51,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:17:53,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:17:53,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:17:53,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292200294] [2024-06-28 00:17:53,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292200294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:17:53,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:17:53,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:17:53,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487194556] [2024-06-28 00:17:53,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:17:53,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:17:53,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:17:53,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:17:53,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:17:53,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:17:53,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 814 transitions, 17667 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:17:53,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:17:53,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:17:53,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:17:55,549 INFO L124 PetriNetUnfolderBase]: 4725/7174 cut-off events. [2024-06-28 00:17:55,549 INFO L125 PetriNetUnfolderBase]: For 603609/603619 co-relation queries the response was YES. [2024-06-28 00:17:55,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73577 conditions, 7174 events. 4725/7174 cut-off events. For 603609/603619 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 40853 event pairs, 1123 based on Foata normal form. 36/7207 useless extension candidates. Maximal degree in co-relation 73407. Up to 5425 conditions per place. [2024-06-28 00:17:55,673 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 470 selfloop transitions, 396 changer transitions 0/869 dead transitions. [2024-06-28 00:17:55,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 869 transitions, 20090 flow [2024-06-28 00:17:55,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:17:55,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:17:55,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-28 00:17:55,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 00:17:55,675 INFO L175 Difference]: Start difference. First operand has 353 places, 814 transitions, 17667 flow. Second operand 9 states and 180 transitions. [2024-06-28 00:17:55,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 869 transitions, 20090 flow [2024-06-28 00:17:57,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 869 transitions, 19470 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-28 00:17:57,234 INFO L231 Difference]: Finished difference. Result has 358 places, 817 transitions, 17930 flow [2024-06-28 00:17:57,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=17051, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=814, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=393, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17930, PETRI_PLACES=358, PETRI_TRANSITIONS=817} [2024-06-28 00:17:57,235 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 317 predicate places. [2024-06-28 00:17:57,235 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 817 transitions, 17930 flow [2024-06-28 00:17:57,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:17:57,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:17:57,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:17:57,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 00:17:57,235 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)] === [2024-06-28 00:17:57,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:17:57,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1880179051, now seen corresponding path program 4 times [2024-06-28 00:17:57,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:17:57,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117563402] [2024-06-28 00:17:57,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:17:57,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:17:57,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:17:58,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:17:58,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:17:58,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117563402] [2024-06-28 00:17:58,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117563402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:17:58,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:17:58,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:17:58,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080996978] [2024-06-28 00:17:58,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:17:58,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:17:58,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:17:58,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:17:58,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:17:59,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:17:59,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 817 transitions, 17930 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:17:59,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:17:59,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:17:59,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:18:01,343 INFO L124 PetriNetUnfolderBase]: 4821/7332 cut-off events. [2024-06-28 00:18:01,343 INFO L125 PetriNetUnfolderBase]: For 611940/611950 co-relation queries the response was YES. [2024-06-28 00:18:01,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75444 conditions, 7332 events. 4821/7332 cut-off events. For 611940/611950 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 42147 event pairs, 1087 based on Foata normal form. 30/7359 useless extension candidates. Maximal degree in co-relation 75272. Up to 5362 conditions per place. [2024-06-28 00:18:01,460 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 478 selfloop transitions, 402 changer transitions 0/883 dead transitions. [2024-06-28 00:18:01,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 883 transitions, 20542 flow [2024-06-28 00:18:01,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:18:01,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:18:01,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-28 00:18:01,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2024-06-28 00:18:01,461 INFO L175 Difference]: Start difference. First operand has 358 places, 817 transitions, 17930 flow. Second operand 9 states and 184 transitions. [2024-06-28 00:18:01,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 883 transitions, 20542 flow [2024-06-28 00:18:03,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 883 transitions, 19738 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-28 00:18:03,041 INFO L231 Difference]: Finished difference. Result has 361 places, 823 transitions, 18111 flow [2024-06-28 00:18:03,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=17126, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=817, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=398, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18111, PETRI_PLACES=361, PETRI_TRANSITIONS=823} [2024-06-28 00:18:03,041 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 320 predicate places. [2024-06-28 00:18:03,041 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 823 transitions, 18111 flow [2024-06-28 00:18:03,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:18:03,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:18:03,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:18:03,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 00:18:03,042 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)] === [2024-06-28 00:18:03,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:18:03,042 INFO L85 PathProgramCache]: Analyzing trace with hash 438307763, now seen corresponding path program 5 times [2024-06-28 00:18:03,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:18:03,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901798350] [2024-06-28 00:18:03,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:18:03,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:18:03,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:18:04,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:18:04,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:18:04,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901798350] [2024-06-28 00:18:04,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901798350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:18:04,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:18:04,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:18:04,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655284502] [2024-06-28 00:18:04,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:18:04,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:18:04,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:18:04,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:18:04,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:18:04,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:18:04,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 823 transitions, 18111 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:18:04,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:18:04,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:18:04,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:18:07,535 INFO L124 PetriNetUnfolderBase]: 4945/7560 cut-off events. [2024-06-28 00:18:07,536 INFO L125 PetriNetUnfolderBase]: For 644442/644452 co-relation queries the response was YES. [2024-06-28 00:18:07,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77232 conditions, 7560 events. 4945/7560 cut-off events. For 644442/644452 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 44097 event pairs, 1302 based on Foata normal form. 36/7593 useless extension candidates. Maximal degree in co-relation 77058. Up to 6328 conditions per place. [2024-06-28 00:18:07,642 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 554 selfloop transitions, 323 changer transitions 0/880 dead transitions. [2024-06-28 00:18:07,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 880 transitions, 20496 flow [2024-06-28 00:18:07,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:18:07,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:18:07,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-28 00:18:07,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-06-28 00:18:07,644 INFO L175 Difference]: Start difference. First operand has 361 places, 823 transitions, 18111 flow. Second operand 10 states and 184 transitions. [2024-06-28 00:18:07,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 880 transitions, 20496 flow [2024-06-28 00:18:09,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 880 transitions, 19930 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-28 00:18:09,373 INFO L231 Difference]: Finished difference. Result has 366 places, 825 transitions, 18269 flow [2024-06-28 00:18:09,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=17545, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=823, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18269, PETRI_PLACES=366, PETRI_TRANSITIONS=825} [2024-06-28 00:18:09,374 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 325 predicate places. [2024-06-28 00:18:09,374 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 825 transitions, 18269 flow [2024-06-28 00:18:09,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:18:09,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:18:09,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:18:09,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 00:18:09,375 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)] === [2024-06-28 00:18:09,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:18:09,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1966870861, now seen corresponding path program 6 times [2024-06-28 00:18:09,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:18:09,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131651093] [2024-06-28 00:18:09,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:18:09,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:18:09,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:18:11,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:18:11,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:18:11,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131651093] [2024-06-28 00:18:11,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131651093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:18:11,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:18:11,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:18:11,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472732783] [2024-06-28 00:18:11,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:18:11,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:18:11,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:18:11,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:18:11,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:18:11,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:18:11,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 825 transitions, 18269 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:18:11,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:18:11,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:18:11,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:18:13,761 INFO L124 PetriNetUnfolderBase]: 5224/8019 cut-off events. [2024-06-28 00:18:13,761 INFO L125 PetriNetUnfolderBase]: For 713830/713840 co-relation queries the response was YES. [2024-06-28 00:18:13,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82880 conditions, 8019 events. 5224/8019 cut-off events. For 713830/713840 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 47755 event pairs, 1339 based on Foata normal form. 30/8046 useless extension candidates. Maximal degree in co-relation 82703. Up to 6381 conditions per place. [2024-06-28 00:18:13,900 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 573 selfloop transitions, 315 changer transitions 0/891 dead transitions. [2024-06-28 00:18:13,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 891 transitions, 21028 flow [2024-06-28 00:18:13,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:18:13,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:18:13,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-28 00:18:13,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49722222222222223 [2024-06-28 00:18:13,901 INFO L175 Difference]: Start difference. First operand has 366 places, 825 transitions, 18269 flow. Second operand 9 states and 179 transitions. [2024-06-28 00:18:13,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 891 transitions, 21028 flow [2024-06-28 00:18:15,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 891 transitions, 20360 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-28 00:18:15,936 INFO L231 Difference]: Finished difference. Result has 368 places, 831 transitions, 18425 flow [2024-06-28 00:18:15,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=17601, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=825, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=311, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18425, PETRI_PLACES=368, PETRI_TRANSITIONS=831} [2024-06-28 00:18:15,937 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 327 predicate places. [2024-06-28 00:18:15,937 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 831 transitions, 18425 flow [2024-06-28 00:18:15,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:18:15,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:18:15,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:18:15,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 00:18:15,938 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)] === [2024-06-28 00:18:15,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:18:15,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1967018731, now seen corresponding path program 7 times [2024-06-28 00:18:15,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:18:15,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772318727] [2024-06-28 00:18:15,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:18:15,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:18:15,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:18:17,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:18:17,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:18:17,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772318727] [2024-06-28 00:18:17,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772318727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:18:17,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:18:17,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:18:17,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394040890] [2024-06-28 00:18:17,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:18:17,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:18:17,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:18:17,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:18:17,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:18:17,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:18:17,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 831 transitions, 18425 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:18:17,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:18:17,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:18:17,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:18:20,185 INFO L124 PetriNetUnfolderBase]: 5165/7933 cut-off events. [2024-06-28 00:18:20,185 INFO L125 PetriNetUnfolderBase]: For 687243/687253 co-relation queries the response was YES. [2024-06-28 00:18:20,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80795 conditions, 7933 events. 5165/7933 cut-off events. For 687243/687253 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 47207 event pairs, 1400 based on Foata normal form. 36/7966 useless extension candidates. Maximal degree in co-relation 80617. Up to 6756 conditions per place. [2024-06-28 00:18:20,316 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 563 selfloop transitions, 319 changer transitions 0/885 dead transitions. [2024-06-28 00:18:20,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 885 transitions, 20780 flow [2024-06-28 00:18:20,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:18:20,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:18:20,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-28 00:18:20,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4525 [2024-06-28 00:18:20,317 INFO L175 Difference]: Start difference. First operand has 368 places, 831 transitions, 18425 flow. Second operand 10 states and 181 transitions. [2024-06-28 00:18:20,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 885 transitions, 20780 flow [2024-06-28 00:18:22,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 885 transitions, 20311 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-28 00:18:22,272 INFO L231 Difference]: Finished difference. Result has 373 places, 833 transitions, 18682 flow [2024-06-28 00:18:22,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=17984, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=831, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=317, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18682, PETRI_PLACES=373, PETRI_TRANSITIONS=833} [2024-06-28 00:18:22,273 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 332 predicate places. [2024-06-28 00:18:22,273 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 833 transitions, 18682 flow [2024-06-28 00:18:22,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:18:22,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:18:22,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:18:22,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 00:18:22,273 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)] === [2024-06-28 00:18:22,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:18:22,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1967024683, now seen corresponding path program 1 times [2024-06-28 00:18:22,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:18:22,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196630697] [2024-06-28 00:18:22,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:18:22,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:18:22,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:18:23,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:18:23,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:18:23,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196630697] [2024-06-28 00:18:23,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196630697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:18:23,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:18:23,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:18:23,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038243199] [2024-06-28 00:18:23,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:18:23,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:18:23,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:18:23,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:18:23,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:18:23,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:18:23,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 833 transitions, 18682 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:18:23,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:18:23,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:18:23,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:18:26,635 INFO L124 PetriNetUnfolderBase]: 5193/7973 cut-off events. [2024-06-28 00:18:26,636 INFO L125 PetriNetUnfolderBase]: For 653714/653724 co-relation queries the response was YES. [2024-06-28 00:18:26,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81663 conditions, 7973 events. 5193/7973 cut-off events. For 653714/653724 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 47515 event pairs, 1415 based on Foata normal form. 12/7982 useless extension candidates. Maximal degree in co-relation 81482. Up to 7072 conditions per place. [2024-06-28 00:18:26,765 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 567 selfloop transitions, 303 changer transitions 0/873 dead transitions. [2024-06-28 00:18:26,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 873 transitions, 20732 flow [2024-06-28 00:18:26,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:18:26,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:18:26,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-28 00:18:26,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-28 00:18:26,767 INFO L175 Difference]: Start difference. First operand has 373 places, 833 transitions, 18682 flow. Second operand 10 states and 170 transitions. [2024-06-28 00:18:26,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 873 transitions, 20732 flow [2024-06-28 00:18:28,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 873 transitions, 20096 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-28 00:18:28,564 INFO L231 Difference]: Finished difference. Result has 375 places, 837 transitions, 18776 flow [2024-06-28 00:18:28,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=18046, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=833, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18776, PETRI_PLACES=375, PETRI_TRANSITIONS=837} [2024-06-28 00:18:28,565 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 334 predicate places. [2024-06-28 00:18:28,565 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 837 transitions, 18776 flow [2024-06-28 00:18:28,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:18:28,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:18:28,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:18:28,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 00:18:28,565 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)] === [2024-06-28 00:18:28,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:18:28,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1261609227, now seen corresponding path program 2 times [2024-06-28 00:18:28,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:18:28,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139610856] [2024-06-28 00:18:28,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:18:28,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:18:28,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:18:30,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:18:30,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:18:30,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139610856] [2024-06-28 00:18:30,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139610856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:18:30,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:18:30,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:18:30,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568962502] [2024-06-28 00:18:30,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:18:30,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:18:30,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:18:30,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:18:30,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:18:30,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:18:30,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 837 transitions, 18776 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:18:30,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:18:30,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:18:30,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:18:33,050 INFO L124 PetriNetUnfolderBase]: 5232/8038 cut-off events. [2024-06-28 00:18:33,050 INFO L125 PetriNetUnfolderBase]: For 672615/672625 co-relation queries the response was YES. [2024-06-28 00:18:33,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82567 conditions, 8038 events. 5232/8038 cut-off events. For 672615/672625 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 47955 event pairs, 1297 based on Foata normal form. 12/8047 useless extension candidates. Maximal degree in co-relation 82385. Up to 7123 conditions per place. [2024-06-28 00:18:33,175 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 579 selfloop transitions, 296 changer transitions 0/878 dead transitions. [2024-06-28 00:18:33,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 878 transitions, 20932 flow [2024-06-28 00:18:33,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:18:33,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:18:33,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-28 00:18:33,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527777777777778 [2024-06-28 00:18:33,177 INFO L175 Difference]: Start difference. First operand has 375 places, 837 transitions, 18776 flow. Second operand 9 states and 163 transitions. [2024-06-28 00:18:33,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 878 transitions, 20932 flow [2024-06-28 00:18:34,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 878 transitions, 20196 flow, removed 65 selfloop flow, removed 8 redundant places. [2024-06-28 00:18:34,928 INFO L231 Difference]: Finished difference. Result has 376 places, 843 transitions, 18835 flow [2024-06-28 00:18:34,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=18092, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18835, PETRI_PLACES=376, PETRI_TRANSITIONS=843} [2024-06-28 00:18:34,928 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 335 predicate places. [2024-06-28 00:18:34,928 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 843 transitions, 18835 flow [2024-06-28 00:18:34,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:18:34,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:18:34,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:18:34,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 00:18:34,929 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)] === [2024-06-28 00:18:34,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:18:34,929 INFO L85 PathProgramCache]: Analyzing trace with hash -2117909725, now seen corresponding path program 3 times [2024-06-28 00:18:34,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:18:34,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039570193] [2024-06-28 00:18:34,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:18:34,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:18:34,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:18:36,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:18:36,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:18:36,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039570193] [2024-06-28 00:18:36,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039570193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:18:36,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:18:36,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:18:36,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573780] [2024-06-28 00:18:36,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:18:36,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:18:36,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:18:36,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:18:36,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:18:36,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:18:36,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 843 transitions, 18835 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:18:36,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:18:36,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:18:36,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:18:39,728 INFO L124 PetriNetUnfolderBase]: 5312/8173 cut-off events. [2024-06-28 00:18:39,728 INFO L125 PetriNetUnfolderBase]: For 707501/707507 co-relation queries the response was YES. [2024-06-28 00:18:39,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84138 conditions, 8173 events. 5312/8173 cut-off events. For 707501/707507 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 49159 event pairs, 1570 based on Foata normal form. 8/8178 useless extension candidates. Maximal degree in co-relation 83956. Up to 7613 conditions per place. [2024-06-28 00:18:39,845 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 765 selfloop transitions, 131 changer transitions 0/899 dead transitions. [2024-06-28 00:18:39,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 899 transitions, 21437 flow [2024-06-28 00:18:39,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:18:39,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:18:39,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-28 00:18:39,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42954545454545456 [2024-06-28 00:18:39,847 INFO L175 Difference]: Start difference. First operand has 376 places, 843 transitions, 18835 flow. Second operand 11 states and 189 transitions. [2024-06-28 00:18:39,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 899 transitions, 21437 flow [2024-06-28 00:18:41,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 899 transitions, 20770 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-28 00:18:41,567 INFO L231 Difference]: Finished difference. Result has 381 places, 853 transitions, 18724 flow [2024-06-28 00:18:41,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=18168, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=843, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=716, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=18724, PETRI_PLACES=381, PETRI_TRANSITIONS=853} [2024-06-28 00:18:41,567 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 340 predicate places. [2024-06-28 00:18:41,568 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 853 transitions, 18724 flow [2024-06-28 00:18:41,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:18:41,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:18:41,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:18:41,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 00:18:41,568 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)] === [2024-06-28 00:18:41,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:18:41,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1976986063, now seen corresponding path program 4 times [2024-06-28 00:18:41,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:18:41,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280360298] [2024-06-28 00:18:41,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:18:41,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:18:41,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:18:43,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:18:43,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:18:43,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280360298] [2024-06-28 00:18:43,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280360298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:18:43,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:18:43,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:18:43,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548284328] [2024-06-28 00:18:43,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:18:43,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:18:43,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:18:43,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:18:43,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:18:43,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:18:43,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 853 transitions, 18724 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:18:43,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:18:43,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:18:43,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:18:46,193 INFO L124 PetriNetUnfolderBase]: 5340/8219 cut-off events. [2024-06-28 00:18:46,193 INFO L125 PetriNetUnfolderBase]: For 724545/724551 co-relation queries the response was YES. [2024-06-28 00:18:46,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84448 conditions, 8219 events. 5340/8219 cut-off events. For 724545/724551 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 49580 event pairs, 1583 based on Foata normal form. 8/8224 useless extension candidates. Maximal degree in co-relation 84264. Up to 7744 conditions per place. [2024-06-28 00:18:46,336 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 773 selfloop transitions, 124 changer transitions 0/900 dead transitions. [2024-06-28 00:18:46,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 900 transitions, 20956 flow [2024-06-28 00:18:46,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:18:46,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:18:46,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 194 transitions. [2024-06-28 00:18:46,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041666666666667 [2024-06-28 00:18:46,338 INFO L175 Difference]: Start difference. First operand has 381 places, 853 transitions, 18724 flow. Second operand 12 states and 194 transitions. [2024-06-28 00:18:46,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 900 transitions, 20956 flow [2024-06-28 00:18:48,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 900 transitions, 20606 flow, removed 105 selfloop flow, removed 7 redundant places. [2024-06-28 00:18:48,319 INFO L231 Difference]: Finished difference. Result has 386 places, 857 transitions, 18774 flow [2024-06-28 00:18:48,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=18428, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=853, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=729, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=18774, PETRI_PLACES=386, PETRI_TRANSITIONS=857} [2024-06-28 00:18:48,320 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 345 predicate places. [2024-06-28 00:18:48,320 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 857 transitions, 18774 flow [2024-06-28 00:18:48,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:18:48,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:18:48,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:18:48,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 00:18:48,321 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)] === [2024-06-28 00:18:48,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:18:48,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1977193825, now seen corresponding path program 8 times [2024-06-28 00:18:48,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:18:48,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329286558] [2024-06-28 00:18:48,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:18:48,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:18:48,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:18:50,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:18:50,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:18:50,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329286558] [2024-06-28 00:18:50,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329286558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:18:50,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:18:50,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:18:50,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145396551] [2024-06-28 00:18:50,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:18:50,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:18:50,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:18:50,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:18:50,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:18:50,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:18:50,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 857 transitions, 18774 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:18:50,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:18:50,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:18:50,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:18:53,070 INFO L124 PetriNetUnfolderBase]: 5532/8539 cut-off events. [2024-06-28 00:18:53,070 INFO L125 PetriNetUnfolderBase]: For 798244/798250 co-relation queries the response was YES. [2024-06-28 00:18:53,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87158 conditions, 8539 events. 5532/8539 cut-off events. For 798244/798250 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 52078 event pairs, 1610 based on Foata normal form. 32/8568 useless extension candidates. Maximal degree in co-relation 86971. Up to 7777 conditions per place. [2024-06-28 00:18:53,237 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 785 selfloop transitions, 156 changer transitions 0/944 dead transitions. [2024-06-28 00:18:53,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 944 transitions, 21933 flow [2024-06-28 00:18:53,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:18:53,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:18:53,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 198 transitions. [2024-06-28 00:18:53,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-28 00:18:53,238 INFO L175 Difference]: Start difference. First operand has 386 places, 857 transitions, 18774 flow. Second operand 11 states and 198 transitions. [2024-06-28 00:18:53,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 944 transitions, 21933 flow [2024-06-28 00:18:55,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 944 transitions, 21636 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-28 00:18:55,797 INFO L231 Difference]: Finished difference. Result has 390 places, 888 transitions, 19644 flow [2024-06-28 00:18:55,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=18498, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=857, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=704, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=19644, PETRI_PLACES=390, PETRI_TRANSITIONS=888} [2024-06-28 00:18:55,798 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 349 predicate places. [2024-06-28 00:18:55,798 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 888 transitions, 19644 flow [2024-06-28 00:18:55,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:18:55,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:18:55,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:18:55,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 00:18:55,799 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)] === [2024-06-28 00:18:55,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:18:55,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1982550253, now seen corresponding path program 5 times [2024-06-28 00:18:55,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:18:55,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985506019] [2024-06-28 00:18:55,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:18:55,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:18:55,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:18:57,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:18:57,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:18:57,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985506019] [2024-06-28 00:18:57,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985506019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:18:57,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:18:57,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:18:57,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751817901] [2024-06-28 00:18:57,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:18:57,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:18:57,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:18:57,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:18:57,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:18:57,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:18:57,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 888 transitions, 19644 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:18:57,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:18:57,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:18:57,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:19:00,802 INFO L124 PetriNetUnfolderBase]: 5519/8511 cut-off events. [2024-06-28 00:19:00,802 INFO L125 PetriNetUnfolderBase]: For 750405/750411 co-relation queries the response was YES. [2024-06-28 00:19:00,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87272 conditions, 8511 events. 5519/8511 cut-off events. For 750405/750411 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 51815 event pairs, 1636 based on Foata normal form. 8/8516 useless extension candidates. Maximal degree in co-relation 87083. Up to 8019 conditions per place. [2024-06-28 00:19:00,931 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 791 selfloop transitions, 130 changer transitions 0/924 dead transitions. [2024-06-28 00:19:00,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 924 transitions, 21758 flow [2024-06-28 00:19:00,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:19:00,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:19:00,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-28 00:19:00,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-28 00:19:00,933 INFO L175 Difference]: Start difference. First operand has 390 places, 888 transitions, 19644 flow. Second operand 9 states and 161 transitions. [2024-06-28 00:19:00,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 924 transitions, 21758 flow [2024-06-28 00:19:03,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 924 transitions, 21546 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-28 00:19:03,279 INFO L231 Difference]: Finished difference. Result has 394 places, 888 transitions, 19704 flow [2024-06-28 00:19:03,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=19432, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=888, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=758, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=19704, PETRI_PLACES=394, PETRI_TRANSITIONS=888} [2024-06-28 00:19:03,280 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 353 predicate places. [2024-06-28 00:19:03,280 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 888 transitions, 19704 flow [2024-06-28 00:19:03,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:19:03,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:19:03,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:19:03,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 00:19:03,280 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)] === [2024-06-28 00:19:03,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:19:03,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1982704075, now seen corresponding path program 9 times [2024-06-28 00:19:03,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:19:03,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135396448] [2024-06-28 00:19:03,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:19:03,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:19:03,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:19:04,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:19:04,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:19:04,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135396448] [2024-06-28 00:19:04,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135396448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:19:04,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:19:04,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:19:04,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786399538] [2024-06-28 00:19:04,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:19:04,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:19:04,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:19:04,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:19:04,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:19:05,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:19:05,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 888 transitions, 19704 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:19:05,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:19:05,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:19:05,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:19:08,102 INFO L124 PetriNetUnfolderBase]: 5816/9005 cut-off events. [2024-06-28 00:19:08,102 INFO L125 PetriNetUnfolderBase]: For 889749/889755 co-relation queries the response was YES. [2024-06-28 00:19:08,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92980 conditions, 9005 events. 5816/9005 cut-off events. For 889749/889755 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 55696 event pairs, 1660 based on Foata normal form. 26/9028 useless extension candidates. Maximal degree in co-relation 92789. Up to 7704 conditions per place. [2024-06-28 00:19:08,249 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 791 selfloop transitions, 163 changer transitions 0/957 dead transitions. [2024-06-28 00:19:08,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 957 transitions, 22731 flow [2024-06-28 00:19:08,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:19:08,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:19:08,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-28 00:19:08,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861111111111111 [2024-06-28 00:19:08,251 INFO L175 Difference]: Start difference. First operand has 394 places, 888 transitions, 19704 flow. Second operand 9 states and 175 transitions. [2024-06-28 00:19:08,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 957 transitions, 22731 flow [2024-06-28 00:19:10,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 957 transitions, 22457 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-28 00:19:10,615 INFO L231 Difference]: Finished difference. Result has 398 places, 900 transitions, 20132 flow [2024-06-28 00:19:10,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=19436, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=888, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=727, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=20132, PETRI_PLACES=398, PETRI_TRANSITIONS=900} [2024-06-28 00:19:10,616 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 357 predicate places. [2024-06-28 00:19:10,616 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 900 transitions, 20132 flow [2024-06-28 00:19:10,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:19:10,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:19:10,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:19:10,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 00:19:10,616 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)] === [2024-06-28 00:19:10,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:19:10,616 INFO L85 PathProgramCache]: Analyzing trace with hash 764513769, now seen corresponding path program 10 times [2024-06-28 00:19:10,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:19:10,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311049390] [2024-06-28 00:19:10,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:19:10,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:19:10,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:19:12,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:19:12,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:19:12,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311049390] [2024-06-28 00:19:12,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311049390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:19:12,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:19:12,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:19:12,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771258135] [2024-06-28 00:19:12,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:19:12,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:19:12,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:19:12,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:19:12,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:19:12,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:19:12,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 900 transitions, 20132 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:19:12,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:19:12,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:19:12,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:19:15,702 INFO L124 PetriNetUnfolderBase]: 5940/9220 cut-off events. [2024-06-28 00:19:15,702 INFO L125 PetriNetUnfolderBase]: For 938688/938694 co-relation queries the response was YES. [2024-06-28 00:19:15,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95495 conditions, 9220 events. 5940/9220 cut-off events. For 938688/938694 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 57693 event pairs, 1766 based on Foata normal form. 32/9249 useless extension candidates. Maximal degree in co-relation 95301. Up to 8463 conditions per place. [2024-06-28 00:19:15,891 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 796 selfloop transitions, 152 changer transitions 0/951 dead transitions. [2024-06-28 00:19:15,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 951 transitions, 22625 flow [2024-06-28 00:19:15,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:19:15,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:19:15,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-28 00:19:15,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-28 00:19:15,893 INFO L175 Difference]: Start difference. First operand has 398 places, 900 transitions, 20132 flow. Second operand 9 states and 170 transitions. [2024-06-28 00:19:15,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 951 transitions, 22625 flow [2024-06-28 00:19:18,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 951 transitions, 22453 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-28 00:19:18,934 INFO L231 Difference]: Finished difference. Result has 404 places, 902 transitions, 20360 flow [2024-06-28 00:19:18,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=19968, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=900, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=748, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=20360, PETRI_PLACES=404, PETRI_TRANSITIONS=902} [2024-06-28 00:19:18,935 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 363 predicate places. [2024-06-28 00:19:18,935 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 902 transitions, 20360 flow [2024-06-28 00:19:18,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:19:18,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:19:18,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:19:18,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 00:19:18,936 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:19:18,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:19:18,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1982700355, now seen corresponding path program 11 times [2024-06-28 00:19:18,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:19:18,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627976991] [2024-06-28 00:19:18,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:19:18,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:19:18,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:19:20,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:19:20,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:19:20,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627976991] [2024-06-28 00:19:20,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627976991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:19:20,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:19:20,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:19:20,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77174461] [2024-06-28 00:19:20,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:19:20,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:19:20,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:19:20,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:19:20,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:19:20,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:19:20,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 902 transitions, 20360 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:19:20,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:19:20,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:19:20,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:19:23,631 INFO L124 PetriNetUnfolderBase]: 5881/9133 cut-off events. [2024-06-28 00:19:23,631 INFO L125 PetriNetUnfolderBase]: For 881163/881169 co-relation queries the response was YES. [2024-06-28 00:19:23,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93074 conditions, 9133 events. 5881/9133 cut-off events. For 881163/881169 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 57043 event pairs, 1731 based on Foata normal form. 32/9162 useless extension candidates. Maximal degree in co-relation 92878. Up to 8102 conditions per place. [2024-06-28 00:19:23,806 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 738 selfloop transitions, 214 changer transitions 0/955 dead transitions. [2024-06-28 00:19:23,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 955 transitions, 22873 flow [2024-06-28 00:19:23,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:19:23,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:19:23,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-28 00:19:23,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2024-06-28 00:19:23,807 INFO L175 Difference]: Start difference. First operand has 404 places, 902 transitions, 20360 flow. Second operand 9 states and 172 transitions. [2024-06-28 00:19:23,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 955 transitions, 22873 flow [2024-06-28 00:19:26,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 955 transitions, 22495 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-28 00:19:26,489 INFO L231 Difference]: Finished difference. Result has 407 places, 904 transitions, 20502 flow [2024-06-28 00:19:26,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=20010, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=902, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=688, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=20502, PETRI_PLACES=407, PETRI_TRANSITIONS=904} [2024-06-28 00:19:26,489 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 366 predicate places. [2024-06-28 00:19:26,490 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 904 transitions, 20502 flow [2024-06-28 00:19:26,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:19:26,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:19:26,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:19:26,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 00:19:26,490 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:19:26,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:19:26,490 INFO L85 PathProgramCache]: Analyzing trace with hash -168575829, now seen corresponding path program 1 times [2024-06-28 00:19:26,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:19:26,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330317551] [2024-06-28 00:19:26,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:19:26,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:19:26,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:19:28,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:19:28,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:19:28,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330317551] [2024-06-28 00:19:28,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330317551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:19:28,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:19:28,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:19:28,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120035019] [2024-06-28 00:19:28,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:19:28,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:19:28,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:19:28,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:19:28,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:19:28,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:19:28,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 904 transitions, 20502 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:19:28,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:19:28,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:19:28,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:19:31,450 INFO L124 PetriNetUnfolderBase]: 5764/8975 cut-off events. [2024-06-28 00:19:31,450 INFO L125 PetriNetUnfolderBase]: For 835699/835941 co-relation queries the response was YES. [2024-06-28 00:19:31,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91595 conditions, 8975 events. 5764/8975 cut-off events. For 835699/835941 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 56528 event pairs, 1680 based on Foata normal form. 200/9124 useless extension candidates. Maximal degree in co-relation 91398. Up to 8443 conditions per place. [2024-06-28 00:19:31,619 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 793 selfloop transitions, 86 changer transitions 0/933 dead transitions. [2024-06-28 00:19:31,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 933 transitions, 22667 flow [2024-06-28 00:19:31,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:19:31,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:19:31,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-28 00:19:31,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-28 00:19:31,621 INFO L175 Difference]: Start difference. First operand has 407 places, 904 transitions, 20502 flow. Second operand 8 states and 134 transitions. [2024-06-28 00:19:31,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 933 transitions, 22667 flow [2024-06-28 00:19:34,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 933 transitions, 22307 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 00:19:34,527 INFO L231 Difference]: Finished difference. Result has 409 places, 912 transitions, 20479 flow [2024-06-28 00:19:34,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=20142, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=904, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=824, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=20479, PETRI_PLACES=409, PETRI_TRANSITIONS=912} [2024-06-28 00:19:34,527 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 368 predicate places. [2024-06-28 00:19:34,527 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 912 transitions, 20479 flow [2024-06-28 00:19:34,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:19:34,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:19:34,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:19:34,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 00:19:34,528 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)] === [2024-06-28 00:19:34,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:19:34,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1802647813, now seen corresponding path program 6 times [2024-06-28 00:19:34,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:19:34,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787363821] [2024-06-28 00:19:34,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:19:34,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:19:34,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:19:36,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:19:36,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:19:36,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787363821] [2024-06-28 00:19:36,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787363821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:19:36,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:19:36,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:19:36,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077796691] [2024-06-28 00:19:36,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:19:36,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:19:36,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:19:36,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:19:36,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:19:36,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:19:36,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 912 transitions, 20479 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:19:36,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:19:36,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:19:36,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:19:39,551 INFO L124 PetriNetUnfolderBase]: 5943/9219 cut-off events. [2024-06-28 00:19:39,552 INFO L125 PetriNetUnfolderBase]: For 849159/849162 co-relation queries the response was YES. [2024-06-28 00:19:39,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93649 conditions, 9219 events. 5943/9219 cut-off events. For 849159/849162 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 57621 event pairs, 2077 based on Foata normal form. 6/9222 useless extension candidates. Maximal degree in co-relation 93450. Up to 8462 conditions per place. [2024-06-28 00:19:39,714 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 716 selfloop transitions, 233 changer transitions 0/952 dead transitions. [2024-06-28 00:19:39,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 952 transitions, 22771 flow [2024-06-28 00:19:39,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:19:39,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:19:39,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-28 00:19:39,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39 [2024-06-28 00:19:39,715 INFO L175 Difference]: Start difference. First operand has 409 places, 912 transitions, 20479 flow. Second operand 10 states and 156 transitions. [2024-06-28 00:19:39,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 952 transitions, 22771 flow [2024-06-28 00:19:42,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 952 transitions, 22629 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-28 00:19:42,308 INFO L231 Difference]: Finished difference. Result has 415 places, 920 transitions, 20996 flow [2024-06-28 00:19:42,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=20337, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=912, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=679, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=20996, PETRI_PLACES=415, PETRI_TRANSITIONS=920} [2024-06-28 00:19:42,309 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 374 predicate places. [2024-06-28 00:19:42,309 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 920 transitions, 20996 flow [2024-06-28 00:19:42,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:19:42,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:19:42,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:19:42,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 00:19:42,309 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)] === [2024-06-28 00:19:42,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:19:42,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1087069167, now seen corresponding path program 7 times [2024-06-28 00:19:42,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:19:42,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581981019] [2024-06-28 00:19:42,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:19:42,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:19:42,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:19:44,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:19:44,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:19:44,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581981019] [2024-06-28 00:19:44,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581981019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:19:44,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:19:44,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:19:44,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455345471] [2024-06-28 00:19:44,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:19:44,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:19:44,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:19:44,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:19:44,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:19:44,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:19:44,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 920 transitions, 20996 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:19:44,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:19:44,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:19:44,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:19:47,381 INFO L124 PetriNetUnfolderBase]: 5982/9289 cut-off events. [2024-06-28 00:19:47,381 INFO L125 PetriNetUnfolderBase]: For 879555/879558 co-relation queries the response was YES. [2024-06-28 00:19:47,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95123 conditions, 9289 events. 5982/9289 cut-off events. For 879555/879558 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 58234 event pairs, 2105 based on Foata normal form. 6/9292 useless extension candidates. Maximal degree in co-relation 94924. Up to 8751 conditions per place. [2024-06-28 00:19:47,556 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 824 selfloop transitions, 139 changer transitions 0/966 dead transitions. [2024-06-28 00:19:47,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 966 transitions, 23415 flow [2024-06-28 00:19:47,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:19:47,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:19:47,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 182 transitions. [2024-06-28 00:19:47,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37916666666666665 [2024-06-28 00:19:47,557 INFO L175 Difference]: Start difference. First operand has 415 places, 920 transitions, 20996 flow. Second operand 12 states and 182 transitions. [2024-06-28 00:19:47,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 966 transitions, 23415 flow [2024-06-28 00:19:50,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 966 transitions, 22868 flow, removed 47 selfloop flow, removed 8 redundant places. [2024-06-28 00:19:50,199 INFO L231 Difference]: Finished difference. Result has 419 places, 926 transitions, 20912 flow [2024-06-28 00:19:50,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=20449, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=920, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=781, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=20912, PETRI_PLACES=419, PETRI_TRANSITIONS=926} [2024-06-28 00:19:50,199 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 378 predicate places. [2024-06-28 00:19:50,199 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 926 transitions, 20912 flow [2024-06-28 00:19:50,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:19:50,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:19:50,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:19:50,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 00:19:50,200 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)] === [2024-06-28 00:19:50,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:19:50,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1950799179, now seen corresponding path program 8 times [2024-06-28 00:19:50,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:19:50,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050318955] [2024-06-28 00:19:50,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:19:50,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:19:50,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:19:51,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:19:51,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:19:51,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050318955] [2024-06-28 00:19:51,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050318955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:19:51,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:19:51,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:19:51,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417921702] [2024-06-28 00:19:51,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:19:51,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:19:51,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:19:51,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:19:51,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:19:51,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:19:51,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 926 transitions, 20912 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:19:51,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:19:51,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:19:51,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:19:55,448 INFO L124 PetriNetUnfolderBase]: 6073/9435 cut-off events. [2024-06-28 00:19:55,448 INFO L125 PetriNetUnfolderBase]: For 920287/920290 co-relation queries the response was YES. [2024-06-28 00:19:55,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96847 conditions, 9435 events. 6073/9435 cut-off events. For 920287/920290 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 59425 event pairs, 2098 based on Foata normal form. 6/9438 useless extension candidates. Maximal degree in co-relation 96647. Up to 8765 conditions per place. [2024-06-28 00:19:55,594 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 823 selfloop transitions, 155 changer transitions 0/981 dead transitions. [2024-06-28 00:19:55,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 981 transitions, 23810 flow [2024-06-28 00:19:55,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:19:55,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:19:55,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 184 transitions. [2024-06-28 00:19:55,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-28 00:19:55,596 INFO L175 Difference]: Start difference. First operand has 419 places, 926 transitions, 20912 flow. Second operand 12 states and 184 transitions. [2024-06-28 00:19:55,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 981 transitions, 23810 flow [2024-06-28 00:19:58,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 981 transitions, 23483 flow, removed 55 selfloop flow, removed 8 redundant places. [2024-06-28 00:19:58,142 INFO L231 Difference]: Finished difference. Result has 424 places, 938 transitions, 21276 flow [2024-06-28 00:19:58,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=20585, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=926, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=775, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=21276, PETRI_PLACES=424, PETRI_TRANSITIONS=938} [2024-06-28 00:19:58,143 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 383 predicate places. [2024-06-28 00:19:58,143 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 938 transitions, 21276 flow [2024-06-28 00:19:58,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:19:58,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:19:58,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:19:58,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-28 00:19:58,144 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)] === [2024-06-28 00:19:58,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:19:58,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1956370809, now seen corresponding path program 9 times [2024-06-28 00:19:58,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:19:58,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361147470] [2024-06-28 00:19:58,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:19:58,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:19:58,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:19:59,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:19:59,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:19:59,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361147470] [2024-06-28 00:19:59,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361147470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:19:59,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:19:59,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:19:59,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286802695] [2024-06-28 00:19:59,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:19:59,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:19:59,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:19:59,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:19:59,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:19:59,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:19:59,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 938 transitions, 21276 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:19:59,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:19:59,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:19:59,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:20:03,653 INFO L124 PetriNetUnfolderBase]: 6402/9993 cut-off events. [2024-06-28 00:20:03,653 INFO L125 PetriNetUnfolderBase]: For 1055729/1055732 co-relation queries the response was YES. [2024-06-28 00:20:03,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100571 conditions, 9993 events. 6402/9993 cut-off events. For 1055729/1055732 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 64073 event pairs, 2200 based on Foata normal form. 48/10038 useless extension candidates. Maximal degree in co-relation 100369. Up to 8942 conditions per place. [2024-06-28 00:20:03,849 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 847 selfloop transitions, 151 changer transitions 0/1001 dead transitions. [2024-06-28 00:20:03,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 1001 transitions, 24161 flow [2024-06-28 00:20:03,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:20:03,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:20:03,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 175 transitions. [2024-06-28 00:20:03,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-28 00:20:03,850 INFO L175 Difference]: Start difference. First operand has 424 places, 938 transitions, 21276 flow. Second operand 11 states and 175 transitions. [2024-06-28 00:20:03,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 1001 transitions, 24161 flow [2024-06-28 00:20:06,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 1001 transitions, 23785 flow, removed 110 selfloop flow, removed 8 redundant places. [2024-06-28 00:20:06,775 INFO L231 Difference]: Finished difference. Result has 428 places, 956 transitions, 21749 flow [2024-06-28 00:20:06,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=20900, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=938, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=787, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=21749, PETRI_PLACES=428, PETRI_TRANSITIONS=956} [2024-06-28 00:20:06,776 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 387 predicate places. [2024-06-28 00:20:06,777 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 956 transitions, 21749 flow [2024-06-28 00:20:06,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:20:06,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:20:06,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:20:06,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-28 00:20:06,777 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:20:06,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:20:06,778 INFO L85 PathProgramCache]: Analyzing trace with hash 134084971, now seen corresponding path program 2 times [2024-06-28 00:20:06,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:20:06,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426717200] [2024-06-28 00:20:06,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:20:06,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:20:06,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:20:08,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:20:08,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:20:08,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426717200] [2024-06-28 00:20:08,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426717200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:20:08,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:20:08,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:20:08,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607840755] [2024-06-28 00:20:08,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:20:08,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:20:08,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:20:08,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:20:08,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:20:08,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:20:08,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 956 transitions, 21749 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:20:08,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:20:08,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:20:08,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:20:11,271 INFO L124 PetriNetUnfolderBase]: 6297/9858 cut-off events. [2024-06-28 00:20:11,271 INFO L125 PetriNetUnfolderBase]: For 962525/962782 co-relation queries the response was YES. [2024-06-28 00:20:11,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99732 conditions, 9858 events. 6297/9858 cut-off events. For 962525/962782 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 63821 event pairs, 2186 based on Foata normal form. 194/9989 useless extension candidates. Maximal degree in co-relation 99527. Up to 9339 conditions per place. [2024-06-28 00:20:11,471 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 850 selfloop transitions, 80 changer transitions 0/984 dead transitions. [2024-06-28 00:20:11,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 984 transitions, 24066 flow [2024-06-28 00:20:11,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:20:11,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:20:11,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-28 00:20:11,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41785714285714287 [2024-06-28 00:20:11,472 INFO L175 Difference]: Start difference. First operand has 428 places, 956 transitions, 21749 flow. Second operand 7 states and 117 transitions. [2024-06-28 00:20:11,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 984 transitions, 24066 flow [2024-06-28 00:20:15,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 984 transitions, 23723 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-28 00:20:15,242 INFO L231 Difference]: Finished difference. Result has 428 places, 970 transitions, 21876 flow [2024-06-28 00:20:15,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=21406, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=956, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=883, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=21876, PETRI_PLACES=428, PETRI_TRANSITIONS=970} [2024-06-28 00:20:15,243 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 387 predicate places. [2024-06-28 00:20:15,243 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 970 transitions, 21876 flow [2024-06-28 00:20:15,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:20:15,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:20:15,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:20:15,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-28 00:20:15,244 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)] === [2024-06-28 00:20:15,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:20:15,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1490132231, now seen corresponding path program 10 times [2024-06-28 00:20:15,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:20:15,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542437140] [2024-06-28 00:20:15,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:20:15,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:20:15,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:20:16,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:20:16,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:20:16,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542437140] [2024-06-28 00:20:16,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542437140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:20:16,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:20:16,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:20:16,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787255014] [2024-06-28 00:20:16,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:20:16,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:20:16,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:20:16,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:20:16,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:20:16,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:20:16,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 970 transitions, 21876 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:20:16,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:20:16,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:20:16,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:20:20,825 INFO L124 PetriNetUnfolderBase]: 6458/10068 cut-off events. [2024-06-28 00:20:20,826 INFO L125 PetriNetUnfolderBase]: For 973916/973919 co-relation queries the response was YES. [2024-06-28 00:20:20,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101912 conditions, 10068 events. 6458/10068 cut-off events. For 973916/973919 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 64583 event pairs, 2292 based on Foata normal form. 8/10073 useless extension candidates. Maximal degree in co-relation 101705. Up to 9701 conditions per place. [2024-06-28 00:20:21,133 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 943 selfloop transitions, 55 changer transitions 0/1001 dead transitions. [2024-06-28 00:20:21,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 1001 transitions, 24252 flow [2024-06-28 00:20:21,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:20:21,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:20:21,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-28 00:20:21,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-28 00:20:21,135 INFO L175 Difference]: Start difference. First operand has 428 places, 970 transitions, 21876 flow. Second operand 9 states and 135 transitions. [2024-06-28 00:20:21,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 1001 transitions, 24252 flow [2024-06-28 00:20:24,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 1001 transitions, 24163 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-06-28 00:20:24,069 INFO L231 Difference]: Finished difference. Result has 435 places, 974 transitions, 22075 flow [2024-06-28 00:20:24,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=21787, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=970, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=915, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=22075, PETRI_PLACES=435, PETRI_TRANSITIONS=974} [2024-06-28 00:20:24,069 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 394 predicate places. [2024-06-28 00:20:24,069 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 974 transitions, 22075 flow [2024-06-28 00:20:24,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:20:24,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:20:24,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:20:24,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-28 00:20:24,070 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)] === [2024-06-28 00:20:24,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:20:24,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1490139671, now seen corresponding path program 11 times [2024-06-28 00:20:24,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:20:24,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083053816] [2024-06-28 00:20:24,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:20:24,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:20:24,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:20:25,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:20:25,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:20:25,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083053816] [2024-06-28 00:20:25,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083053816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:20:25,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:20:25,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:20:25,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358525720] [2024-06-28 00:20:25,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:20:25,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:20:25,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:20:25,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:20:25,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:20:25,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:20:25,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 974 transitions, 22075 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:20:25,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:20:25,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:20:25,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:20:29,676 INFO L124 PetriNetUnfolderBase]: 6531/10186 cut-off events. [2024-06-28 00:20:29,676 INFO L125 PetriNetUnfolderBase]: For 1005368/1005371 co-relation queries the response was YES. [2024-06-28 00:20:29,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103685 conditions, 10186 events. 6531/10186 cut-off events. For 1005368/1005371 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 65557 event pairs, 2295 based on Foata normal form. 8/10191 useless extension candidates. Maximal degree in co-relation 103476. Up to 9825 conditions per place. [2024-06-28 00:20:29,850 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 967 selfloop transitions, 46 changer transitions 0/1016 dead transitions. [2024-06-28 00:20:29,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 1016 transitions, 24691 flow [2024-06-28 00:20:29,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:20:29,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:20:29,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-28 00:20:29,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39444444444444443 [2024-06-28 00:20:29,852 INFO L175 Difference]: Start difference. First operand has 435 places, 974 transitions, 22075 flow. Second operand 9 states and 142 transitions. [2024-06-28 00:20:29,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 1016 transitions, 24691 flow [2024-06-28 00:20:32,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 1016 transitions, 24311 flow, removed 138 selfloop flow, removed 7 redundant places. [2024-06-28 00:20:33,012 INFO L231 Difference]: Finished difference. Result has 438 places, 984 transitions, 22167 flow [2024-06-28 00:20:33,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=21837, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=974, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=928, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=22167, PETRI_PLACES=438, PETRI_TRANSITIONS=984} [2024-06-28 00:20:33,012 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 397 predicate places. [2024-06-28 00:20:33,012 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 984 transitions, 22167 flow [2024-06-28 00:20:33,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:20:33,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:20:33,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:20:33,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-28 00:20:33,013 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)] === [2024-06-28 00:20:33,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:20:33,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1557878711, now seen corresponding path program 12 times [2024-06-28 00:20:33,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:20:33,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709131243] [2024-06-28 00:20:33,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:20:33,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:20:33,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:20:34,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:20:34,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:20:34,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709131243] [2024-06-28 00:20:34,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709131243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:20:34,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:20:34,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:20:34,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465386255] [2024-06-28 00:20:34,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:20:34,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:20:34,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:20:34,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:20:34,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:20:34,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:20:34,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 984 transitions, 22167 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:20:34,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:20:34,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:20:34,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:20:38,557 INFO L124 PetriNetUnfolderBase]: 6559/10233 cut-off events. [2024-06-28 00:20:38,557 INFO L125 PetriNetUnfolderBase]: For 1025278/1025281 co-relation queries the response was YES. [2024-06-28 00:20:38,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103975 conditions, 10233 events. 6559/10233 cut-off events. For 1025278/1025281 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 65949 event pairs, 2287 based on Foata normal form. 8/10238 useless extension candidates. Maximal degree in co-relation 103764. Up to 9921 conditions per place. [2024-06-28 00:20:38,729 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 988 selfloop transitions, 22 changer transitions 0/1013 dead transitions. [2024-06-28 00:20:38,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 1013 transitions, 24499 flow [2024-06-28 00:20:38,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:20:38,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:20:38,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-28 00:20:38,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36944444444444446 [2024-06-28 00:20:38,730 INFO L175 Difference]: Start difference. First operand has 438 places, 984 transitions, 22167 flow. Second operand 9 states and 133 transitions. [2024-06-28 00:20:38,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 1013 transitions, 24499 flow [2024-06-28 00:20:41,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 1013 transitions, 24275 flow, removed 73 selfloop flow, removed 6 redundant places. [2024-06-28 00:20:41,908 INFO L231 Difference]: Finished difference. Result has 441 places, 988 transitions, 22176 flow [2024-06-28 00:20:41,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=21943, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=984, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=962, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=22176, PETRI_PLACES=441, PETRI_TRANSITIONS=988} [2024-06-28 00:20:41,909 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 400 predicate places. [2024-06-28 00:20:41,909 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 988 transitions, 22176 flow [2024-06-28 00:20:41,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:20:41,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:20:41,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:20:41,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-28 00:20:41,910 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)] === [2024-06-28 00:20:41,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:20:41,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1233429694, now seen corresponding path program 1 times [2024-06-28 00:20:41,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:20:41,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15559003] [2024-06-28 00:20:41,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:20:41,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:20:41,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:20:43,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:20:43,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:20:43,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15559003] [2024-06-28 00:20:43,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15559003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:20:43,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:20:43,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:20:43,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332092148] [2024-06-28 00:20:43,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:20:43,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:20:43,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:20:43,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:20:43,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:20:43,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 00:20:43,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 988 transitions, 22176 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:20:43,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:20:43,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 00:20:43,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:20:47,932 INFO L124 PetriNetUnfolderBase]: 6577/10258 cut-off events. [2024-06-28 00:20:47,932 INFO L125 PetriNetUnfolderBase]: For 1035348/1035351 co-relation queries the response was YES. [2024-06-28 00:20:48,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104237 conditions, 10258 events. 6577/10258 cut-off events. For 1035348/1035351 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 66033 event pairs, 2312 based on Foata normal form. 5/10260 useless extension candidates. Maximal degree in co-relation 104025. Up to 9869 conditions per place. [2024-06-28 00:20:48,107 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 956 selfloop transitions, 63 changer transitions 0/1022 dead transitions. [2024-06-28 00:20:48,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 1022 transitions, 24618 flow [2024-06-28 00:20:48,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:20:48,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:20:48,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-28 00:20:48,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37777777777777777 [2024-06-28 00:20:48,108 INFO L175 Difference]: Start difference. First operand has 441 places, 988 transitions, 22176 flow. Second operand 9 states and 136 transitions. [2024-06-28 00:20:48,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 1022 transitions, 24618 flow [2024-06-28 00:20:51,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 1022 transitions, 24425 flow, removed 77 selfloop flow, removed 7 redundant places. [2024-06-28 00:20:51,578 INFO L231 Difference]: Finished difference. Result has 443 places, 994 transitions, 22298 flow [2024-06-28 00:20:51,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=21983, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=988, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=925, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=22298, PETRI_PLACES=443, PETRI_TRANSITIONS=994} [2024-06-28 00:20:51,580 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 402 predicate places. [2024-06-28 00:20:51,580 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 994 transitions, 22298 flow [2024-06-28 00:20:51,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:20:51,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:20:51,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:20:51,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-28 00:20:51,581 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)] === [2024-06-28 00:20:51,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:20:51,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1542054645, now seen corresponding path program 12 times [2024-06-28 00:20:51,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:20:51,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327223612] [2024-06-28 00:20:51,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:20:51,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:20:51,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat