./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix038_power.oepc_pso.oepc_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix038_power.oepc_pso.oepc_rmo.oepc.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/mix038_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix038_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 23:46:27,426 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 23:46:27,502 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 23:46:27,506 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 23:46:27,506 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 23:46:27,527 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 23:46:27,527 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 23:46:27,527 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 23:46:27,528 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 23:46:27,531 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 23:46:27,531 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 23:46:27,532 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 23:46:27,533 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 23:46:27,534 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 23:46:27,534 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 23:46:27,534 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 23:46:27,534 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 23:46:27,534 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 23:46:27,534 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 23:46:27,535 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 23:46:27,536 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 23:46:27,536 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 23:46:27,536 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 23:46:27,536 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 23:46:27,536 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 23:46:27,536 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 23:46:27,537 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 23:46:27,537 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 23:46:27,537 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 23:46:27,537 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 23:46:27,538 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 23:46:27,538 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 23:46:27,538 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 23:46:27,538 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 23:46:27,539 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 23:46:27,539 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 23:46:27,539 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 23:46:27,539 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 23:46:27,539 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 23:46:27,539 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 23:46:27,539 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 23:46:27,540 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 23:46:27,540 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 23:46:27,540 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 23:46:27,756 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 23:46:27,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 23:46:27,779 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 23:46:27,780 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 23:46:27,781 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 23:46:27,782 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix038_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-27 23:46:27,868 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 23:46:27,869 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 23:46:27,869 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix038_power.oepc_pso.oepc_rmo.oepc.i [2024-06-27 23:46:28,929 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 23:46:29,168 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 23:46:29,169 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix038_power.oepc_pso.oepc_rmo.oepc.i [2024-06-27 23:46:29,186 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7feec6fc4/4d8c16c0bf5946a1ad0aa75dcad973ae/FLAG6ce380d31 [2024-06-27 23:46:29,203 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7feec6fc4/4d8c16c0bf5946a1ad0aa75dcad973ae [2024-06-27 23:46:29,203 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 23:46:29,205 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 23:46:29,208 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 23:46:29,208 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 23:46:29,212 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 23:46:29,213 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:46:27" (1/2) ... [2024-06-27 23:46:29,213 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ac213f2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:46:29, skipping insertion in model container [2024-06-27 23:46:29,214 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:46:27" (1/2) ... [2024-06-27 23:46:29,215 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@55540255 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:46:29, skipping insertion in model container [2024-06-27 23:46:29,216 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 11:46:29" (2/2) ... [2024-06-27 23:46:29,216 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ac213f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:46:29, skipping insertion in model container [2024-06-27 23:46:29,217 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 11:46:29" (2/2) ... [2024-06-27 23:46:29,217 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 23:46:29,237 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 23:46:29,239 INFO L97 edCorrectnessWitness]: Location invariant before [L848-L848] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )z >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a$mem_tmp >= 0LL) && (0LL - (long long )a$flush_delayed) + (long long )a$r_buff0_thd1 >= 0LL) && (0LL - (long long )a$flush_delayed) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$flush_delayed) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff0_thd0) + (long long )a$r_buff0_thd1 >= 0LL) && (0LL - (long long )a$r_buff0_thd0) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff0_thd0) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff0_thd1) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff0_thd2) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff0_thd2) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff0_thd3) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff0_thd3) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff1_thd0) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff1_thd0) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff1_thd1) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff1_thd1) + (long long )a$w_buff1 >= 0LL) && (0LL - (long long )a$r_buff1_thd2) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff1_thd2) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff1_thd3) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff1_thd3) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$read_delayed) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$read_delayed) + (long long )a$w_buff0_used >= 0LL) && (1LL - (long long )a$r_buff0_thd1) + (long long )a$w_buff0_used >= 0LL) && (1LL - (long long )a$r_buff1_thd1) + (long long )a$w_buff0_used >= 0LL) && (1LL - (long long )a$w_buff0) + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_cnt + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_cnt + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_cnt + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )a$w_buff0_used >= 0LL) && (long long )a + (long long )a$r_buff0_thd1 >= 0LL) && (long long )a + (long long )a$w_buff0 >= 0LL) && (long long )a + (long long )a$w_buff0_used >= 0LL) && (long long )a$flush_delayed + (long long )a$r_buff0_thd1 >= 0LL) && (long long )a$flush_delayed + (long long )a$w_buff0 >= 0LL) && (long long )a$flush_delayed + (long long )a$w_buff0_used >= 0LL) && (long long )a$mem_tmp + (long long )a$r_buff0_thd1 >= 0LL) && (long long )a$mem_tmp + (long long )a$w_buff0 >= 0LL) && (long long )a$mem_tmp + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd0 + (long long )a$r_buff0_thd1 >= 0LL) && (long long )a$r_buff0_thd0 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd0 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff0_thd2 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff0_thd3 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff1_thd0 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff1_thd1 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff1_thd2 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff1_thd3 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$read_delayed >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$w_buff1 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$w_buff1_used >= 0LL) && (long long )a$r_buff0_thd1 + (long long )main$tmp_guard1 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )x >= 0LL) && (long long )a$r_buff0_thd1 + (long long )y >= 0LL) && (long long )a$r_buff0_thd1 + (long long )z >= 0LL) && (long long )a$r_buff0_thd1 + (long long )weak$$choice0 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )weak$$choice2 >= 0LL) && (long long )a$r_buff0_thd2 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd2 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd3 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd3 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff1_thd0 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff1_thd0 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff1_thd1 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff1_thd1 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff1_thd2 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff1_thd2 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff1_thd3 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff1_thd3 + (long long )a$w_buff0_used >= 0LL) && (long long )a$read_delayed + (long long )a$w_buff0 >= 0LL) && (long long )a$read_delayed + (long long )a$w_buff0_used >= 0LL) && (long long )a$w_buff0 + (long long )a$w_buff0_used >= 0LL) && (long long )a$w_buff0 + (long long )a$w_buff1 >= 0LL) && (long long )a$w_buff0 + (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff0 + (long long )main$tmp_guard1 >= 0LL) && (long long )a$w_buff0 + (long long )x >= 0LL) && (long long )a$w_buff0 + (long long )y >= 0LL) && (long long )a$w_buff0 + (long long )z >= 0LL) && (long long )a$w_buff0 + (long long )weak$$choice0 >= 0LL) && (long long )a$w_buff0 + (long long )weak$$choice2 >= 0LL) && (long long )a$w_buff0_used + (long long )a$w_buff1 >= 0LL) && (long long )a$w_buff0_used + (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff0_used + (long long )main$tmp_guard1 >= 0LL) && (long long )a$w_buff0_used + (long long )x >= 0LL) && (long long )a$w_buff0_used + (long long )y >= 0LL) && (long long )a$w_buff0_used + (long long )z >= 0LL) && (long long )a$w_buff0_used + (long long )weak$$choice0 >= 0LL) && (long long )a$w_buff0_used + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )a$w_buff0_used) - (long long )a$w_buff1 >= 0LL) && (long long )__unbuffered_p2_EBX - (long long )a$mem_tmp >= 0LL) && (long long )a - (long long )a$mem_tmp >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff0_thd2 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff0_thd3 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff1_thd0 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff1_thd1 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff1_thd2 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff1_thd3 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$read_delayed >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$w_buff1 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$w_buff1_used >= 0LL) && (long long )a$r_buff1_thd1 - (long long )a$w_buff1 >= 0LL) && (long long )a$r_buff1_thd1 - (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff0 - (long long )a$w_buff0_used >= 0LL) && (long long )a$w_buff0 - (long long )a$w_buff1 >= 0LL) && (long long )a$w_buff0 - (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff0_used - (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff1 - (long long )a$w_buff1_used >= 0LL) [2024-06-27 23:46:29,239 INFO L97 edCorrectnessWitness]: Location invariant before [L846-L846] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )z >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a$mem_tmp >= 0LL) && (0LL - (long long )a$flush_delayed) + (long long )a$r_buff0_thd1 >= 0LL) && (0LL - (long long )a$flush_delayed) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$flush_delayed) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff0_thd0) + (long long )a$r_buff0_thd1 >= 0LL) && (0LL - (long long )a$r_buff0_thd0) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff0_thd0) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff0_thd1) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff0_thd2) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff0_thd2) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff0_thd3) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff0_thd3) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff1_thd0) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff1_thd0) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff1_thd1) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff1_thd1) + (long long )a$w_buff1 >= 0LL) && (0LL - (long long )a$r_buff1_thd2) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff1_thd2) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff1_thd3) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff1_thd3) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$read_delayed) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$read_delayed) + (long long )a$w_buff0_used >= 0LL) && (1LL - (long long )a$r_buff0_thd1) + (long long )a$w_buff0_used >= 0LL) && (1LL - (long long )a$r_buff1_thd1) + (long long )a$w_buff0_used >= 0LL) && (1LL - (long long )a$w_buff0) + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_cnt + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_cnt + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_cnt + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )a$w_buff0_used >= 0LL) && (long long )a + (long long )a$r_buff0_thd1 >= 0LL) && (long long )a + (long long )a$w_buff0 >= 0LL) && (long long )a + (long long )a$w_buff0_used >= 0LL) && (long long )a$flush_delayed + (long long )a$r_buff0_thd1 >= 0LL) && (long long )a$flush_delayed + (long long )a$w_buff0 >= 0LL) && (long long )a$flush_delayed + (long long )a$w_buff0_used >= 0LL) && (long long )a$mem_tmp + (long long )a$r_buff0_thd1 >= 0LL) && (long long )a$mem_tmp + (long long )a$w_buff0 >= 0LL) && (long long )a$mem_tmp + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd0 + (long long )a$r_buff0_thd1 >= 0LL) && (long long )a$r_buff0_thd0 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd0 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff0_thd2 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff0_thd3 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff1_thd0 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff1_thd1 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff1_thd2 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff1_thd3 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$read_delayed >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$w_buff1 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$w_buff1_used >= 0LL) && (long long )a$r_buff0_thd1 + (long long )main$tmp_guard1 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )x >= 0LL) && (long long )a$r_buff0_thd1 + (long long )y >= 0LL) && (long long )a$r_buff0_thd1 + (long long )z >= 0LL) && (long long )a$r_buff0_thd1 + (long long )weak$$choice0 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )weak$$choice2 >= 0LL) && (long long )a$r_buff0_thd2 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd2 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd3 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd3 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff1_thd0 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff1_thd0 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff1_thd1 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff1_thd1 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff1_thd2 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff1_thd2 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff1_thd3 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff1_thd3 + (long long )a$w_buff0_used >= 0LL) && (long long )a$read_delayed + (long long )a$w_buff0 >= 0LL) && (long long )a$read_delayed + (long long )a$w_buff0_used >= 0LL) && (long long )a$w_buff0 + (long long )a$w_buff0_used >= 0LL) && (long long )a$w_buff0 + (long long )a$w_buff1 >= 0LL) && (long long )a$w_buff0 + (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff0 + (long long )main$tmp_guard1 >= 0LL) && (long long )a$w_buff0 + (long long )x >= 0LL) && (long long )a$w_buff0 + (long long )y >= 0LL) && (long long )a$w_buff0 + (long long )z >= 0LL) && (long long )a$w_buff0 + (long long )weak$$choice0 >= 0LL) && (long long )a$w_buff0 + (long long )weak$$choice2 >= 0LL) && (long long )a$w_buff0_used + (long long )a$w_buff1 >= 0LL) && (long long )a$w_buff0_used + (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff0_used + (long long )main$tmp_guard1 >= 0LL) && (long long )a$w_buff0_used + (long long )x >= 0LL) && (long long )a$w_buff0_used + (long long )y >= 0LL) && (long long )a$w_buff0_used + (long long )z >= 0LL) && (long long )a$w_buff0_used + (long long )weak$$choice0 >= 0LL) && (long long )a$w_buff0_used + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )a$w_buff0_used) - (long long )a$w_buff1 >= 0LL) && (long long )__unbuffered_p2_EBX - (long long )a$mem_tmp >= 0LL) && (long long )a - (long long )a$mem_tmp >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff0_thd2 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff0_thd3 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff1_thd0 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff1_thd1 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff1_thd2 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff1_thd3 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$read_delayed >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$w_buff1 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$w_buff1_used >= 0LL) && (long long )a$r_buff1_thd1 - (long long )a$w_buff1 >= 0LL) && (long long )a$r_buff1_thd1 - (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff0 - (long long )a$w_buff0_used >= 0LL) && (long long )a$w_buff0 - (long long )a$w_buff1 >= 0LL) && (long long )a$w_buff0 - (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff0_used - (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff1 - (long long )a$w_buff1_used >= 0LL) [2024-06-27 23:46:29,240 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )z >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a$mem_tmp >= 0LL) && (0LL - (long long )a$flush_delayed) + (long long )a$r_buff0_thd1 >= 0LL) && (0LL - (long long )a$flush_delayed) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$flush_delayed) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff0_thd0) + (long long )a$r_buff0_thd1 >= 0LL) && (0LL - (long long )a$r_buff0_thd0) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff0_thd0) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff0_thd1) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff0_thd2) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff0_thd2) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff0_thd3) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff0_thd3) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff1_thd0) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff1_thd0) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff1_thd1) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff1_thd1) + (long long )a$w_buff1 >= 0LL) && (0LL - (long long )a$r_buff1_thd2) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff1_thd2) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff1_thd3) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff1_thd3) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$read_delayed) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$read_delayed) + (long long )a$w_buff0_used >= 0LL) && (1LL - (long long )a$r_buff0_thd1) + (long long )a$w_buff0_used >= 0LL) && (1LL - (long long )a$r_buff1_thd1) + (long long )a$w_buff0_used >= 0LL) && (1LL - (long long )a$w_buff0) + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_cnt + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_cnt + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_cnt + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )a$w_buff0_used >= 0LL) && (long long )a + (long long )a$r_buff0_thd1 >= 0LL) && (long long )a + (long long )a$w_buff0 >= 0LL) && (long long )a + (long long )a$w_buff0_used >= 0LL) && (long long )a$flush_delayed + (long long )a$r_buff0_thd1 >= 0LL) && (long long )a$flush_delayed + (long long )a$w_buff0 >= 0LL) && (long long )a$flush_delayed + (long long )a$w_buff0_used >= 0LL) && (long long )a$mem_tmp + (long long )a$r_buff0_thd1 >= 0LL) && (long long )a$mem_tmp + (long long )a$w_buff0 >= 0LL) && (long long )a$mem_tmp + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd0 + (long long )a$r_buff0_thd1 >= 0LL) && (long long )a$r_buff0_thd0 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd0 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff0_thd2 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff0_thd3 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff1_thd0 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff1_thd1 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff1_thd2 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff1_thd3 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$read_delayed >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$w_buff1 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$w_buff1_used >= 0LL) && (long long )a$r_buff0_thd1 + (long long )main$tmp_guard1 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )x >= 0LL) && (long long )a$r_buff0_thd1 + (long long )y >= 0LL) && (long long )a$r_buff0_thd1 + (long long )z >= 0LL) && (long long )a$r_buff0_thd1 + (long long )weak$$choice0 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )weak$$choice2 >= 0LL) && (long long )a$r_buff0_thd2 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd2 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd3 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd3 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff1_thd0 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff1_thd0 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff1_thd1 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff1_thd1 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff1_thd2 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff1_thd2 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff1_thd3 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff1_thd3 + (long long )a$w_buff0_used >= 0LL) && (long long )a$read_delayed + (long long )a$w_buff0 >= 0LL) && (long long )a$read_delayed + (long long )a$w_buff0_used >= 0LL) && (long long )a$w_buff0 + (long long )a$w_buff0_used >= 0LL) && (long long )a$w_buff0 + (long long )a$w_buff1 >= 0LL) && (long long )a$w_buff0 + (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff0 + (long long )main$tmp_guard1 >= 0LL) && (long long )a$w_buff0 + (long long )x >= 0LL) && (long long )a$w_buff0 + (long long )y >= 0LL) && (long long )a$w_buff0 + (long long )z >= 0LL) && (long long )a$w_buff0 + (long long )weak$$choice0 >= 0LL) && (long long )a$w_buff0 + (long long )weak$$choice2 >= 0LL) && (long long )a$w_buff0_used + (long long )a$w_buff1 >= 0LL) && (long long )a$w_buff0_used + (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff0_used + (long long )main$tmp_guard1 >= 0LL) && (long long )a$w_buff0_used + (long long )x >= 0LL) && (long long )a$w_buff0_used + (long long )y >= 0LL) && (long long )a$w_buff0_used + (long long )z >= 0LL) && (long long )a$w_buff0_used + (long long )weak$$choice0 >= 0LL) && (long long )a$w_buff0_used + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )a$w_buff0_used) - (long long )a$w_buff1 >= 0LL) && (long long )__unbuffered_p2_EBX - (long long )a$mem_tmp >= 0LL) && (long long )a - (long long )a$mem_tmp >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff0_thd2 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff0_thd3 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff1_thd0 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff1_thd1 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff1_thd2 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff1_thd3 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$read_delayed >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$w_buff1 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$w_buff1_used >= 0LL) && (long long )a$r_buff1_thd1 - (long long )a$w_buff1 >= 0LL) && (long long )a$r_buff1_thd1 - (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff0 - (long long )a$w_buff0_used >= 0LL) && (long long )a$w_buff0 - (long long )a$w_buff1 >= 0LL) && (long long )a$w_buff0 - (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff0_used - (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff1 - (long long )a$w_buff1_used >= 0LL) [2024-06-27 23:46:29,240 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 23:46:29,240 INFO L106 edCorrectnessWitness]: ghost_update [L844-L844] multithreaded = 1; [2024-06-27 23:46:29,277 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 23:46:29,624 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 23:46:29,632 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 23:46:29,837 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 23:46:29,889 INFO L206 MainTranslator]: Completed translation [2024-06-27 23:46:29,890 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:46:29 WrapperNode [2024-06-27 23:46:29,890 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 23:46:29,891 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 23:46:29,891 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 23:46:29,892 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 23:46:29,897 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:46:29" (1/1) ... [2024-06-27 23:46:29,921 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:46:29" (1/1) ... [2024-06-27 23:46:29,965 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 127 [2024-06-27 23:46:29,966 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 23:46:29,967 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 23:46:29,967 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 23:46:29,967 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 23:46:29,975 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:46:29" (1/1) ... [2024-06-27 23:46:29,976 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:46:29" (1/1) ... [2024-06-27 23:46:29,983 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:46:29" (1/1) ... [2024-06-27 23:46:30,001 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 23:46:30,002 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:46:29" (1/1) ... [2024-06-27 23:46:30,002 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:46:29" (1/1) ... [2024-06-27 23:46:30,015 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:46:29" (1/1) ... [2024-06-27 23:46:30,025 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:46:29" (1/1) ... [2024-06-27 23:46:30,032 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:46:29" (1/1) ... [2024-06-27 23:46:30,039 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:46:29" (1/1) ... [2024-06-27 23:46:30,048 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 23:46:30,049 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 23:46:30,049 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 23:46:30,049 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 23:46:30,050 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:46:29" (1/1) ... [2024-06-27 23:46:30,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 23:46:30,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 23:46:30,073 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 23:46:30,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 23:46:30,103 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 23:46:30,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 23:46:30,104 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 23:46:30,104 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 23:46:30,104 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 23:46:30,104 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 23:46:30,105 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 23:46:30,105 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 23:46:30,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 23:46:30,105 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 23:46:30,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 23:46:30,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 23:46:30,106 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 23:46:30,204 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 23:46:30,205 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 23:46:30,758 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 23:46:30,758 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 23:46:30,907 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 23:46:30,907 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 23:46:30,908 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 11:46:30 BoogieIcfgContainer [2024-06-27 23:46:30,908 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 23:46:30,910 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 23:46:30,910 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 23:46:30,912 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 23:46:30,912 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:46:27" (1/4) ... [2024-06-27 23:46:30,913 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7caf2a69 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 11:46:30, skipping insertion in model container [2024-06-27 23:46:30,914 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 11:46:29" (2/4) ... [2024-06-27 23:46:30,914 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7caf2a69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 11:46:30, skipping insertion in model container [2024-06-27 23:46:30,914 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:46:29" (3/4) ... [2024-06-27 23:46:30,915 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7caf2a69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 11:46:30, skipping insertion in model container [2024-06-27 23:46:30,915 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 11:46:30" (4/4) ... [2024-06-27 23:46:30,916 INFO L112 eAbstractionObserver]: Analyzing ICFG mix038_power.oepc_pso.oepc_rmo.oepc.i [2024-06-27 23:46:30,930 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 23:46:30,930 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 23:46:30,930 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 23:46:30,977 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 23:46:31,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 23:46:31,034 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-27 23:46:31,035 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 23:46:31,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 23:46:31,038 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 23:46:31,040 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-27 23:46:31,052 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 23:46:31,058 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;@4876fd94, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 23:46:31,058 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 23:46:31,064 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 23:46:31,064 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-27 23:46:31,064 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 23:46:31,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:31,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 23:46:31,065 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)] === [2024-06-27 23:46:31,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:31,073 INFO L85 PathProgramCache]: Analyzing trace with hash 377005303, now seen corresponding path program 1 times [2024-06-27 23:46:31,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:31,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524623430] [2024-06-27 23:46:31,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:31,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:31,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:32,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:46:32,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:32,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524623430] [2024-06-27 23:46:32,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524623430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:32,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:32,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 23:46:32,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376267350] [2024-06-27 23:46:32,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:32,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 23:46:32,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:32,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 23:46:32,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 23:46:32,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:46:32,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:32,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:32,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:46:32,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:33,002 INFO L124 PetriNetUnfolderBase]: 1570/2419 cut-off events. [2024-06-27 23:46:33,003 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-06-27 23:46:33,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4840 conditions, 2419 events. 1570/2419 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11765 event pairs, 1123 based on Foata normal form. 1/2344 useless extension candidates. Maximal degree in co-relation 4828. Up to 2334 conditions per place. [2024-06-27 23:46:33,020 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 33 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-27 23:46:33,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 175 flow [2024-06-27 23:46:33,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 23:46:33,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 23:46:33,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2024-06-27 23:46:33,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-06-27 23:46:33,032 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 76 transitions. [2024-06-27 23:46:33,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 175 flow [2024-06-27 23:46:33,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 23:46:33,037 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-27 23:46:33,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-27 23:46:33,041 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-27 23:46:33,042 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-27 23:46:33,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:33,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:33,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:33,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 23:46:33,043 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)] === [2024-06-27 23:46:33,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:33,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1524958000, now seen corresponding path program 1 times [2024-06-27 23:46:33,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:33,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183457090] [2024-06-27 23:46:33,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:33,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:33,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:34,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:46:34,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:34,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183457090] [2024-06-27 23:46:34,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183457090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:34,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:34,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 23:46:34,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6000356] [2024-06-27 23:46:34,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:34,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 23:46:34,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:34,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 23:46:34,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 23:46:34,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:46:34,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:34,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:34,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:46:34,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:34,642 INFO L124 PetriNetUnfolderBase]: 1564/2415 cut-off events. [2024-06-27 23:46:34,642 INFO L125 PetriNetUnfolderBase]: For 445/445 co-relation queries the response was YES. [2024-06-27 23:46:34,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5442 conditions, 2415 events. 1564/2415 cut-off events. For 445/445 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11736 event pairs, 981 based on Foata normal form. 3/2381 useless extension candidates. Maximal degree in co-relation 5430. Up to 2310 conditions per place. [2024-06-27 23:46:34,654 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 40 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-27 23:46:34,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 242 flow [2024-06-27 23:46:34,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 23:46:34,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 23:46:34,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-06-27 23:46:34,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-27 23:46:34,656 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 98 transitions. [2024-06-27 23:46:34,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 242 flow [2024-06-27 23:46:34,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 23:46:34,658 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-27 23:46:34,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-27 23:46:34,659 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-27 23:46:34,659 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-27 23:46:34,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:34,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:34,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:34,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 23:46:34,660 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)] === [2024-06-27 23:46:34,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:34,660 INFO L85 PathProgramCache]: Analyzing trace with hash 29058686, now seen corresponding path program 1 times [2024-06-27 23:46:34,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:34,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501023870] [2024-06-27 23:46:34,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:34,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:34,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:35,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:46:35,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:35,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501023870] [2024-06-27 23:46:35,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501023870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:35,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:35,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:46:35,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020650112] [2024-06-27 23:46:35,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:35,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:46:35,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:35,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:46:35,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:46:35,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:46:35,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:35,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:35,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:46:35,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:36,272 INFO L124 PetriNetUnfolderBase]: 1618/2518 cut-off events. [2024-06-27 23:46:36,273 INFO L125 PetriNetUnfolderBase]: For 1322/1322 co-relation queries the response was YES. [2024-06-27 23:46:36,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6269 conditions, 2518 events. 1618/2518 cut-off events. For 1322/1322 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 12392 event pairs, 739 based on Foata normal form. 7/2510 useless extension candidates. Maximal degree in co-relation 6255. Up to 2279 conditions per place. [2024-06-27 23:46:36,286 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 55 selfloop transitions, 16 changer transitions 0/77 dead transitions. [2024-06-27 23:46:36,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 77 transitions, 404 flow [2024-06-27 23:46:36,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:46:36,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:46:36,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-27 23:46:36,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-27 23:46:36,288 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 130 transitions. [2024-06-27 23:46:36,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 77 transitions, 404 flow [2024-06-27 23:46:36,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 77 transitions, 390 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 23:46:36,291 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 239 flow [2024-06-27 23:46:36,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=239, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-06-27 23:46:36,292 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-27 23:46:36,292 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 239 flow [2024-06-27 23:46:36,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:36,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:36,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:36,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 23:46:36,293 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)] === [2024-06-27 23:46:36,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:36,294 INFO L85 PathProgramCache]: Analyzing trace with hash 817703349, now seen corresponding path program 1 times [2024-06-27 23:46:36,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:36,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667504425] [2024-06-27 23:46:36,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:36,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:36,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:37,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:46:37,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:37,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667504425] [2024-06-27 23:46:37,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667504425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:37,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:37,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:46:37,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21896706] [2024-06-27 23:46:37,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:37,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:46:37,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:37,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:46:37,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:46:37,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:46:37,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 239 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:37,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:37,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:46:37,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:38,150 INFO L124 PetriNetUnfolderBase]: 1640/2541 cut-off events. [2024-06-27 23:46:38,150 INFO L125 PetriNetUnfolderBase]: For 3272/3272 co-relation queries the response was YES. [2024-06-27 23:46:38,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7658 conditions, 2541 events. 1640/2541 cut-off events. For 3272/3272 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12674 event pairs, 559 based on Foata normal form. 7/2538 useless extension candidates. Maximal degree in co-relation 7641. Up to 2222 conditions per place. [2024-06-27 23:46:38,165 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 66 selfloop transitions, 28 changer transitions 0/100 dead transitions. [2024-06-27 23:46:38,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 100 transitions, 633 flow [2024-06-27 23:46:38,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:46:38,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:46:38,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-27 23:46:38,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-06-27 23:46:38,170 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 239 flow. Second operand 6 states and 157 transitions. [2024-06-27 23:46:38,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 100 transitions, 633 flow [2024-06-27 23:46:38,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 100 transitions, 625 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-27 23:46:38,177 INFO L231 Difference]: Finished difference. Result has 60 places, 63 transitions, 418 flow [2024-06-27 23:46:38,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=418, PETRI_PLACES=60, PETRI_TRANSITIONS=63} [2024-06-27 23:46:38,179 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 17 predicate places. [2024-06-27 23:46:38,179 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 63 transitions, 418 flow [2024-06-27 23:46:38,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:38,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:38,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:38,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 23:46:38,180 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)] === [2024-06-27 23:46:38,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:38,181 INFO L85 PathProgramCache]: Analyzing trace with hash -2139342659, now seen corresponding path program 1 times [2024-06-27 23:46:38,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:38,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119014110] [2024-06-27 23:46:38,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:38,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:38,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:39,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:46:39,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:39,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119014110] [2024-06-27 23:46:39,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119014110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:39,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:39,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:46:39,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335522107] [2024-06-27 23:46:39,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:39,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:46:39,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:39,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:46:39,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:46:39,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:46:39,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 63 transitions, 418 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:39,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:39,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:46:39,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:40,252 INFO L124 PetriNetUnfolderBase]: 1722/2703 cut-off events. [2024-06-27 23:46:40,252 INFO L125 PetriNetUnfolderBase]: For 6407/6407 co-relation queries the response was YES. [2024-06-27 23:46:40,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9511 conditions, 2703 events. 1722/2703 cut-off events. For 6407/6407 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13849 event pairs, 410 based on Foata normal form. 26/2717 useless extension candidates. Maximal degree in co-relation 9488. Up to 2186 conditions per place. [2024-06-27 23:46:40,273 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 74 selfloop transitions, 30 changer transitions 0/110 dead transitions. [2024-06-27 23:46:40,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 110 transitions, 808 flow [2024-06-27 23:46:40,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:46:40,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:46:40,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-27 23:46:40,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-27 23:46:40,276 INFO L175 Difference]: Start difference. First operand has 60 places, 63 transitions, 418 flow. Second operand 7 states and 179 transitions. [2024-06-27 23:46:40,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 110 transitions, 808 flow [2024-06-27 23:46:40,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 110 transitions, 792 flow, removed 8 selfloop flow, removed 0 redundant places. [2024-06-27 23:46:40,288 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 484 flow [2024-06-27 23:46:40,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=484, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2024-06-27 23:46:40,291 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-27 23:46:40,291 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 484 flow [2024-06-27 23:46:40,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:40,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:40,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:40,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 23:46:40,303 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)] === [2024-06-27 23:46:40,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:40,303 INFO L85 PathProgramCache]: Analyzing trace with hash -856778795, now seen corresponding path program 1 times [2024-06-27 23:46:40,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:40,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597887546] [2024-06-27 23:46:40,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:40,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:40,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:41,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:46:41,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:41,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597887546] [2024-06-27 23:46:41,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597887546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:41,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:41,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:46:41,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943284569] [2024-06-27 23:46:41,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:41,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:46:41,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:41,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:46:41,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:46:41,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:46:41,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 484 flow. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:41,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:41,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:46:41,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:42,353 INFO L124 PetriNetUnfolderBase]: 1712/2689 cut-off events. [2024-06-27 23:46:42,353 INFO L125 PetriNetUnfolderBase]: For 8708/8708 co-relation queries the response was YES. [2024-06-27 23:46:42,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9971 conditions, 2689 events. 1712/2689 cut-off events. For 8708/8708 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13835 event pairs, 928 based on Foata normal form. 4/2675 useless extension candidates. Maximal degree in co-relation 9944. Up to 2551 conditions per place. [2024-06-27 23:46:42,380 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 59 selfloop transitions, 12 changer transitions 0/76 dead transitions. [2024-06-27 23:46:42,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 76 transitions, 670 flow [2024-06-27 23:46:42,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:46:42,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:46:42,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2024-06-27 23:46:42,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-27 23:46:42,381 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 484 flow. Second operand 5 states and 98 transitions. [2024-06-27 23:46:42,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 76 transitions, 670 flow [2024-06-27 23:46:42,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 76 transitions, 598 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 23:46:42,390 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 469 flow [2024-06-27 23:46:42,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=469, PETRI_PLACES=67, PETRI_TRANSITIONS=66} [2024-06-27 23:46:42,392 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 24 predicate places. [2024-06-27 23:46:42,392 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 469 flow [2024-06-27 23:46:42,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:42,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:42,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:42,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 23:46:42,393 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)] === [2024-06-27 23:46:42,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:42,394 INFO L85 PathProgramCache]: Analyzing trace with hash 886125884, now seen corresponding path program 1 times [2024-06-27 23:46:42,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:42,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175179124] [2024-06-27 23:46:42,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:42,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:42,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:43,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:46:43,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:43,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175179124] [2024-06-27 23:46:43,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175179124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:43,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:43,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:46:43,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247248539] [2024-06-27 23:46:43,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:43,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:46:43,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:43,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:46:43,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:46:43,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:46:43,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 469 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 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) [2024-06-27 23:46:43,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:43,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:46:43,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:44,685 INFO L124 PetriNetUnfolderBase]: 1791/2820 cut-off events. [2024-06-27 23:46:44,685 INFO L125 PetriNetUnfolderBase]: For 9286/9294 co-relation queries the response was YES. [2024-06-27 23:46:44,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10510 conditions, 2820 events. 1791/2820 cut-off events. For 9286/9294 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 14459 event pairs, 566 based on Foata normal form. 12/2820 useless extension candidates. Maximal degree in co-relation 10480. Up to 2554 conditions per place. [2024-06-27 23:46:44,699 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 78 selfloop transitions, 28 changer transitions 0/111 dead transitions. [2024-06-27 23:46:44,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 111 transitions, 961 flow [2024-06-27 23:46:44,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:46:44,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:46:44,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-27 23:46:44,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48639455782312924 [2024-06-27 23:46:44,701 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 469 flow. Second operand 7 states and 143 transitions. [2024-06-27 23:46:44,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 111 transitions, 961 flow [2024-06-27 23:46:44,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 111 transitions, 930 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 23:46:44,709 INFO L231 Difference]: Finished difference. Result has 73 places, 85 transitions, 694 flow [2024-06-27 23:46:44,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=694, PETRI_PLACES=73, PETRI_TRANSITIONS=85} [2024-06-27 23:46:44,710 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-27 23:46:44,710 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 85 transitions, 694 flow [2024-06-27 23:46:44,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 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) [2024-06-27 23:46:44,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:44,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:44,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 23:46:44,710 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)] === [2024-06-27 23:46:44,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:44,711 INFO L85 PathProgramCache]: Analyzing trace with hash 347547538, now seen corresponding path program 2 times [2024-06-27 23:46:44,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:44,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022808438] [2024-06-27 23:46:44,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:44,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:44,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:46,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:46:46,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:46,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022808438] [2024-06-27 23:46:46,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022808438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:46,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:46,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:46:46,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130222519] [2024-06-27 23:46:46,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:46,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:46:46,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:46,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:46:46,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:46:46,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:46:46,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 85 transitions, 694 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 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) [2024-06-27 23:46:46,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:46,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:46:46,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:46,670 INFO L124 PetriNetUnfolderBase]: 1888/2961 cut-off events. [2024-06-27 23:46:46,670 INFO L125 PetriNetUnfolderBase]: For 12754/12754 co-relation queries the response was YES. [2024-06-27 23:46:46,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12122 conditions, 2961 events. 1888/2961 cut-off events. For 12754/12754 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 15216 event pairs, 876 based on Foata normal form. 10/2953 useless extension candidates. Maximal degree in co-relation 12089. Up to 2639 conditions per place. [2024-06-27 23:46:46,689 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 87 selfloop transitions, 37 changer transitions 0/129 dead transitions. [2024-06-27 23:46:46,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 129 transitions, 1319 flow [2024-06-27 23:46:46,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:46:46,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:46:46,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-27 23:46:46,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-27 23:46:46,691 INFO L175 Difference]: Start difference. First operand has 73 places, 85 transitions, 694 flow. Second operand 6 states and 123 transitions. [2024-06-27 23:46:46,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 129 transitions, 1319 flow [2024-06-27 23:46:46,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 129 transitions, 1282 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-27 23:46:46,704 INFO L231 Difference]: Finished difference. Result has 78 places, 105 transitions, 1050 flow [2024-06-27 23:46:46,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=671, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1050, PETRI_PLACES=78, PETRI_TRANSITIONS=105} [2024-06-27 23:46:46,705 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 35 predicate places. [2024-06-27 23:46:46,705 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 105 transitions, 1050 flow [2024-06-27 23:46:46,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 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) [2024-06-27 23:46:46,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:46,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:46,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 23:46:46,706 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)] === [2024-06-27 23:46:46,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:46,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1270084288, now seen corresponding path program 3 times [2024-06-27 23:46:46,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:46,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186671311] [2024-06-27 23:46:46,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:46,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:46,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:47,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:46:47,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:47,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186671311] [2024-06-27 23:46:47,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186671311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:47,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:47,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:46:47,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342402917] [2024-06-27 23:46:47,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:47,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:46:47,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:47,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:46:47,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:46:47,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:46:47,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 105 transitions, 1050 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 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) [2024-06-27 23:46:47,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:47,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:46:47,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:48,493 INFO L124 PetriNetUnfolderBase]: 1860/2918 cut-off events. [2024-06-27 23:46:48,493 INFO L125 PetriNetUnfolderBase]: For 14872/14872 co-relation queries the response was YES. [2024-06-27 23:46:48,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12372 conditions, 2918 events. 1860/2918 cut-off events. For 14872/14872 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 14924 event pairs, 880 based on Foata normal form. 5/2906 useless extension candidates. Maximal degree in co-relation 12336. Up to 2749 conditions per place. [2024-06-27 23:46:48,511 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 103 selfloop transitions, 15 changer transitions 0/123 dead transitions. [2024-06-27 23:46:48,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 123 transitions, 1360 flow [2024-06-27 23:46:48,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:46:48,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:46:48,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-27 23:46:48,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-27 23:46:48,513 INFO L175 Difference]: Start difference. First operand has 78 places, 105 transitions, 1050 flow. Second operand 6 states and 115 transitions. [2024-06-27 23:46:48,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 123 transitions, 1360 flow [2024-06-27 23:46:48,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 123 transitions, 1337 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-27 23:46:48,533 INFO L231 Difference]: Finished difference. Result has 83 places, 106 transitions, 1085 flow [2024-06-27 23:46:48,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1027, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1085, PETRI_PLACES=83, PETRI_TRANSITIONS=106} [2024-06-27 23:46:48,535 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 40 predicate places. [2024-06-27 23:46:48,535 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 106 transitions, 1085 flow [2024-06-27 23:46:48,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 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) [2024-06-27 23:46:48,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:48,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:48,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 23:46:48,535 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)] === [2024-06-27 23:46:48,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:48,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1933549244, now seen corresponding path program 1 times [2024-06-27 23:46:48,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:48,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080315539] [2024-06-27 23:46:48,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:48,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:48,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:50,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:46:50,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:50,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080315539] [2024-06-27 23:46:50,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080315539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:50,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:50,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:46:50,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667267530] [2024-06-27 23:46:50,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:50,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:46:50,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:50,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:46:50,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:46:50,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:46:50,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 106 transitions, 1085 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) [2024-06-27 23:46:50,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:50,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:46:50,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:51,686 INFO L124 PetriNetUnfolderBase]: 2310/3556 cut-off events. [2024-06-27 23:46:51,686 INFO L125 PetriNetUnfolderBase]: For 20316/20316 co-relation queries the response was YES. [2024-06-27 23:46:51,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15254 conditions, 3556 events. 2310/3556 cut-off events. For 20316/20316 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 17603 event pairs, 1119 based on Foata normal form. 4/3542 useless extension candidates. Maximal degree in co-relation 15215. Up to 3382 conditions per place. [2024-06-27 23:46:51,706 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 109 selfloop transitions, 18 changer transitions 0/131 dead transitions. [2024-06-27 23:46:51,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 131 transitions, 1452 flow [2024-06-27 23:46:51,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:46:51,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:46:51,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 23:46:51,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 23:46:51,708 INFO L175 Difference]: Start difference. First operand has 83 places, 106 transitions, 1085 flow. Second operand 8 states and 136 transitions. [2024-06-27 23:46:51,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 131 transitions, 1452 flow [2024-06-27 23:46:51,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 131 transitions, 1409 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 23:46:51,728 INFO L231 Difference]: Finished difference. Result has 88 places, 112 transitions, 1157 flow [2024-06-27 23:46:51,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1045, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1157, PETRI_PLACES=88, PETRI_TRANSITIONS=112} [2024-06-27 23:46:51,729 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2024-06-27 23:46:51,729 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 112 transitions, 1157 flow [2024-06-27 23:46:51,730 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) [2024-06-27 23:46:51,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:51,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:51,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 23:46:51,730 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:46:51,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:51,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1517424716, now seen corresponding path program 1 times [2024-06-27 23:46:51,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:51,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683310049] [2024-06-27 23:46:51,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:51,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:51,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:53,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:46:53,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:53,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683310049] [2024-06-27 23:46:53,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683310049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:53,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:53,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:46:53,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85868749] [2024-06-27 23:46:53,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:53,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:46:53,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:53,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:46:53,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:46:53,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:46:53,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 112 transitions, 1157 flow. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:53,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:53,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:46:53,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:53,787 INFO L124 PetriNetUnfolderBase]: 2307/3554 cut-off events. [2024-06-27 23:46:53,787 INFO L125 PetriNetUnfolderBase]: For 23001/23001 co-relation queries the response was YES. [2024-06-27 23:46:53,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15878 conditions, 3554 events. 2307/3554 cut-off events. For 23001/23001 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 17553 event pairs, 1139 based on Foata normal form. 1/3554 useless extension candidates. Maximal degree in co-relation 15838. Up to 3425 conditions per place. [2024-06-27 23:46:53,805 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 108 selfloop transitions, 10 changer transitions 0/122 dead transitions. [2024-06-27 23:46:53,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 122 transitions, 1439 flow [2024-06-27 23:46:53,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:46:53,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:46:53,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-27 23:46:53,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-27 23:46:53,807 INFO L175 Difference]: Start difference. First operand has 88 places, 112 transitions, 1157 flow. Second operand 5 states and 89 transitions. [2024-06-27 23:46:53,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 122 transitions, 1439 flow [2024-06-27 23:46:53,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 122 transitions, 1392 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 23:46:53,826 INFO L231 Difference]: Finished difference. Result has 88 places, 115 transitions, 1166 flow [2024-06-27 23:46:53,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1110, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1166, PETRI_PLACES=88, PETRI_TRANSITIONS=115} [2024-06-27 23:46:53,826 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2024-06-27 23:46:53,826 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 115 transitions, 1166 flow [2024-06-27 23:46:53,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:53,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:53,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:53,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 23:46:53,827 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)] === [2024-06-27 23:46:53,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:53,827 INFO L85 PathProgramCache]: Analyzing trace with hash 981653929, now seen corresponding path program 1 times [2024-06-27 23:46:53,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:53,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994059177] [2024-06-27 23:46:53,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:53,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:53,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:55,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:46:55,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:55,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994059177] [2024-06-27 23:46:55,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994059177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:55,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:55,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:46:55,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015819480] [2024-06-27 23:46:55,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:55,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:46:55,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:55,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:46:55,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:46:55,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:46:55,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 115 transitions, 1166 flow. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:55,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:55,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:46:55,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:56,389 INFO L124 PetriNetUnfolderBase]: 2168/3380 cut-off events. [2024-06-27 23:46:56,389 INFO L125 PetriNetUnfolderBase]: For 24762/24807 co-relation queries the response was YES. [2024-06-27 23:46:56,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15420 conditions, 3380 events. 2168/3380 cut-off events. For 24762/24807 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 17527 event pairs, 657 based on Foata normal form. 25/3395 useless extension candidates. Maximal degree in co-relation 15379. Up to 2757 conditions per place. [2024-06-27 23:46:56,412 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 84 selfloop transitions, 60 changer transitions 0/150 dead transitions. [2024-06-27 23:46:56,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 150 transitions, 1686 flow [2024-06-27 23:46:56,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:46:56,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:46:56,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-27 23:46:56,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-27 23:46:56,414 INFO L175 Difference]: Start difference. First operand has 88 places, 115 transitions, 1166 flow. Second operand 6 states and 138 transitions. [2024-06-27 23:46:56,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 150 transitions, 1686 flow [2024-06-27 23:46:56,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 150 transitions, 1652 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 23:46:56,438 INFO L231 Difference]: Finished difference. Result has 91 places, 121 transitions, 1314 flow [2024-06-27 23:46:56,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1132, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1314, PETRI_PLACES=91, PETRI_TRANSITIONS=121} [2024-06-27 23:46:56,439 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 48 predicate places. [2024-06-27 23:46:56,439 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 121 transitions, 1314 flow [2024-06-27 23:46:56,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:56,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:56,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:56,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 23:46:56,440 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)] === [2024-06-27 23:46:56,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:56,441 INFO L85 PathProgramCache]: Analyzing trace with hash 985376719, now seen corresponding path program 2 times [2024-06-27 23:46:56,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:56,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792269299] [2024-06-27 23:46:56,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:56,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:56,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:58,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:46:58,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:58,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792269299] [2024-06-27 23:46:58,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792269299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:58,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:58,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:46:58,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138769141] [2024-06-27 23:46:58,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:58,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:46:58,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:58,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:46:58,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:46:58,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:46:58,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 121 transitions, 1314 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:58,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:58,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:46:58,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:58,901 INFO L124 PetriNetUnfolderBase]: 2148/3360 cut-off events. [2024-06-27 23:46:58,901 INFO L125 PetriNetUnfolderBase]: For 28786/28811 co-relation queries the response was YES. [2024-06-27 23:46:58,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16119 conditions, 3360 events. 2148/3360 cut-off events. For 28786/28811 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17392 event pairs, 664 based on Foata normal form. 22/3374 useless extension candidates. Maximal degree in co-relation 16078. Up to 2839 conditions per place. [2024-06-27 23:46:58,920 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 79 selfloop transitions, 64 changer transitions 0/149 dead transitions. [2024-06-27 23:46:58,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 149 transitions, 1790 flow [2024-06-27 23:46:58,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:46:58,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:46:58,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-27 23:46:58,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170068027210885 [2024-06-27 23:46:58,921 INFO L175 Difference]: Start difference. First operand has 91 places, 121 transitions, 1314 flow. Second operand 7 states and 152 transitions. [2024-06-27 23:46:58,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 149 transitions, 1790 flow [2024-06-27 23:46:58,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 149 transitions, 1705 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-27 23:46:58,946 INFO L231 Difference]: Finished difference. Result has 96 places, 121 transitions, 1370 flow [2024-06-27 23:46:58,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1229, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1370, PETRI_PLACES=96, PETRI_TRANSITIONS=121} [2024-06-27 23:46:58,946 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-06-27 23:46:58,946 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 121 transitions, 1370 flow [2024-06-27 23:46:58,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:58,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:58,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:58,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 23:46:58,947 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)] === [2024-06-27 23:46:58,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:58,947 INFO L85 PathProgramCache]: Analyzing trace with hash 247420473, now seen corresponding path program 1 times [2024-06-27 23:46:58,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:58,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713476712] [2024-06-27 23:46:58,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:58,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:58,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:00,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:47:00,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:00,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713476712] [2024-06-27 23:47:00,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713476712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:00,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:00,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:47:00,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945452870] [2024-06-27 23:47:00,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:00,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:47:00,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:00,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:47:00,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:47:01,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:47:01,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 121 transitions, 1370 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) [2024-06-27 23:47:01,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:01,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:47:01,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:01,895 INFO L124 PetriNetUnfolderBase]: 2354/3616 cut-off events. [2024-06-27 23:47:01,896 INFO L125 PetriNetUnfolderBase]: For 33922/33946 co-relation queries the response was YES. [2024-06-27 23:47:01,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18214 conditions, 3616 events. 2354/3616 cut-off events. For 33922/33946 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 17849 event pairs, 675 based on Foata normal form. 22/3637 useless extension candidates. Maximal degree in co-relation 18170. Up to 3083 conditions per place. [2024-06-27 23:47:01,918 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 94 selfloop transitions, 73 changer transitions 0/171 dead transitions. [2024-06-27 23:47:01,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 171 transitions, 2147 flow [2024-06-27 23:47:01,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:47:01,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:47:01,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 23:47:01,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-27 23:47:01,919 INFO L175 Difference]: Start difference. First operand has 96 places, 121 transitions, 1370 flow. Second operand 8 states and 157 transitions. [2024-06-27 23:47:01,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 171 transitions, 2147 flow [2024-06-27 23:47:01,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 171 transitions, 1990 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 23:47:01,956 INFO L231 Difference]: Finished difference. Result has 101 places, 141 transitions, 1729 flow [2024-06-27 23:47:01,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1247, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1729, PETRI_PLACES=101, PETRI_TRANSITIONS=141} [2024-06-27 23:47:01,957 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-27 23:47:01,957 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 141 transitions, 1729 flow [2024-06-27 23:47:01,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:01,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:01,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:01,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 23:47:01,958 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)] === [2024-06-27 23:47:01,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:01,958 INFO L85 PathProgramCache]: Analyzing trace with hash 67604691, now seen corresponding path program 2 times [2024-06-27 23:47:01,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:01,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935882740] [2024-06-27 23:47:01,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:01,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:01,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:03,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:47:03,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:03,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935882740] [2024-06-27 23:47:03,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935882740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:03,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:03,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:47:03,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593612234] [2024-06-27 23:47:03,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:03,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:47:03,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:03,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:47:03,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:47:03,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:47:03,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 141 transitions, 1729 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) [2024-06-27 23:47:03,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:03,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:47:03,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:04,372 INFO L124 PetriNetUnfolderBase]: 2392/3675 cut-off events. [2024-06-27 23:47:04,372 INFO L125 PetriNetUnfolderBase]: For 38725/38725 co-relation queries the response was YES. [2024-06-27 23:47:04,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19229 conditions, 3675 events. 2392/3675 cut-off events. For 38725/38725 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 18093 event pairs, 1090 based on Foata normal form. 2/3676 useless extension candidates. Maximal degree in co-relation 19182. Up to 3477 conditions per place. [2024-06-27 23:47:04,392 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 141 selfloop transitions, 26 changer transitions 0/171 dead transitions. [2024-06-27 23:47:04,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 171 transitions, 2285 flow [2024-06-27 23:47:04,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:47:04,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:47:04,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-27 23:47:04,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-27 23:47:04,393 INFO L175 Difference]: Start difference. First operand has 101 places, 141 transitions, 1729 flow. Second operand 7 states and 129 transitions. [2024-06-27 23:47:04,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 171 transitions, 2285 flow [2024-06-27 23:47:04,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 171 transitions, 2175 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-27 23:47:04,429 INFO L231 Difference]: Finished difference. Result has 104 places, 148 transitions, 1821 flow [2024-06-27 23:47:04,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1625, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1821, PETRI_PLACES=104, PETRI_TRANSITIONS=148} [2024-06-27 23:47:04,429 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-27 23:47:04,429 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 148 transitions, 1821 flow [2024-06-27 23:47:04,430 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) [2024-06-27 23:47:04,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:04,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:04,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 23:47:04,430 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:47:04,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:04,430 INFO L85 PathProgramCache]: Analyzing trace with hash -204472986, now seen corresponding path program 1 times [2024-06-27 23:47:04,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:04,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074016962] [2024-06-27 23:47:04,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:04,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:04,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:05,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:47:05,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:05,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074016962] [2024-06-27 23:47:05,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074016962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:05,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:05,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:47:05,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554000634] [2024-06-27 23:47:05,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:05,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:47:05,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:05,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:47:05,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:47:05,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:47:05,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 148 transitions, 1821 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) [2024-06-27 23:47:05,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:05,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:47:05,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:06,769 INFO L124 PetriNetUnfolderBase]: 2641/3943 cut-off events. [2024-06-27 23:47:06,769 INFO L125 PetriNetUnfolderBase]: For 46723/46723 co-relation queries the response was YES. [2024-06-27 23:47:06,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20938 conditions, 3943 events. 2641/3943 cut-off events. For 46723/46723 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 18804 event pairs, 1204 based on Foata normal form. 1/3943 useless extension candidates. Maximal degree in co-relation 20890. Up to 3901 conditions per place. [2024-06-27 23:47:06,792 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 143 selfloop transitions, 13 changer transitions 0/159 dead transitions. [2024-06-27 23:47:06,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 159 transitions, 2187 flow [2024-06-27 23:47:06,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:47:06,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:47:06,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-27 23:47:06,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38492063492063494 [2024-06-27 23:47:06,794 INFO L175 Difference]: Start difference. First operand has 104 places, 148 transitions, 1821 flow. Second operand 6 states and 97 transitions. [2024-06-27 23:47:06,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 159 transitions, 2187 flow [2024-06-27 23:47:06,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 159 transitions, 2029 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 23:47:06,838 INFO L231 Difference]: Finished difference. Result has 103 places, 151 transitions, 1731 flow [2024-06-27 23:47:06,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1663, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1731, PETRI_PLACES=103, PETRI_TRANSITIONS=151} [2024-06-27 23:47:06,839 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 60 predicate places. [2024-06-27 23:47:06,839 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 151 transitions, 1731 flow [2024-06-27 23:47:06,839 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) [2024-06-27 23:47:06,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:06,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:06,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 23:47:06,839 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)] === [2024-06-27 23:47:06,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:06,839 INFO L85 PathProgramCache]: Analyzing trace with hash 393253421, now seen corresponding path program 1 times [2024-06-27 23:47:06,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:06,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591534007] [2024-06-27 23:47:06,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:06,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:08,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:47:08,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:08,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591534007] [2024-06-27 23:47:08,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591534007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:08,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:08,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:47:08,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797393225] [2024-06-27 23:47:08,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:08,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:47:08,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:08,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:47:08,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:47:09,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:47:09,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 151 transitions, 1731 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:09,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:09,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:47:09,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:10,024 INFO L124 PetriNetUnfolderBase]: 2506/3925 cut-off events. [2024-06-27 23:47:10,024 INFO L125 PetriNetUnfolderBase]: For 53749/53797 co-relation queries the response was YES. [2024-06-27 23:47:10,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21190 conditions, 3925 events. 2506/3925 cut-off events. For 53749/53797 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 20965 event pairs, 498 based on Foata normal form. 40/3951 useless extension candidates. Maximal degree in co-relation 21140. Up to 2734 conditions per place. [2024-06-27 23:47:10,052 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 110 selfloop transitions, 78 changer transitions 0/196 dead transitions. [2024-06-27 23:47:10,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 196 transitions, 2385 flow [2024-06-27 23:47:10,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:47:10,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:47:10,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-27 23:47:10,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49702380952380953 [2024-06-27 23:47:10,054 INFO L175 Difference]: Start difference. First operand has 103 places, 151 transitions, 1731 flow. Second operand 8 states and 167 transitions. [2024-06-27 23:47:10,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 196 transitions, 2385 flow [2024-06-27 23:47:10,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 196 transitions, 2351 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 23:47:10,103 INFO L231 Difference]: Finished difference. Result has 109 places, 157 transitions, 1966 flow [2024-06-27 23:47:10,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1697, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1966, PETRI_PLACES=109, PETRI_TRANSITIONS=157} [2024-06-27 23:47:10,104 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-27 23:47:10,104 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 157 transitions, 1966 flow [2024-06-27 23:47:10,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:10,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:10,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:10,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 23:47:10,104 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)] === [2024-06-27 23:47:10,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:10,105 INFO L85 PathProgramCache]: Analyzing trace with hash 452300051, now seen corresponding path program 2 times [2024-06-27 23:47:10,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:10,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297137977] [2024-06-27 23:47:10,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:10,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:10,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:12,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:47:12,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:12,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297137977] [2024-06-27 23:47:12,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297137977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:12,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:12,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:47:12,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291487559] [2024-06-27 23:47:12,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:12,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:47:12,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:12,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:47:12,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:47:12,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:47:12,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 157 transitions, 1966 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) [2024-06-27 23:47:12,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:12,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:47:12,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:12,995 INFO L124 PetriNetUnfolderBase]: 2578/4054 cut-off events. [2024-06-27 23:47:12,996 INFO L125 PetriNetUnfolderBase]: For 62733/62787 co-relation queries the response was YES. [2024-06-27 23:47:13,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22723 conditions, 4054 events. 2578/4054 cut-off events. For 62733/62787 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 22027 event pairs, 715 based on Foata normal form. 52/4092 useless extension candidates. Maximal degree in co-relation 22669. Up to 3170 conditions per place. [2024-06-27 23:47:13,026 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 100 selfloop transitions, 86 changer transitions 0/194 dead transitions. [2024-06-27 23:47:13,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 194 transitions, 2565 flow [2024-06-27 23:47:13,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:47:13,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:47:13,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-27 23:47:13,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-06-27 23:47:13,028 INFO L175 Difference]: Start difference. First operand has 109 places, 157 transitions, 1966 flow. Second operand 8 states and 174 transitions. [2024-06-27 23:47:13,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 194 transitions, 2565 flow [2024-06-27 23:47:13,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 194 transitions, 2487 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 23:47:13,086 INFO L231 Difference]: Finished difference. Result has 114 places, 158 transitions, 2088 flow [2024-06-27 23:47:13,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1888, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2088, PETRI_PLACES=114, PETRI_TRANSITIONS=158} [2024-06-27 23:47:13,086 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2024-06-27 23:47:13,086 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 158 transitions, 2088 flow [2024-06-27 23:47:13,086 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) [2024-06-27 23:47:13,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:13,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:13,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 23:47:13,087 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)] === [2024-06-27 23:47:13,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:13,087 INFO L85 PathProgramCache]: Analyzing trace with hash 481908461, now seen corresponding path program 3 times [2024-06-27 23:47:13,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:13,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152293841] [2024-06-27 23:47:13,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:13,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:13,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:15,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:47:15,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:15,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152293841] [2024-06-27 23:47:15,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152293841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:15,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:15,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:47:15,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428270646] [2024-06-27 23:47:15,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:15,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:47:15,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:15,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:47:15,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:47:15,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:47:15,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 158 transitions, 2088 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) [2024-06-27 23:47:15,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:15,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:47:15,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:16,250 INFO L124 PetriNetUnfolderBase]: 2537/3994 cut-off events. [2024-06-27 23:47:16,250 INFO L125 PetriNetUnfolderBase]: For 65495/65532 co-relation queries the response was YES. [2024-06-27 23:47:16,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22772 conditions, 3994 events. 2537/3994 cut-off events. For 65495/65532 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 21541 event pairs, 701 based on Foata normal form. 50/4039 useless extension candidates. Maximal degree in co-relation 22716. Up to 3213 conditions per place. [2024-06-27 23:47:16,280 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 97 selfloop transitions, 89 changer transitions 0/194 dead transitions. [2024-06-27 23:47:16,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 194 transitions, 2682 flow [2024-06-27 23:47:16,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:47:16,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:47:16,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-27 23:47:16,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2024-06-27 23:47:16,282 INFO L175 Difference]: Start difference. First operand has 114 places, 158 transitions, 2088 flow. Second operand 8 states and 171 transitions. [2024-06-27 23:47:16,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 194 transitions, 2682 flow [2024-06-27 23:47:16,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 194 transitions, 2499 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 23:47:16,360 INFO L231 Difference]: Finished difference. Result has 116 places, 158 transitions, 2090 flow [2024-06-27 23:47:16,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1905, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2090, PETRI_PLACES=116, PETRI_TRANSITIONS=158} [2024-06-27 23:47:16,360 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-27 23:47:16,360 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 158 transitions, 2090 flow [2024-06-27 23:47:16,361 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) [2024-06-27 23:47:16,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:16,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:16,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 23:47:16,361 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)] === [2024-06-27 23:47:16,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:16,362 INFO L85 PathProgramCache]: Analyzing trace with hash 794282685, now seen corresponding path program 1 times [2024-06-27 23:47:16,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:16,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606697670] [2024-06-27 23:47:16,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:16,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:16,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:18,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:47:18,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:18,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606697670] [2024-06-27 23:47:18,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606697670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:18,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:18,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:47:18,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540964927] [2024-06-27 23:47:18,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:18,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:47:18,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:18,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:47:18,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:47:18,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:47:18,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 158 transitions, 2090 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) [2024-06-27 23:47:18,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:18,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:47:18,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:19,691 INFO L124 PetriNetUnfolderBase]: 2748/4238 cut-off events. [2024-06-27 23:47:19,691 INFO L125 PetriNetUnfolderBase]: For 68981/69001 co-relation queries the response was YES. [2024-06-27 23:47:19,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24224 conditions, 4238 events. 2748/4238 cut-off events. For 68981/69001 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 21937 event pairs, 736 based on Foata normal form. 24/4261 useless extension candidates. Maximal degree in co-relation 24167. Up to 3601 conditions per place. [2024-06-27 23:47:19,720 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 110 selfloop transitions, 82 changer transitions 0/197 dead transitions. [2024-06-27 23:47:19,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 197 transitions, 2680 flow [2024-06-27 23:47:19,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:47:19,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:47:19,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-27 23:47:19,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-27 23:47:19,722 INFO L175 Difference]: Start difference. First operand has 116 places, 158 transitions, 2090 flow. Second operand 9 states and 174 transitions. [2024-06-27 23:47:19,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 197 transitions, 2680 flow [2024-06-27 23:47:19,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 197 transitions, 2499 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 23:47:19,800 INFO L231 Difference]: Finished difference. Result has 119 places, 161 transitions, 2120 flow [2024-06-27 23:47:19,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1911, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2120, PETRI_PLACES=119, PETRI_TRANSITIONS=161} [2024-06-27 23:47:19,800 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-27 23:47:19,800 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 161 transitions, 2120 flow [2024-06-27 23:47:19,801 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) [2024-06-27 23:47:19,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:19,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:19,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 23:47:19,801 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:47:19,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:19,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1764410775, now seen corresponding path program 1 times [2024-06-27 23:47:19,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:19,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691155662] [2024-06-27 23:47:19,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:19,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:19,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:21,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:47:21,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:21,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691155662] [2024-06-27 23:47:21,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691155662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:21,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:21,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:47:21,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700177870] [2024-06-27 23:47:21,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:21,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:47:21,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:21,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:47:21,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:47:21,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:47:21,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 161 transitions, 2120 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) [2024-06-27 23:47:21,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:21,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:47:21,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:22,378 INFO L124 PetriNetUnfolderBase]: 2797/4292 cut-off events. [2024-06-27 23:47:22,379 INFO L125 PetriNetUnfolderBase]: For 73082/73082 co-relation queries the response was YES. [2024-06-27 23:47:22,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24927 conditions, 4292 events. 2797/4292 cut-off events. For 73082/73082 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 22124 event pairs, 1146 based on Foata normal form. 1/4288 useless extension candidates. Maximal degree in co-relation 24869. Up to 4119 conditions per place. [2024-06-27 23:47:22,406 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 160 selfloop transitions, 23 changer transitions 0/188 dead transitions. [2024-06-27 23:47:22,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 188 transitions, 2674 flow [2024-06-27 23:47:22,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:47:22,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:47:22,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 23:47:22,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-27 23:47:22,408 INFO L175 Difference]: Start difference. First operand has 119 places, 161 transitions, 2120 flow. Second operand 7 states and 127 transitions. [2024-06-27 23:47:22,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 188 transitions, 2674 flow [2024-06-27 23:47:22,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 188 transitions, 2487 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 23:47:22,489 INFO L231 Difference]: Finished difference. Result has 120 places, 170 transitions, 2094 flow [2024-06-27 23:47:22,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1937, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2094, PETRI_PLACES=120, PETRI_TRANSITIONS=170} [2024-06-27 23:47:22,489 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-27 23:47:22,489 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 170 transitions, 2094 flow [2024-06-27 23:47:22,489 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) [2024-06-27 23:47:22,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:22,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:22,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 23:47:22,490 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)] === [2024-06-27 23:47:22,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:22,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1376086651, now seen corresponding path program 2 times [2024-06-27 23:47:22,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:22,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404993593] [2024-06-27 23:47:22,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:22,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:22,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:24,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:47:24,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:24,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404993593] [2024-06-27 23:47:24,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404993593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:24,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:24,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:47:24,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068239504] [2024-06-27 23:47:24,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:24,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:47:24,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:24,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:47:24,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:47:24,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:47:24,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 170 transitions, 2094 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) [2024-06-27 23:47:24,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:24,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:47:24,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:25,334 INFO L124 PetriNetUnfolderBase]: 2853/4380 cut-off events. [2024-06-27 23:47:25,334 INFO L125 PetriNetUnfolderBase]: For 80214/80214 co-relation queries the response was YES. [2024-06-27 23:47:25,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25522 conditions, 4380 events. 2853/4380 cut-off events. For 80214/80214 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 22747 event pairs, 1241 based on Foata normal form. 8/4383 useless extension candidates. Maximal degree in co-relation 25462. Up to 3839 conditions per place. [2024-06-27 23:47:25,361 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 137 selfloop transitions, 73 changer transitions 0/215 dead transitions. [2024-06-27 23:47:25,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 215 transitions, 2816 flow [2024-06-27 23:47:25,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:47:25,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:47:25,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 23:47:25,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-27 23:47:25,363 INFO L175 Difference]: Start difference. First operand has 120 places, 170 transitions, 2094 flow. Second operand 9 states and 161 transitions. [2024-06-27 23:47:25,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 215 transitions, 2816 flow [2024-06-27 23:47:25,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 215 transitions, 2783 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-27 23:47:25,435 INFO L231 Difference]: Finished difference. Result has 128 places, 183 transitions, 2396 flow [2024-06-27 23:47:25,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2061, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2396, PETRI_PLACES=128, PETRI_TRANSITIONS=183} [2024-06-27 23:47:25,435 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2024-06-27 23:47:25,435 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 183 transitions, 2396 flow [2024-06-27 23:47:25,435 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) [2024-06-27 23:47:25,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:25,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:25,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 23:47:25,436 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:47:25,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:25,436 INFO L85 PathProgramCache]: Analyzing trace with hash -666881163, now seen corresponding path program 2 times [2024-06-27 23:47:25,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:25,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988976938] [2024-06-27 23:47:25,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:25,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:25,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:26,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:47:26,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:26,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988976938] [2024-06-27 23:47:26,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988976938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:26,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:26,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:47:26,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172953981] [2024-06-27 23:47:26,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:26,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:47:26,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:26,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:47:26,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:47:26,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:47:26,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 183 transitions, 2396 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) [2024-06-27 23:47:26,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:26,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:47:26,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:27,620 INFO L124 PetriNetUnfolderBase]: 2999/4537 cut-off events. [2024-06-27 23:47:27,620 INFO L125 PetriNetUnfolderBase]: For 87454/87454 co-relation queries the response was YES. [2024-06-27 23:47:27,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27431 conditions, 4537 events. 2999/4537 cut-off events. For 87454/87454 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 23024 event pairs, 1342 based on Foata normal form. 1/4537 useless extension candidates. Maximal degree in co-relation 27368. Up to 4470 conditions per place. [2024-06-27 23:47:27,653 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 176 selfloop transitions, 24 changer transitions 0/203 dead transitions. [2024-06-27 23:47:27,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 203 transitions, 2955 flow [2024-06-27 23:47:27,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:47:27,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:47:27,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-27 23:47:27,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-27 23:47:27,654 INFO L175 Difference]: Start difference. First operand has 128 places, 183 transitions, 2396 flow. Second operand 6 states and 104 transitions. [2024-06-27 23:47:27,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 203 transitions, 2955 flow [2024-06-27 23:47:27,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 203 transitions, 2789 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 23:47:27,743 INFO L231 Difference]: Finished difference. Result has 129 places, 191 transitions, 2386 flow [2024-06-27 23:47:27,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2230, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2386, PETRI_PLACES=129, PETRI_TRANSITIONS=191} [2024-06-27 23:47:27,744 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-27 23:47:27,744 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 191 transitions, 2386 flow [2024-06-27 23:47:27,744 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) [2024-06-27 23:47:27,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:27,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:27,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 23:47:27,745 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)] === [2024-06-27 23:47:27,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:27,745 INFO L85 PathProgramCache]: Analyzing trace with hash -595744315, now seen corresponding path program 3 times [2024-06-27 23:47:27,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:27,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002926479] [2024-06-27 23:47:27,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:27,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:27,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:29,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:47:29,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:29,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002926479] [2024-06-27 23:47:29,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002926479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:29,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:29,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:47:29,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088991123] [2024-06-27 23:47:29,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:29,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:47:29,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:29,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:47:29,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:47:29,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:47:29,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 191 transitions, 2386 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) [2024-06-27 23:47:29,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:29,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:47:29,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:30,719 INFO L124 PetriNetUnfolderBase]: 2894/4438 cut-off events. [2024-06-27 23:47:30,719 INFO L125 PetriNetUnfolderBase]: For 92592/92592 co-relation queries the response was YES. [2024-06-27 23:47:30,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27066 conditions, 4438 events. 2894/4438 cut-off events. For 92592/92592 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 23068 event pairs, 1276 based on Foata normal form. 4/4437 useless extension candidates. Maximal degree in co-relation 27002. Up to 4178 conditions per place. [2024-06-27 23:47:30,752 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 190 selfloop transitions, 36 changer transitions 0/231 dead transitions. [2024-06-27 23:47:30,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 231 transitions, 3139 flow [2024-06-27 23:47:30,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:47:30,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:47:30,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 23:47:30,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-27 23:47:30,754 INFO L175 Difference]: Start difference. First operand has 129 places, 191 transitions, 2386 flow. Second operand 8 states and 145 transitions. [2024-06-27 23:47:30,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 231 transitions, 3139 flow [2024-06-27 23:47:30,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 231 transitions, 3088 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 23:47:30,875 INFO L231 Difference]: Finished difference. Result has 135 places, 201 transitions, 2596 flow [2024-06-27 23:47:30,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2335, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2596, PETRI_PLACES=135, PETRI_TRANSITIONS=201} [2024-06-27 23:47:30,876 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2024-06-27 23:47:30,876 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 201 transitions, 2596 flow [2024-06-27 23:47:30,876 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) [2024-06-27 23:47:30,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:30,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:30,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 23:47:30,877 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)] === [2024-06-27 23:47:30,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:30,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1005558131, now seen corresponding path program 4 times [2024-06-27 23:47:30,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:30,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100627978] [2024-06-27 23:47:30,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:30,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:32,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:47:32,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:32,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100627978] [2024-06-27 23:47:32,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100627978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:32,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:32,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:47:32,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704011049] [2024-06-27 23:47:32,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:32,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:47:32,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:32,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:47:32,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:47:32,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:47:32,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 201 transitions, 2596 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) [2024-06-27 23:47:32,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:32,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:47:32,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:33,394 INFO L124 PetriNetUnfolderBase]: 2911/4466 cut-off events. [2024-06-27 23:47:33,394 INFO L125 PetriNetUnfolderBase]: For 101899/101899 co-relation queries the response was YES. [2024-06-27 23:47:33,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28010 conditions, 4466 events. 2911/4466 cut-off events. For 101899/101899 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 23201 event pairs, 1261 based on Foata normal form. 4/4465 useless extension candidates. Maximal degree in co-relation 27944. Up to 4258 conditions per place. [2024-06-27 23:47:33,436 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 202 selfloop transitions, 22 changer transitions 0/229 dead transitions. [2024-06-27 23:47:33,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 229 transitions, 3213 flow [2024-06-27 23:47:33,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:47:33,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:47:33,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-27 23:47:33,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-27 23:47:33,438 INFO L175 Difference]: Start difference. First operand has 135 places, 201 transitions, 2596 flow. Second operand 9 states and 151 transitions. [2024-06-27 23:47:33,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 229 transitions, 3213 flow [2024-06-27 23:47:33,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 229 transitions, 3098 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 23:47:33,562 INFO L231 Difference]: Finished difference. Result has 139 places, 206 transitions, 2632 flow [2024-06-27 23:47:33,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2487, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2632, PETRI_PLACES=139, PETRI_TRANSITIONS=206} [2024-06-27 23:47:33,563 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-27 23:47:33,563 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 206 transitions, 2632 flow [2024-06-27 23:47:33,563 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) [2024-06-27 23:47:33,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:33,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:33,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 23:47:33,563 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)] === [2024-06-27 23:47:33,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:33,563 INFO L85 PathProgramCache]: Analyzing trace with hash -359568955, now seen corresponding path program 5 times [2024-06-27 23:47:33,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:33,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139529019] [2024-06-27 23:47:33,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:33,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:33,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:35,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:47:35,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:35,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139529019] [2024-06-27 23:47:35,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139529019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:35,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:35,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:47:35,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573787720] [2024-06-27 23:47:35,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:35,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:47:35,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:35,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:47:35,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:47:35,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:47:35,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 206 transitions, 2632 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) [2024-06-27 23:47:35,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:35,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:47:35,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:36,247 INFO L124 PetriNetUnfolderBase]: 2914/4471 cut-off events. [2024-06-27 23:47:36,247 INFO L125 PetriNetUnfolderBase]: For 108387/108387 co-relation queries the response was YES. [2024-06-27 23:47:36,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28367 conditions, 4471 events. 2914/4471 cut-off events. For 108387/108387 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 23247 event pairs, 1277 based on Foata normal form. 4/4470 useless extension candidates. Maximal degree in co-relation 28300. Up to 4219 conditions per place. [2024-06-27 23:47:36,280 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 199 selfloop transitions, 37 changer transitions 0/241 dead transitions. [2024-06-27 23:47:36,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 241 transitions, 3287 flow [2024-06-27 23:47:36,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:47:36,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:47:36,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 23:47:36,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-27 23:47:36,282 INFO L175 Difference]: Start difference. First operand has 139 places, 206 transitions, 2632 flow. Second operand 9 states and 160 transitions. [2024-06-27 23:47:36,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 241 transitions, 3287 flow [2024-06-27 23:47:36,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 241 transitions, 3220 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 23:47:36,406 INFO L231 Difference]: Finished difference. Result has 143 places, 210 transitions, 2709 flow [2024-06-27 23:47:36,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2565, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2709, PETRI_PLACES=143, PETRI_TRANSITIONS=210} [2024-06-27 23:47:36,406 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-27 23:47:36,406 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 210 transitions, 2709 flow [2024-06-27 23:47:36,407 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) [2024-06-27 23:47:36,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:36,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:36,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 23:47:36,407 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)] === [2024-06-27 23:47:36,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:36,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1689408631, now seen corresponding path program 1 times [2024-06-27 23:47:36,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:36,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445621817] [2024-06-27 23:47:36,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:36,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:36,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:38,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:47:38,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:38,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445621817] [2024-06-27 23:47:38,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445621817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:38,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:38,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:47:38,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600186801] [2024-06-27 23:47:38,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:38,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:47:38,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:38,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:47:38,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:47:38,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:47:38,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 210 transitions, 2709 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) [2024-06-27 23:47:38,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:38,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:47:38,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:39,027 INFO L124 PetriNetUnfolderBase]: 2894/4440 cut-off events. [2024-06-27 23:47:39,027 INFO L125 PetriNetUnfolderBase]: For 115257/115257 co-relation queries the response was YES. [2024-06-27 23:47:39,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28565 conditions, 4440 events. 2894/4440 cut-off events. For 115257/115257 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 23049 event pairs, 1261 based on Foata normal form. 2/4437 useless extension candidates. Maximal degree in co-relation 28497. Up to 3914 conditions per place. [2024-06-27 23:47:39,065 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 147 selfloop transitions, 85 changer transitions 0/237 dead transitions. [2024-06-27 23:47:39,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 237 transitions, 3303 flow [2024-06-27 23:47:39,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:47:39,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:47:39,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 23:47:39,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-27 23:47:39,067 INFO L175 Difference]: Start difference. First operand has 143 places, 210 transitions, 2709 flow. Second operand 7 states and 136 transitions. [2024-06-27 23:47:39,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 237 transitions, 3303 flow [2024-06-27 23:47:39,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 237 transitions, 3206 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 23:47:39,229 INFO L231 Difference]: Finished difference. Result has 145 places, 210 transitions, 2813 flow [2024-06-27 23:47:39,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2612, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2813, PETRI_PLACES=145, PETRI_TRANSITIONS=210} [2024-06-27 23:47:39,230 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-27 23:47:39,230 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 210 transitions, 2813 flow [2024-06-27 23:47:39,230 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) [2024-06-27 23:47:39,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:39,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:39,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 23:47:39,231 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:47:39,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:39,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1752557903, now seen corresponding path program 3 times [2024-06-27 23:47:39,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:39,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932681171] [2024-06-27 23:47:39,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:39,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:39,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:40,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:47:40,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:40,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932681171] [2024-06-27 23:47:40,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932681171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:40,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:40,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:47:40,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627541765] [2024-06-27 23:47:40,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:40,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:47:40,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:40,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:47:40,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:47:40,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:47:40,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 210 transitions, 2813 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) [2024-06-27 23:47:40,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:40,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:47:40,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:41,301 INFO L124 PetriNetUnfolderBase]: 3027/4570 cut-off events. [2024-06-27 23:47:41,301 INFO L125 PetriNetUnfolderBase]: For 122837/122837 co-relation queries the response was YES. [2024-06-27 23:47:41,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29658 conditions, 4570 events. 3027/4570 cut-off events. For 122837/122837 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 23081 event pairs, 1351 based on Foata normal form. 1/4570 useless extension candidates. Maximal degree in co-relation 29588. Up to 4525 conditions per place. [2024-06-27 23:47:41,331 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 202 selfloop transitions, 13 changer transitions 0/218 dead transitions. [2024-06-27 23:47:41,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 218 transitions, 3269 flow [2024-06-27 23:47:41,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:47:41,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:47:41,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-27 23:47:41,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38492063492063494 [2024-06-27 23:47:41,332 INFO L175 Difference]: Start difference. First operand has 145 places, 210 transitions, 2813 flow. Second operand 6 states and 97 transitions. [2024-06-27 23:47:41,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 218 transitions, 3269 flow [2024-06-27 23:47:41,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 218 transitions, 3132 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 23:47:41,480 INFO L231 Difference]: Finished difference. Result has 146 places, 210 transitions, 2708 flow [2024-06-27 23:47:41,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2676, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2708, PETRI_PLACES=146, PETRI_TRANSITIONS=210} [2024-06-27 23:47:41,480 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-27 23:47:41,480 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 210 transitions, 2708 flow [2024-06-27 23:47:41,480 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) [2024-06-27 23:47:41,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:41,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:41,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 23:47:41,481 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:47:41,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:41,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1746849935, now seen corresponding path program 1 times [2024-06-27 23:47:41,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:41,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392207617] [2024-06-27 23:47:41,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:41,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:41,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:43,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:47:43,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:43,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392207617] [2024-06-27 23:47:43,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392207617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:43,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:43,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:47:43,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511046547] [2024-06-27 23:47:43,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:43,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:47:43,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:43,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:47:43,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:47:43,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:47:43,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 210 transitions, 2708 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) [2024-06-27 23:47:43,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:43,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:47:43,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:44,023 INFO L124 PetriNetUnfolderBase]: 2896/4434 cut-off events. [2024-06-27 23:47:44,023 INFO L125 PetriNetUnfolderBase]: For 129405/129405 co-relation queries the response was YES. [2024-06-27 23:47:44,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28934 conditions, 4434 events. 2896/4434 cut-off events. For 129405/129405 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 22924 event pairs, 1275 based on Foata normal form. 1/4430 useless extension candidates. Maximal degree in co-relation 28863. Up to 4276 conditions per place. [2024-06-27 23:47:44,062 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 201 selfloop transitions, 21 changer transitions 0/227 dead transitions. [2024-06-27 23:47:44,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 227 transitions, 3306 flow [2024-06-27 23:47:44,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:47:44,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:47:44,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-27 23:47:44,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 23:47:44,063 INFO L175 Difference]: Start difference. First operand has 146 places, 210 transitions, 2708 flow. Second operand 6 states and 108 transitions. [2024-06-27 23:47:44,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 227 transitions, 3306 flow [2024-06-27 23:47:44,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 227 transitions, 3278 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 23:47:44,220 INFO L231 Difference]: Finished difference. Result has 148 places, 216 transitions, 2801 flow [2024-06-27 23:47:44,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2680, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2801, PETRI_PLACES=148, PETRI_TRANSITIONS=216} [2024-06-27 23:47:44,221 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 105 predicate places. [2024-06-27 23:47:44,221 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 216 transitions, 2801 flow [2024-06-27 23:47:44,221 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) [2024-06-27 23:47:44,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:44,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:44,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 23:47:44,222 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:47:44,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:44,222 INFO L85 PathProgramCache]: Analyzing trace with hash -2026721231, now seen corresponding path program 2 times [2024-06-27 23:47:44,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:44,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076378386] [2024-06-27 23:47:44,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:44,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:44,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:45,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:47:45,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:45,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076378386] [2024-06-27 23:47:45,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076378386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:45,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:45,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:47:45,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734344929] [2024-06-27 23:47:45,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:45,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:47:45,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:45,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:47:45,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:47:45,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:47:45,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 216 transitions, 2801 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) [2024-06-27 23:47:45,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:45,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:47:45,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:46,739 INFO L124 PetriNetUnfolderBase]: 2893/4430 cut-off events. [2024-06-27 23:47:46,739 INFO L125 PetriNetUnfolderBase]: For 138354/138358 co-relation queries the response was YES. [2024-06-27 23:47:46,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29564 conditions, 4430 events. 2893/4430 cut-off events. For 138354/138358 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 22854 event pairs, 1269 based on Foata normal form. 5/4430 useless extension candidates. Maximal degree in co-relation 29491. Up to 4273 conditions per place. [2024-06-27 23:47:46,769 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 198 selfloop transitions, 21 changer transitions 0/224 dead transitions. [2024-06-27 23:47:46,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 224 transitions, 3265 flow [2024-06-27 23:47:46,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:47:46,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:47:46,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-27 23:47:46,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-27 23:47:46,770 INFO L175 Difference]: Start difference. First operand has 148 places, 216 transitions, 2801 flow. Second operand 6 states and 104 transitions. [2024-06-27 23:47:46,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 224 transitions, 3265 flow [2024-06-27 23:47:46,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 224 transitions, 3220 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-27 23:47:46,945 INFO L231 Difference]: Finished difference. Result has 152 places, 216 transitions, 2806 flow [2024-06-27 23:47:46,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2756, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2806, PETRI_PLACES=152, PETRI_TRANSITIONS=216} [2024-06-27 23:47:46,946 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 109 predicate places. [2024-06-27 23:47:46,946 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 216 transitions, 2806 flow [2024-06-27 23:47:46,946 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) [2024-06-27 23:47:46,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:46,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:46,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 23:47:46,946 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:47:46,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:46,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1752571791, now seen corresponding path program 1 times [2024-06-27 23:47:46,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:46,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948025994] [2024-06-27 23:47:46,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:46,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:48,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:47:48,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:48,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948025994] [2024-06-27 23:47:48,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948025994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:48,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:48,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:47:48,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137421642] [2024-06-27 23:47:48,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:48,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:47:48,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:48,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:47:48,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:47:48,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:47:48,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 216 transitions, 2806 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) [2024-06-27 23:47:48,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:48,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:47:48,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:49,870 INFO L124 PetriNetUnfolderBase]: 3020/4561 cut-off events. [2024-06-27 23:47:49,870 INFO L125 PetriNetUnfolderBase]: For 144544/144544 co-relation queries the response was YES. [2024-06-27 23:47:49,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30188 conditions, 4561 events. 3020/4561 cut-off events. For 144544/144544 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 22929 event pairs, 1347 based on Foata normal form. 3/4563 useless extension candidates. Maximal degree in co-relation 30111. Up to 4507 conditions per place. [2024-06-27 23:47:49,908 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 211 selfloop transitions, 16 changer transitions 0/230 dead transitions. [2024-06-27 23:47:49,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 230 transitions, 3328 flow [2024-06-27 23:47:49,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:47:49,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:47:49,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-27 23:47:49,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-27 23:47:49,909 INFO L175 Difference]: Start difference. First operand has 152 places, 216 transitions, 2806 flow. Second operand 7 states and 111 transitions. [2024-06-27 23:47:49,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 230 transitions, 3328 flow [2024-06-27 23:47:50,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 230 transitions, 3282 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 23:47:50,094 INFO L231 Difference]: Finished difference. Result has 155 places, 219 transitions, 2842 flow [2024-06-27 23:47:50,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2760, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2842, PETRI_PLACES=155, PETRI_TRANSITIONS=219} [2024-06-27 23:47:50,095 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-27 23:47:50,095 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 219 transitions, 2842 flow [2024-06-27 23:47:50,095 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) [2024-06-27 23:47:50,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:50,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:50,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 23:47:50,096 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:47:50,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:50,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1418027047, now seen corresponding path program 1 times [2024-06-27 23:47:50,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:50,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345518828] [2024-06-27 23:47:50,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:50,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:51,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:47:51,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:51,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345518828] [2024-06-27 23:47:51,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345518828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:51,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:51,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:47:51,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336682693] [2024-06-27 23:47:51,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:51,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:47:51,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:51,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:47:51,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:47:51,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:47:51,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 219 transitions, 2842 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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) [2024-06-27 23:47:51,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:51,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:47:51,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:52,620 INFO L124 PetriNetUnfolderBase]: 2939/4494 cut-off events. [2024-06-27 23:47:52,620 INFO L125 PetriNetUnfolderBase]: For 151639/151653 co-relation queries the response was YES. [2024-06-27 23:47:52,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30653 conditions, 4494 events. 2939/4494 cut-off events. For 151639/151653 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 23131 event pairs, 968 based on Foata normal form. 14/4503 useless extension candidates. Maximal degree in co-relation 30574. Up to 4067 conditions per place. [2024-06-27 23:47:52,658 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 199 selfloop transitions, 70 changer transitions 0/274 dead transitions. [2024-06-27 23:47:52,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 274 transitions, 4028 flow [2024-06-27 23:47:52,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:47:52,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:47:52,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 23:47:52,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 23:47:52,659 INFO L175 Difference]: Start difference. First operand has 155 places, 219 transitions, 2842 flow. Second operand 8 states and 154 transitions. [2024-06-27 23:47:52,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 274 transitions, 4028 flow [2024-06-27 23:47:52,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 274 transitions, 3978 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 23:47:52,894 INFO L231 Difference]: Finished difference. Result has 161 places, 244 transitions, 3402 flow [2024-06-27 23:47:52,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2792, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3402, PETRI_PLACES=161, PETRI_TRANSITIONS=244} [2024-06-27 23:47:52,895 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-27 23:47:52,895 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 244 transitions, 3402 flow [2024-06-27 23:47:52,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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) [2024-06-27 23:47:52,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:52,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:52,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 23:47:52,896 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)] === [2024-06-27 23:47:52,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:52,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1601493763, now seen corresponding path program 1 times [2024-06-27 23:47:52,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:52,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150746499] [2024-06-27 23:47:52,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:52,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:52,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:55,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:47:55,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:55,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150746499] [2024-06-27 23:47:55,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150746499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:55,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:55,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:47:55,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187099059] [2024-06-27 23:47:55,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:55,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:47:55,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:55,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:47:55,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:47:55,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:47:55,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 244 transitions, 3402 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:55,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:55,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:47:55,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:56,845 INFO L124 PetriNetUnfolderBase]: 3070/4703 cut-off events. [2024-06-27 23:47:56,845 INFO L125 PetriNetUnfolderBase]: For 168938/168949 co-relation queries the response was YES. [2024-06-27 23:47:56,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33514 conditions, 4703 events. 3070/4703 cut-off events. For 168938/168949 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 24498 event pairs, 982 based on Foata normal form. 12/4710 useless extension candidates. Maximal degree in co-relation 33431. Up to 3864 conditions per place. [2024-06-27 23:47:56,885 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 182 selfloop transitions, 124 changer transitions 0/311 dead transitions. [2024-06-27 23:47:56,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 311 transitions, 4779 flow [2024-06-27 23:47:56,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:47:56,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:47:56,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 23:47:56,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-27 23:47:56,886 INFO L175 Difference]: Start difference. First operand has 161 places, 244 transitions, 3402 flow. Second operand 9 states and 175 transitions. [2024-06-27 23:47:56,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 311 transitions, 4779 flow [2024-06-27 23:47:57,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 311 transitions, 4660 flow, removed 51 selfloop flow, removed 2 redundant places. [2024-06-27 23:47:57,111 INFO L231 Difference]: Finished difference. Result has 170 places, 270 transitions, 4026 flow [2024-06-27 23:47:57,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3303, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4026, PETRI_PLACES=170, PETRI_TRANSITIONS=270} [2024-06-27 23:47:57,111 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-27 23:47:57,111 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 270 transitions, 4026 flow [2024-06-27 23:47:57,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:57,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:57,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:57,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 23:47:57,112 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)] === [2024-06-27 23:47:57,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:57,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1426008915, now seen corresponding path program 2 times [2024-06-27 23:47:57,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:57,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779675508] [2024-06-27 23:47:57,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:57,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:57,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:59,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:47:59,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:59,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779675508] [2024-06-27 23:47:59,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779675508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:59,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:59,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:47:59,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332128001] [2024-06-27 23:47:59,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:59,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:47:59,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:59,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:47:59,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:47:59,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:47:59,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 270 transitions, 4026 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:59,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:59,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:47:59,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:00,987 INFO L124 PetriNetUnfolderBase]: 3123/4782 cut-off events. [2024-06-27 23:48:00,988 INFO L125 PetriNetUnfolderBase]: For 179315/179323 co-relation queries the response was YES. [2024-06-27 23:48:01,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34942 conditions, 4782 events. 3123/4782 cut-off events. For 179315/179323 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 24969 event pairs, 996 based on Foata normal form. 10/4787 useless extension candidates. Maximal degree in co-relation 34855. Up to 4056 conditions per place. [2024-06-27 23:48:01,022 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 189 selfloop transitions, 127 changer transitions 0/321 dead transitions. [2024-06-27 23:48:01,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 321 transitions, 5147 flow [2024-06-27 23:48:01,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:48:01,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:48:01,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 23:48:01,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-27 23:48:01,023 INFO L175 Difference]: Start difference. First operand has 170 places, 270 transitions, 4026 flow. Second operand 9 states and 173 transitions. [2024-06-27 23:48:01,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 321 transitions, 5147 flow [2024-06-27 23:48:01,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 321 transitions, 5018 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-27 23:48:01,247 INFO L231 Difference]: Finished difference. Result has 177 places, 284 transitions, 4474 flow [2024-06-27 23:48:01,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3919, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4474, PETRI_PLACES=177, PETRI_TRANSITIONS=284} [2024-06-27 23:48:01,247 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-27 23:48:01,247 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 284 transitions, 4474 flow [2024-06-27 23:48:01,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:48:01,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:01,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:48:01,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 23:48:01,248 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)] === [2024-06-27 23:48:01,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:01,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1420444725, now seen corresponding path program 3 times [2024-06-27 23:48:01,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:01,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680361534] [2024-06-27 23:48:01,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:01,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:01,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:03,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:48:03,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:03,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680361534] [2024-06-27 23:48:03,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680361534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:03,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:03,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:48:03,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977872200] [2024-06-27 23:48:03,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:03,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:48:03,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:03,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:48:03,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:48:03,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:48:03,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 284 transitions, 4474 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:48:03,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:03,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:48:03,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:04,672 INFO L124 PetriNetUnfolderBase]: 3166/4845 cut-off events. [2024-06-27 23:48:04,672 INFO L125 PetriNetUnfolderBase]: For 189978/189980 co-relation queries the response was YES. [2024-06-27 23:48:04,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36248 conditions, 4845 events. 3166/4845 cut-off events. For 189978/189980 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 25346 event pairs, 1024 based on Foata normal form. 6/4846 useless extension candidates. Maximal degree in co-relation 36158. Up to 4099 conditions per place. [2024-06-27 23:48:04,719 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 186 selfloop transitions, 147 changer transitions 0/338 dead transitions. [2024-06-27 23:48:04,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 338 transitions, 5716 flow [2024-06-27 23:48:04,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:48:04,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:48:04,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 23:48:04,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-27 23:48:04,721 INFO L175 Difference]: Start difference. First operand has 177 places, 284 transitions, 4474 flow. Second operand 9 states and 175 transitions. [2024-06-27 23:48:04,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 338 transitions, 5716 flow [2024-06-27 23:48:05,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 338 transitions, 5422 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 23:48:05,020 INFO L231 Difference]: Finished difference. Result has 182 places, 305 transitions, 5055 flow [2024-06-27 23:48:05,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4206, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5055, PETRI_PLACES=182, PETRI_TRANSITIONS=305} [2024-06-27 23:48:05,021 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-27 23:48:05,021 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 305 transitions, 5055 flow [2024-06-27 23:48:05,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:48:05,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:05,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:48:05,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 23:48:05,021 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)] === [2024-06-27 23:48:05,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:05,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1137831295, now seen corresponding path program 2 times [2024-06-27 23:48:05,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:05,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148960149] [2024-06-27 23:48:05,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:05,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:05,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:06,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:48:06,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:06,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148960149] [2024-06-27 23:48:06,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148960149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:06,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:06,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:48:06,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490858736] [2024-06-27 23:48:06,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:06,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:48:06,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:06,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:48:06,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:48:06,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:48:06,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 305 transitions, 5055 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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) [2024-06-27 23:48:06,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:06,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:48:06,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:08,116 INFO L124 PetriNetUnfolderBase]: 3218/4912 cut-off events. [2024-06-27 23:48:08,116 INFO L125 PetriNetUnfolderBase]: For 201678/201684 co-relation queries the response was YES. [2024-06-27 23:48:08,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37498 conditions, 4912 events. 3218/4912 cut-off events. For 201678/201684 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 25723 event pairs, 989 based on Foata normal form. 8/4915 useless extension candidates. Maximal degree in co-relation 37405. Up to 4448 conditions per place. [2024-06-27 23:48:08,154 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 260 selfloop transitions, 84 changer transitions 0/349 dead transitions. [2024-06-27 23:48:08,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 349 transitions, 6298 flow [2024-06-27 23:48:08,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:48:08,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:48:08,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 23:48:08,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-27 23:48:08,156 INFO L175 Difference]: Start difference. First operand has 182 places, 305 transitions, 5055 flow. Second operand 8 states and 155 transitions. [2024-06-27 23:48:08,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 349 transitions, 6298 flow [2024-06-27 23:48:08,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 349 transitions, 6104 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 23:48:08,429 INFO L231 Difference]: Finished difference. Result has 189 places, 323 transitions, 5361 flow [2024-06-27 23:48:08,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4867, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5361, PETRI_PLACES=189, PETRI_TRANSITIONS=323} [2024-06-27 23:48:08,430 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-27 23:48:08,430 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 323 transitions, 5361 flow [2024-06-27 23:48:08,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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) [2024-06-27 23:48:08,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:08,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:48:08,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 23:48:08,430 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:48:08,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:08,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1154476807, now seen corresponding path program 1 times [2024-06-27 23:48:08,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:08,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159309806] [2024-06-27 23:48:08,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:08,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:08,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:10,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:48:10,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:10,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159309806] [2024-06-27 23:48:10,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159309806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:10,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:10,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:48:10,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998595955] [2024-06-27 23:48:10,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:10,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:48:10,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:10,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:48:10,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:48:10,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:48:10,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 323 transitions, 5361 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) [2024-06-27 23:48:10,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:10,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:48:10,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:11,394 INFO L124 PetriNetUnfolderBase]: 3355/5057 cut-off events. [2024-06-27 23:48:11,394 INFO L125 PetriNetUnfolderBase]: For 211402/211404 co-relation queries the response was YES. [2024-06-27 23:48:11,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38644 conditions, 5057 events. 3355/5057 cut-off events. For 211402/211404 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 25924 event pairs, 1238 based on Foata normal form. 3/5059 useless extension candidates. Maximal degree in co-relation 38547. Up to 4959 conditions per place. [2024-06-27 23:48:11,443 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 308 selfloop transitions, 37 changer transitions 0/348 dead transitions. [2024-06-27 23:48:11,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 348 transitions, 6281 flow [2024-06-27 23:48:11,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:48:11,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:48:11,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 23:48:11,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-27 23:48:11,446 INFO L175 Difference]: Start difference. First operand has 189 places, 323 transitions, 5361 flow. Second operand 8 states and 135 transitions. [2024-06-27 23:48:11,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 348 transitions, 6281 flow [2024-06-27 23:48:11,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 348 transitions, 6165 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-27 23:48:11,748 INFO L231 Difference]: Finished difference. Result has 194 places, 329 transitions, 5424 flow [2024-06-27 23:48:11,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5245, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5424, PETRI_PLACES=194, PETRI_TRANSITIONS=329} [2024-06-27 23:48:11,748 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-27 23:48:11,748 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 329 transitions, 5424 flow [2024-06-27 23:48:11,749 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) [2024-06-27 23:48:11,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:11,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:48:11,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 23:48:11,749 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:48:11,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:11,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1137841525, now seen corresponding path program 3 times [2024-06-27 23:48:11,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:11,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386172378] [2024-06-27 23:48:11,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:11,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:11,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:13,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:48:13,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:13,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386172378] [2024-06-27 23:48:13,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386172378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:13,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:13,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:48:13,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977311394] [2024-06-27 23:48:13,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:13,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:48:13,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:13,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:48:13,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:48:13,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:48:13,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 329 transitions, 5424 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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) [2024-06-27 23:48:13,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:13,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:48:13,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:14,719 INFO L124 PetriNetUnfolderBase]: 3231/4928 cut-off events. [2024-06-27 23:48:14,719 INFO L125 PetriNetUnfolderBase]: For 223261/223270 co-relation queries the response was YES. [2024-06-27 23:48:14,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38302 conditions, 4928 events. 3231/4928 cut-off events. For 223261/223270 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 25772 event pairs, 988 based on Foata normal form. 10/4933 useless extension candidates. Maximal degree in co-relation 38204. Up to 4463 conditions per place. [2024-06-27 23:48:14,771 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 263 selfloop transitions, 81 changer transitions 0/351 dead transitions. [2024-06-27 23:48:14,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 351 transitions, 6371 flow [2024-06-27 23:48:14,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:48:14,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:48:14,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 23:48:14,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-27 23:48:14,772 INFO L175 Difference]: Start difference. First operand has 194 places, 329 transitions, 5424 flow. Second operand 8 states and 149 transitions. [2024-06-27 23:48:14,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 351 transitions, 6371 flow [2024-06-27 23:48:15,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 351 transitions, 6290 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-27 23:48:15,111 INFO L231 Difference]: Finished difference. Result has 199 places, 329 transitions, 5514 flow [2024-06-27 23:48:15,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5343, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5514, PETRI_PLACES=199, PETRI_TRANSITIONS=329} [2024-06-27 23:48:15,112 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-27 23:48:15,112 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 329 transitions, 5514 flow [2024-06-27 23:48:15,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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) [2024-06-27 23:48:15,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:15,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:48:15,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 23:48:15,112 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)] === [2024-06-27 23:48:15,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:15,112 INFO L85 PathProgramCache]: Analyzing trace with hash 60765963, now seen corresponding path program 4 times [2024-06-27 23:48:15,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:15,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742310778] [2024-06-27 23:48:15,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:15,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:15,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:16,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:48:16,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:16,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742310778] [2024-06-27 23:48:16,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742310778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:16,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:16,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:48:16,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426402706] [2024-06-27 23:48:16,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:16,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:48:16,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:16,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:48:16,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:48:17,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:48:17,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 329 transitions, 5514 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:48:17,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:17,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:48:17,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:18,267 INFO L124 PetriNetUnfolderBase]: 3290/5030 cut-off events. [2024-06-27 23:48:18,268 INFO L125 PetriNetUnfolderBase]: For 237053/237053 co-relation queries the response was YES. [2024-06-27 23:48:18,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39485 conditions, 5030 events. 3290/5030 cut-off events. For 237053/237053 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 26534 event pairs, 1301 based on Foata normal form. 6/5031 useless extension candidates. Maximal degree in co-relation 39385. Up to 4380 conditions per place. [2024-06-27 23:48:18,312 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 233 selfloop transitions, 137 changer transitions 0/377 dead transitions. [2024-06-27 23:48:18,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 377 transitions, 6714 flow [2024-06-27 23:48:18,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:48:18,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:48:18,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 23:48:18,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 23:48:18,313 INFO L175 Difference]: Start difference. First operand has 199 places, 329 transitions, 5514 flow. Second operand 9 states and 162 transitions. [2024-06-27 23:48:18,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 377 transitions, 6714 flow [2024-06-27 23:48:18,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 377 transitions, 6514 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 23:48:18,679 INFO L231 Difference]: Finished difference. Result has 204 places, 345 transitions, 5966 flow [2024-06-27 23:48:18,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5327, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5966, PETRI_PLACES=204, PETRI_TRANSITIONS=345} [2024-06-27 23:48:18,680 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-27 23:48:18,680 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 345 transitions, 5966 flow [2024-06-27 23:48:18,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:48:18,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:18,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:48:18,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 23:48:18,681 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)] === [2024-06-27 23:48:18,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:18,681 INFO L85 PathProgramCache]: Analyzing trace with hash 66330153, now seen corresponding path program 5 times [2024-06-27 23:48:18,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:18,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720994647] [2024-06-27 23:48:18,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:18,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:18,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:20,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:48:20,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:20,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720994647] [2024-06-27 23:48:20,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720994647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:20,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:20,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:48:20,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285586561] [2024-06-27 23:48:20,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:20,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:48:20,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:20,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:48:20,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:48:20,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:48:20,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 345 transitions, 5966 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:48:20,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:20,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:48:20,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:22,271 INFO L124 PetriNetUnfolderBase]: 3368/5149 cut-off events. [2024-06-27 23:48:22,271 INFO L125 PetriNetUnfolderBase]: For 251075/251075 co-relation queries the response was YES. [2024-06-27 23:48:22,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41130 conditions, 5149 events. 3368/5149 cut-off events. For 251075/251075 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 27286 event pairs, 1305 based on Foata normal form. 4/5148 useless extension candidates. Maximal degree in co-relation 41029. Up to 4476 conditions per place. [2024-06-27 23:48:22,326 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 246 selfloop transitions, 142 changer transitions 0/395 dead transitions. [2024-06-27 23:48:22,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 395 transitions, 7326 flow [2024-06-27 23:48:22,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:48:22,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:48:22,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 23:48:22,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-27 23:48:22,328 INFO L175 Difference]: Start difference. First operand has 204 places, 345 transitions, 5966 flow. Second operand 8 states and 151 transitions. [2024-06-27 23:48:22,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 395 transitions, 7326 flow [2024-06-27 23:48:22,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 395 transitions, 7060 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 23:48:22,848 INFO L231 Difference]: Finished difference. Result has 207 places, 364 transitions, 6434 flow [2024-06-27 23:48:22,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5715, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6434, PETRI_PLACES=207, PETRI_TRANSITIONS=364} [2024-06-27 23:48:22,849 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-27 23:48:22,849 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 364 transitions, 6434 flow [2024-06-27 23:48:22,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:48:22,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:22,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:48:22,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 23:48:22,849 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)] === [2024-06-27 23:48:22,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:22,850 INFO L85 PathProgramCache]: Analyzing trace with hash 66337593, now seen corresponding path program 6 times [2024-06-27 23:48:22,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:22,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794898305] [2024-06-27 23:48:22,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:22,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:22,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:24,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:48:24,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:24,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794898305] [2024-06-27 23:48:24,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794898305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:24,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:24,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:48:24,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528658100] [2024-06-27 23:48:24,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:24,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:48:24,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:24,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:48:24,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:48:24,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:48:24,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 364 transitions, 6434 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:48:24,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:24,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:48:24,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:26,125 INFO L124 PetriNetUnfolderBase]: 3396/5186 cut-off events. [2024-06-27 23:48:26,125 INFO L125 PetriNetUnfolderBase]: For 263388/263388 co-relation queries the response was YES. [2024-06-27 23:48:26,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41784 conditions, 5186 events. 3396/5186 cut-off events. For 263388/263388 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 27443 event pairs, 1303 based on Foata normal form. 4/5185 useless extension candidates. Maximal degree in co-relation 41682. Up to 4292 conditions per place. [2024-06-27 23:48:26,180 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 232 selfloop transitions, 158 changer transitions 0/397 dead transitions. [2024-06-27 23:48:26,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 397 transitions, 7406 flow [2024-06-27 23:48:26,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:48:26,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:48:26,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 23:48:26,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-27 23:48:26,181 INFO L175 Difference]: Start difference. First operand has 207 places, 364 transitions, 6434 flow. Second operand 9 states and 160 transitions. [2024-06-27 23:48:26,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 397 transitions, 7406 flow [2024-06-27 23:48:26,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 397 transitions, 7157 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-27 23:48:26,641 INFO L231 Difference]: Finished difference. Result has 212 places, 368 transitions, 6585 flow [2024-06-27 23:48:26,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6185, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6585, PETRI_PLACES=212, PETRI_TRANSITIONS=368} [2024-06-27 23:48:26,641 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-27 23:48:26,642 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 368 transitions, 6585 flow [2024-06-27 23:48:26,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:48:26,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:26,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:48:26,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 23:48:26,642 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:48:26,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:26,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1269562999, now seen corresponding path program 4 times [2024-06-27 23:48:26,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:26,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644062057] [2024-06-27 23:48:26,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:26,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:26,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:28,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:48:28,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:28,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644062057] [2024-06-27 23:48:28,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644062057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:28,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:28,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:48:28,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931561240] [2024-06-27 23:48:28,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:28,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:48:28,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:28,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:48:28,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:48:28,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:48:28,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 368 transitions, 6585 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) [2024-06-27 23:48:28,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:28,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:48:28,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:29,223 INFO L124 PetriNetUnfolderBase]: 3569/5395 cut-off events. [2024-06-27 23:48:29,224 INFO L125 PetriNetUnfolderBase]: For 277026/277030 co-relation queries the response was YES. [2024-06-27 23:48:29,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43441 conditions, 5395 events. 3569/5395 cut-off events. For 277026/277030 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 28214 event pairs, 1431 based on Foata normal form. 6/5400 useless extension candidates. Maximal degree in co-relation 43338. Up to 5104 conditions per place. [2024-06-27 23:48:29,284 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 324 selfloop transitions, 79 changer transitions 0/406 dead transitions. [2024-06-27 23:48:29,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 406 transitions, 7874 flow [2024-06-27 23:48:29,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:48:29,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:48:29,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 23:48:29,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-27 23:48:29,285 INFO L175 Difference]: Start difference. First operand has 212 places, 368 transitions, 6585 flow. Second operand 7 states and 127 transitions. [2024-06-27 23:48:29,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 406 transitions, 7874 flow [2024-06-27 23:48:29,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 406 transitions, 7520 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-27 23:48:29,729 INFO L231 Difference]: Finished difference. Result has 214 places, 388 transitions, 6756 flow [2024-06-27 23:48:29,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6235, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6756, PETRI_PLACES=214, PETRI_TRANSITIONS=388} [2024-06-27 23:48:29,729 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-27 23:48:29,730 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 388 transitions, 6756 flow [2024-06-27 23:48:29,730 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) [2024-06-27 23:48:29,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:29,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:48:29,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 23:48:29,730 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:48:29,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:29,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1269861901, now seen corresponding path program 2 times [2024-06-27 23:48:29,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:29,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933060189] [2024-06-27 23:48:29,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:29,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:29,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:31,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:48:31,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:31,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933060189] [2024-06-27 23:48:31,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933060189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:31,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:31,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:48:31,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470791733] [2024-06-27 23:48:31,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:31,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:48:31,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:31,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:48:31,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:48:31,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:48:31,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 388 transitions, 6756 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) [2024-06-27 23:48:31,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:31,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:48:31,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:32,393 INFO L124 PetriNetUnfolderBase]: 3579/5402 cut-off events. [2024-06-27 23:48:32,393 INFO L125 PetriNetUnfolderBase]: For 285388/285388 co-relation queries the response was YES. [2024-06-27 23:48:32,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43661 conditions, 5402 events. 3579/5402 cut-off events. For 285388/285388 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 28195 event pairs, 1458 based on Foata normal form. 1/5402 useless extension candidates. Maximal degree in co-relation 43555. Up to 5304 conditions per place. [2024-06-27 23:48:32,454 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 370 selfloop transitions, 34 changer transitions 0/407 dead transitions. [2024-06-27 23:48:32,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 407 transitions, 7757 flow [2024-06-27 23:48:32,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:48:32,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:48:32,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 23:48:32,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 23:48:32,455 INFO L175 Difference]: Start difference. First operand has 214 places, 388 transitions, 6756 flow. Second operand 8 states and 126 transitions. [2024-06-27 23:48:32,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 407 transitions, 7757 flow [2024-06-27 23:48:32,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 407 transitions, 7663 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-27 23:48:32,899 INFO L231 Difference]: Finished difference. Result has 219 places, 394 transitions, 6813 flow [2024-06-27 23:48:32,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6662, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6813, PETRI_PLACES=219, PETRI_TRANSITIONS=394} [2024-06-27 23:48:32,899 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-27 23:48:32,899 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 394 transitions, 6813 flow [2024-06-27 23:48:32,900 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) [2024-06-27 23:48:32,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:32,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:48:32,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 23:48:32,900 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:48:32,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:32,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1859542193, now seen corresponding path program 5 times [2024-06-27 23:48:32,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:32,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097762290] [2024-06-27 23:48:32,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:32,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:32,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:34,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:48:34,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:34,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097762290] [2024-06-27 23:48:34,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097762290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:34,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:34,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:48:34,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159268630] [2024-06-27 23:48:34,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:34,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:48:34,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:34,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:48:34,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:48:34,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:48:34,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 394 transitions, 6813 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) [2024-06-27 23:48:34,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:34,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:48:34,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:35,485 INFO L124 PetriNetUnfolderBase]: 3607/5447 cut-off events. [2024-06-27 23:48:35,485 INFO L125 PetriNetUnfolderBase]: For 298997/299001 co-relation queries the response was YES. [2024-06-27 23:48:35,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44197 conditions, 5447 events. 3607/5447 cut-off events. For 298997/299001 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 28516 event pairs, 1436 based on Foata normal form. 6/5452 useless extension candidates. Maximal degree in co-relation 44090. Up to 5146 conditions per place. [2024-06-27 23:48:35,545 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 336 selfloop transitions, 78 changer transitions 0/417 dead transitions. [2024-06-27 23:48:35,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 417 transitions, 8017 flow [2024-06-27 23:48:35,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:48:35,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:48:35,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 23:48:35,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-27 23:48:35,546 INFO L175 Difference]: Start difference. First operand has 219 places, 394 transitions, 6813 flow. Second operand 7 states and 123 transitions. [2024-06-27 23:48:35,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 417 transitions, 8017 flow [2024-06-27 23:48:36,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 417 transitions, 7931 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 23:48:36,053 INFO L231 Difference]: Finished difference. Result has 223 places, 403 transitions, 7135 flow [2024-06-27 23:48:36,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6727, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7135, PETRI_PLACES=223, PETRI_TRANSITIONS=403} [2024-06-27 23:48:36,054 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-27 23:48:36,054 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 403 transitions, 7135 flow [2024-06-27 23:48:36,054 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) [2024-06-27 23:48:36,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:36,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:48:36,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 23:48:36,055 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)] === [2024-06-27 23:48:36,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:36,055 INFO L85 PathProgramCache]: Analyzing trace with hash 543644123, now seen corresponding path program 7 times [2024-06-27 23:48:36,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:36,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968410861] [2024-06-27 23:48:36,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:36,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:36,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:38,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:48:38,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:38,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968410861] [2024-06-27 23:48:38,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968410861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:38,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:38,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:48:38,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87082173] [2024-06-27 23:48:38,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:38,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:48:38,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:38,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:48:38,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:48:38,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:48:38,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 403 transitions, 7135 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:48:38,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:38,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:48:38,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:39,587 INFO L124 PetriNetUnfolderBase]: 3529/5379 cut-off events. [2024-06-27 23:48:39,587 INFO L125 PetriNetUnfolderBase]: For 317713/317713 co-relation queries the response was YES. [2024-06-27 23:48:39,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44962 conditions, 5379 events. 3529/5379 cut-off events. For 317713/317713 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 28624 event pairs, 1346 based on Foata normal form. 4/5378 useless extension candidates. Maximal degree in co-relation 44852. Up to 4370 conditions per place. [2024-06-27 23:48:39,639 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 258 selfloop transitions, 165 changer transitions 0/432 dead transitions. [2024-06-27 23:48:39,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 432 transitions, 8339 flow [2024-06-27 23:48:39,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:48:39,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:48:39,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 23:48:39,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-27 23:48:39,641 INFO L175 Difference]: Start difference. First operand has 223 places, 403 transitions, 7135 flow. Second operand 8 states and 145 transitions. [2024-06-27 23:48:39,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 432 transitions, 8339 flow [2024-06-27 23:48:40,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 432 transitions, 8231 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 23:48:40,162 INFO L231 Difference]: Finished difference. Result has 228 places, 407 transitions, 7490 flow [2024-06-27 23:48:40,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7027, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7490, PETRI_PLACES=228, PETRI_TRANSITIONS=407} [2024-06-27 23:48:40,163 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-27 23:48:40,163 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 407 transitions, 7490 flow [2024-06-27 23:48:40,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:48:40,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:40,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:48:40,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 23:48:40,163 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)] === [2024-06-27 23:48:40,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:40,164 INFO L85 PathProgramCache]: Analyzing trace with hash 543636683, now seen corresponding path program 8 times [2024-06-27 23:48:40,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:40,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033239089] [2024-06-27 23:48:40,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:40,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:40,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:41,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:48:41,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:41,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033239089] [2024-06-27 23:48:41,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033239089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:41,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:41,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:48:41,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433118667] [2024-06-27 23:48:41,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:41,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:48:41,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:41,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:48:41,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:48:42,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:48:42,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 407 transitions, 7490 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:48:42,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:42,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:48:42,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:43,349 INFO L124 PetriNetUnfolderBase]: 3521/5366 cut-off events. [2024-06-27 23:48:43,349 INFO L125 PetriNetUnfolderBase]: For 331219/331223 co-relation queries the response was YES. [2024-06-27 23:48:43,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45541 conditions, 5366 events. 3521/5366 cut-off events. For 331219/331223 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 28567 event pairs, 1383 based on Foata normal form. 8/5369 useless extension candidates. Maximal degree in co-relation 45430. Up to 5057 conditions per place. [2024-06-27 23:48:43,412 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 381 selfloop transitions, 48 changer transitions 0/438 dead transitions. [2024-06-27 23:48:43,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 438 transitions, 8518 flow [2024-06-27 23:48:43,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:48:43,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:48:43,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 23:48:43,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-27 23:48:43,413 INFO L175 Difference]: Start difference. First operand has 228 places, 407 transitions, 7490 flow. Second operand 8 states and 145 transitions. [2024-06-27 23:48:43,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 438 transitions, 8518 flow [2024-06-27 23:48:44,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 438 transitions, 8309 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-27 23:48:44,016 INFO L231 Difference]: Finished difference. Result has 232 places, 407 transitions, 7387 flow [2024-06-27 23:48:44,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7281, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7387, PETRI_PLACES=232, PETRI_TRANSITIONS=407} [2024-06-27 23:48:44,016 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 189 predicate places. [2024-06-27 23:48:44,017 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 407 transitions, 7387 flow [2024-06-27 23:48:44,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:48:44,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:44,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:48:44,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 23:48:44,017 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)] === [2024-06-27 23:48:44,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:44,017 INFO L85 PathProgramCache]: Analyzing trace with hash 552840893, now seen corresponding path program 9 times [2024-06-27 23:48:44,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:44,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928431695] [2024-06-27 23:48:44,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:44,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:44,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:45,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:48:45,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:45,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928431695] [2024-06-27 23:48:45,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928431695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:45,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:45,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:48:45,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136660277] [2024-06-27 23:48:45,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:45,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:48:45,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:45,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:48:45,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:48:45,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:48:45,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 407 transitions, 7387 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:48:45,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:45,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:48:45,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:46,926 INFO L124 PetriNetUnfolderBase]: 3513/5354 cut-off events. [2024-06-27 23:48:46,926 INFO L125 PetriNetUnfolderBase]: For 336563/336567 co-relation queries the response was YES. [2024-06-27 23:48:46,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45501 conditions, 5354 events. 3513/5354 cut-off events. For 336563/336567 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 28442 event pairs, 1361 based on Foata normal form. 8/5357 useless extension candidates. Maximal degree in co-relation 45388. Up to 5096 conditions per place. [2024-06-27 23:48:46,987 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 402 selfloop transitions, 23 changer transitions 0/434 dead transitions. [2024-06-27 23:48:46,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 434 transitions, 8399 flow [2024-06-27 23:48:46,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:48:46,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:48:46,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 23:48:46,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-27 23:48:46,988 INFO L175 Difference]: Start difference. First operand has 232 places, 407 transitions, 7387 flow. Second operand 9 states and 152 transitions. [2024-06-27 23:48:46,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 434 transitions, 8399 flow [2024-06-27 23:48:47,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 434 transitions, 8094 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-27 23:48:47,540 INFO L231 Difference]: Finished difference. Result has 233 places, 409 transitions, 7199 flow [2024-06-27 23:48:47,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7082, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7199, PETRI_PLACES=233, PETRI_TRANSITIONS=409} [2024-06-27 23:48:47,540 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-27 23:48:47,540 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 409 transitions, 7199 flow [2024-06-27 23:48:47,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:48:47,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:47,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:48:47,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 23:48:47,541 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:48:47,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:47,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1504863071, now seen corresponding path program 3 times [2024-06-27 23:48:47,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:47,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685669818] [2024-06-27 23:48:47,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:47,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:47,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:48,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:48:48,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:48,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685669818] [2024-06-27 23:48:48,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685669818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:48,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:48,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:48:48,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425344615] [2024-06-27 23:48:48,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:48,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:48:48,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:48,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:48:48,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:48:48,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:48:48,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 409 transitions, 7199 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) [2024-06-27 23:48:48,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:48,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:48:48,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:50,099 INFO L124 PetriNetUnfolderBase]: 3638/5488 cut-off events. [2024-06-27 23:48:50,099 INFO L125 PetriNetUnfolderBase]: For 345425/345425 co-relation queries the response was YES. [2024-06-27 23:48:50,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46030 conditions, 5488 events. 3638/5488 cut-off events. For 345425/345425 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 28660 event pairs, 1467 based on Foata normal form. 1/5488 useless extension candidates. Maximal degree in co-relation 45918. Up to 5423 conditions per place. [2024-06-27 23:48:50,163 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 402 selfloop transitions, 16 changer transitions 0/421 dead transitions. [2024-06-27 23:48:50,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 421 transitions, 8120 flow [2024-06-27 23:48:50,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:48:50,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:48:50,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-27 23:48:50,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3707482993197279 [2024-06-27 23:48:50,164 INFO L175 Difference]: Start difference. First operand has 233 places, 409 transitions, 7199 flow. Second operand 7 states and 109 transitions. [2024-06-27 23:48:50,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 421 transitions, 8120 flow [2024-06-27 23:48:50,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 421 transitions, 8021 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-27 23:48:50,813 INFO L231 Difference]: Finished difference. Result has 233 places, 412 transitions, 7199 flow [2024-06-27 23:48:50,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7100, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7199, PETRI_PLACES=233, PETRI_TRANSITIONS=412} [2024-06-27 23:48:50,814 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-27 23:48:50,814 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 412 transitions, 7199 flow [2024-06-27 23:48:50,814 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) [2024-06-27 23:48:50,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:50,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:48:50,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 23:48:50,814 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:48:50,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:50,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1069560499, now seen corresponding path program 6 times [2024-06-27 23:48:50,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:50,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129341360] [2024-06-27 23:48:50,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:50,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:50,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:52,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:48:52,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:52,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129341360] [2024-06-27 23:48:52,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129341360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:52,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:52,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:48:52,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392306218] [2024-06-27 23:48:52,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:52,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:48:52,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:52,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:48:52,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:48:52,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:48:52,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 412 transitions, 7199 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) [2024-06-27 23:48:52,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:52,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:48:52,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:53,388 INFO L124 PetriNetUnfolderBase]: 3634/5484 cut-off events. [2024-06-27 23:48:53,389 INFO L125 PetriNetUnfolderBase]: For 355373/355377 co-relation queries the response was YES. [2024-06-27 23:48:53,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45952 conditions, 5484 events. 3634/5484 cut-off events. For 355373/355377 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 28674 event pairs, 1458 based on Foata normal form. 6/5489 useless extension candidates. Maximal degree in co-relation 45839. Up to 5383 conditions per place. [2024-06-27 23:48:53,450 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 389 selfloop transitions, 30 changer transitions 0/422 dead transitions. [2024-06-27 23:48:53,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 422 transitions, 8165 flow [2024-06-27 23:48:53,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:48:53,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:48:53,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-27 23:48:53,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-27 23:48:53,451 INFO L175 Difference]: Start difference. First operand has 233 places, 412 transitions, 7199 flow. Second operand 7 states and 115 transitions. [2024-06-27 23:48:53,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 422 transitions, 8165 flow [2024-06-27 23:48:54,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 422 transitions, 8077 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-27 23:48:54,100 INFO L231 Difference]: Finished difference. Result has 235 places, 412 transitions, 7179 flow [2024-06-27 23:48:54,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7111, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7179, PETRI_PLACES=235, PETRI_TRANSITIONS=412} [2024-06-27 23:48:54,100 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-27 23:48:54,100 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 412 transitions, 7179 flow [2024-06-27 23:48:54,100 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) [2024-06-27 23:48:54,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:54,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:48:54,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 23:48:54,101 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:48:54,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:54,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1849364831, now seen corresponding path program 4 times [2024-06-27 23:48:54,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:54,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338004298] [2024-06-27 23:48:54,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:54,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:54,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:55,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:48:55,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:55,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338004298] [2024-06-27 23:48:55,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338004298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:55,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:55,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:48:55,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261729225] [2024-06-27 23:48:55,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:55,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:48:55,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:55,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:48:55,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:48:55,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:48:55,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 412 transitions, 7179 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) [2024-06-27 23:48:55,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:55,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:48:55,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:56,841 INFO L124 PetriNetUnfolderBase]: 3631/5479 cut-off events. [2024-06-27 23:48:56,841 INFO L125 PetriNetUnfolderBase]: For 365801/365801 co-relation queries the response was YES. [2024-06-27 23:48:56,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46123 conditions, 5479 events. 3631/5479 cut-off events. For 365801/365801 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 28646 event pairs, 1465 based on Foata normal form. 1/5479 useless extension candidates. Maximal degree in co-relation 46009. Up to 5408 conditions per place. [2024-06-27 23:48:56,891 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 397 selfloop transitions, 21 changer transitions 0/421 dead transitions. [2024-06-27 23:48:56,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 421 transitions, 8045 flow [2024-06-27 23:48:56,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:48:56,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:48:56,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-27 23:48:56,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-27 23:48:56,892 INFO L175 Difference]: Start difference. First operand has 235 places, 412 transitions, 7179 flow. Second operand 7 states and 111 transitions. [2024-06-27 23:48:56,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 421 transitions, 8045 flow [2024-06-27 23:48:57,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 421 transitions, 7917 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 23:48:57,494 INFO L231 Difference]: Finished difference. Result has 237 places, 412 transitions, 7099 flow [2024-06-27 23:48:57,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7051, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7099, PETRI_PLACES=237, PETRI_TRANSITIONS=412} [2024-06-27 23:48:57,495 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-27 23:48:57,495 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 412 transitions, 7099 flow [2024-06-27 23:48:57,495 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) [2024-06-27 23:48:57,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:57,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:48:57,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 23:48:57,495 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:48:57,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:57,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1063311457, now seen corresponding path program 1 times [2024-06-27 23:48:57,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:57,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481540497] [2024-06-27 23:48:57,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:57,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:57,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:59,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:48:59,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:59,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481540497] [2024-06-27 23:48:59,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481540497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:59,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:59,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:48:59,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470844090] [2024-06-27 23:48:59,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:59,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:48:59,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:59,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:48:59,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:48:59,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:48:59,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 412 transitions, 7099 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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) [2024-06-27 23:48:59,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:59,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:48:59,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:49:00,852 INFO L124 PetriNetUnfolderBase]: 3526/5373 cut-off events. [2024-06-27 23:49:00,852 INFO L125 PetriNetUnfolderBase]: For 379956/379956 co-relation queries the response was YES. [2024-06-27 23:49:00,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45701 conditions, 5373 events. 3526/5373 cut-off events. For 379956/379956 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 28544 event pairs, 1392 based on Foata normal form. 2/5370 useless extension candidates. Maximal degree in co-relation 45587. Up to 5167 conditions per place. [2024-06-27 23:49:00,917 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 399 selfloop transitions, 24 changer transitions 0/433 dead transitions. [2024-06-27 23:49:00,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 433 transitions, 8069 flow [2024-06-27 23:49:00,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:49:00,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:49:00,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 23:49:00,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-27 23:49:00,918 INFO L175 Difference]: Start difference. First operand has 237 places, 412 transitions, 7099 flow. Second operand 8 states and 134 transitions. [2024-06-27 23:49:00,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 433 transitions, 8069 flow [2024-06-27 23:49:01,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 433 transitions, 7994 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 23:49:01,625 INFO L231 Difference]: Finished difference. Result has 239 places, 418 transitions, 7161 flow [2024-06-27 23:49:01,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7024, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7161, PETRI_PLACES=239, PETRI_TRANSITIONS=418} [2024-06-27 23:49:01,625 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-27 23:49:01,625 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 418 transitions, 7161 flow [2024-06-27 23:49:01,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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) [2024-06-27 23:49:01,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:49:01,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:49:01,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 23:49:01,626 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:49:01,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:49:01,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1682225975, now seen corresponding path program 2 times [2024-06-27 23:49:01,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:49:01,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276982134] [2024-06-27 23:49:01,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:49:01,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:49:01,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:49:03,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:49:03,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:49:03,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276982134] [2024-06-27 23:49:03,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276982134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:49:03,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:49:03,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:49:03,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870561399] [2024-06-27 23:49:03,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:49:03,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:49:03,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:49:03,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:49:03,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:49:03,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:49:03,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 418 transitions, 7161 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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) [2024-06-27 23:49:03,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:49:03,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:49:03,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:49:04,945 INFO L124 PetriNetUnfolderBase]: 3536/5395 cut-off events. [2024-06-27 23:49:04,946 INFO L125 PetriNetUnfolderBase]: For 392653/392653 co-relation queries the response was YES. [2024-06-27 23:49:04,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46458 conditions, 5395 events. 3536/5395 cut-off events. For 392653/392653 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 28708 event pairs, 1393 based on Foata normal form. 2/5396 useless extension candidates. Maximal degree in co-relation 46343. Up to 5155 conditions per place. [2024-06-27 23:49:05,009 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 395 selfloop transitions, 35 changer transitions 0/440 dead transitions. [2024-06-27 23:49:05,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 440 transitions, 8273 flow [2024-06-27 23:49:05,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:49:05,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:49:05,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 23:49:05,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 23:49:05,010 INFO L175 Difference]: Start difference. First operand has 239 places, 418 transitions, 7161 flow. Second operand 7 states and 126 transitions. [2024-06-27 23:49:05,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 440 transitions, 8273 flow [2024-06-27 23:49:05,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 440 transitions, 8210 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 23:49:05,651 INFO L231 Difference]: Finished difference. Result has 240 places, 424 transitions, 7267 flow [2024-06-27 23:49:05,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7098, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7267, PETRI_PLACES=240, PETRI_TRANSITIONS=424} [2024-06-27 23:49:05,651 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-27 23:49:05,651 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 424 transitions, 7267 flow [2024-06-27 23:49:05,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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) [2024-06-27 23:49:05,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:49:05,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:49:05,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 23:49:05,652 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:49:05,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:49:05,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1682225789, now seen corresponding path program 1 times [2024-06-27 23:49:05,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:49:05,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853476766] [2024-06-27 23:49:05,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:49:05,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:49:05,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:49:07,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:49:07,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:49:07,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853476766] [2024-06-27 23:49:07,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853476766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:49:07,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:49:07,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:49:07,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066834524] [2024-06-27 23:49:07,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:49:07,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:49:07,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:49:07,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:49:07,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:49:07,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:49:07,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 424 transitions, 7267 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) [2024-06-27 23:49:07,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:49:07,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:49:07,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:49:08,939 INFO L124 PetriNetUnfolderBase]: 3661/5522 cut-off events. [2024-06-27 23:49:08,939 INFO L125 PetriNetUnfolderBase]: For 405676/405676 co-relation queries the response was YES. [2024-06-27 23:49:08,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47759 conditions, 5522 events. 3661/5522 cut-off events. For 405676/405676 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 28852 event pairs, 1463 based on Foata normal form. 1/5522 useless extension candidates. Maximal degree in co-relation 47642. Up to 5428 conditions per place. [2024-06-27 23:49:09,001 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 408 selfloop transitions, 31 changer transitions 0/442 dead transitions. [2024-06-27 23:49:09,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 442 transitions, 8363 flow [2024-06-27 23:49:09,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:49:09,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:49:09,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-27 23:49:09,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-27 23:49:09,002 INFO L175 Difference]: Start difference. First operand has 240 places, 424 transitions, 7267 flow. Second operand 7 states and 117 transitions. [2024-06-27 23:49:09,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 442 transitions, 8363 flow [2024-06-27 23:49:09,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 442 transitions, 8338 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-27 23:49:09,735 INFO L231 Difference]: Finished difference. Result has 245 places, 430 transitions, 7395 flow [2024-06-27 23:49:09,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7242, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7395, PETRI_PLACES=245, PETRI_TRANSITIONS=430} [2024-06-27 23:49:09,736 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-27 23:49:09,736 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 430 transitions, 7395 flow [2024-06-27 23:49:09,736 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) [2024-06-27 23:49:09,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:49:09,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:49:09,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 23:49:09,736 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:49:09,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:49:09,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1596152167, now seen corresponding path program 3 times [2024-06-27 23:49:09,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:49:09,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530450269] [2024-06-27 23:49:09,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:49:09,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:49:09,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:49:11,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:49:11,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:49:11,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530450269] [2024-06-27 23:49:11,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530450269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:49:11,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:49:11,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:49:11,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847842116] [2024-06-27 23:49:11,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:49:11,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:49:11,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:49:11,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:49:11,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:49:11,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:49:11,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 430 transitions, 7395 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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) [2024-06-27 23:49:11,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:49:11,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:49:11,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:49:13,122 INFO L124 PetriNetUnfolderBase]: 3547/5407 cut-off events. [2024-06-27 23:49:13,122 INFO L125 PetriNetUnfolderBase]: For 420775/420775 co-relation queries the response was YES. [2024-06-27 23:49:13,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47705 conditions, 5407 events. 3547/5407 cut-off events. For 420775/420775 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 28689 event pairs, 1399 based on Foata normal form. 2/5408 useless extension candidates. Maximal degree in co-relation 47584. Up to 5167 conditions per place. [2024-06-27 23:49:13,179 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 395 selfloop transitions, 34 changer transitions 0/441 dead transitions. [2024-06-27 23:49:13,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 441 transitions, 8295 flow [2024-06-27 23:49:13,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:49:13,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:49:13,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 23:49:13,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-27 23:49:13,181 INFO L175 Difference]: Start difference. First operand has 245 places, 430 transitions, 7395 flow. Second operand 7 states and 122 transitions. [2024-06-27 23:49:13,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 441 transitions, 8295 flow [2024-06-27 23:49:13,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 441 transitions, 8217 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 23:49:13,862 INFO L231 Difference]: Finished difference. Result has 247 places, 430 transitions, 7393 flow [2024-06-27 23:49:13,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7317, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7393, PETRI_PLACES=247, PETRI_TRANSITIONS=430} [2024-06-27 23:49:13,863 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-27 23:49:13,863 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 430 transitions, 7393 flow [2024-06-27 23:49:13,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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) [2024-06-27 23:49:13,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:49:13,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:49:13,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 23:49:13,864 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:49:13,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:49:13,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1069982533, now seen corresponding path program 2 times [2024-06-27 23:49:13,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:49:13,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477174411] [2024-06-27 23:49:13,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:49:13,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:49:13,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:49:15,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:49:15,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:49:15,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477174411] [2024-06-27 23:49:15,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477174411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:49:15,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:49:15,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:49:15,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645913156] [2024-06-27 23:49:15,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:49:15,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:49:15,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:49:15,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:49:15,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:49:15,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:49:15,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 430 transitions, 7393 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) [2024-06-27 23:49:15,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:49:15,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:49:15,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:49:17,062 INFO L124 PetriNetUnfolderBase]: 3660/5521 cut-off events. [2024-06-27 23:49:17,062 INFO L125 PetriNetUnfolderBase]: For 431761/431765 co-relation queries the response was YES. [2024-06-27 23:49:17,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48613 conditions, 5521 events. 3660/5521 cut-off events. For 431761/431765 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 28826 event pairs, 1455 based on Foata normal form. 5/5525 useless extension candidates. Maximal degree in co-relation 48489. Up to 5426 conditions per place. [2024-06-27 23:49:17,129 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 405 selfloop transitions, 35 changer transitions 0/443 dead transitions. [2024-06-27 23:49:17,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 443 transitions, 8453 flow [2024-06-27 23:49:17,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:49:17,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:49:17,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-27 23:49:17,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-27 23:49:17,130 INFO L175 Difference]: Start difference. First operand has 247 places, 430 transitions, 7393 flow. Second operand 7 states and 113 transitions. [2024-06-27 23:49:17,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 443 transitions, 8453 flow [2024-06-27 23:49:17,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 443 transitions, 8378 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 23:49:17,992 INFO L231 Difference]: Finished difference. Result has 249 places, 433 transitions, 7436 flow [2024-06-27 23:49:17,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7318, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7436, PETRI_PLACES=249, PETRI_TRANSITIONS=433} [2024-06-27 23:49:17,992 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 206 predicate places. [2024-06-27 23:49:17,992 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 433 transitions, 7436 flow [2024-06-27 23:49:17,992 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) [2024-06-27 23:49:17,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:49:17,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:49:17,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 23:49:17,993 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:49:17,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:49:17,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1069745383, now seen corresponding path program 3 times [2024-06-27 23:49:17,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:49:17,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007242109] [2024-06-27 23:49:17,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:49:17,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:49:18,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:49:19,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:49:19,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:49:19,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007242109] [2024-06-27 23:49:19,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007242109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:49:19,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:49:19,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:49:19,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657096464] [2024-06-27 23:49:19,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:49:19,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:49:19,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:49:19,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:49:19,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:49:19,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:49:19,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 433 transitions, 7436 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) [2024-06-27 23:49:19,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:49:19,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:49:19,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:49:21,216 INFO L124 PetriNetUnfolderBase]: 3657/5517 cut-off events. [2024-06-27 23:49:21,217 INFO L125 PetriNetUnfolderBase]: For 443674/443678 co-relation queries the response was YES. [2024-06-27 23:49:21,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48758 conditions, 5517 events. 3657/5517 cut-off events. For 443674/443678 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 28807 event pairs, 1455 based on Foata normal form. 5/5521 useless extension candidates. Maximal degree in co-relation 48632. Up to 5423 conditions per place. [2024-06-27 23:49:21,283 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 406 selfloop transitions, 33 changer transitions 0/442 dead transitions. [2024-06-27 23:49:21,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 442 transitions, 8344 flow [2024-06-27 23:49:21,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:49:21,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:49:21,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-27 23:49:21,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-27 23:49:21,284 INFO L175 Difference]: Start difference. First operand has 249 places, 433 transitions, 7436 flow. Second operand 7 states and 113 transitions. [2024-06-27 23:49:21,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 442 transitions, 8344 flow [2024-06-27 23:49:22,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 442 transitions, 8233 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-27 23:49:22,137 INFO L231 Difference]: Finished difference. Result has 252 places, 433 transitions, 7399 flow [2024-06-27 23:49:22,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7325, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7399, PETRI_PLACES=252, PETRI_TRANSITIONS=433} [2024-06-27 23:49:22,138 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-27 23:49:22,138 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 433 transitions, 7399 flow [2024-06-27 23:49:22,138 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) [2024-06-27 23:49:22,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:49:22,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:49:22,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 23:49:22,139 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:49:22,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:49:22,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1153252368, now seen corresponding path program 1 times [2024-06-27 23:49:22,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:49:22,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27546868] [2024-06-27 23:49:22,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:49:22,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:49:22,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:49:23,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:49:23,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:49:23,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27546868] [2024-06-27 23:49:23,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27546868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:49:23,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:49:23,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:49:23,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235401393] [2024-06-27 23:49:23,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:49:23,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:49:23,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:49:23,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:49:23,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:49:23,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:49:23,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 433 transitions, 7399 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) [2024-06-27 23:49:23,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:49:23,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:49:23,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:49:24,979 INFO L124 PetriNetUnfolderBase]: 3586/5458 cut-off events. [2024-06-27 23:49:24,979 INFO L125 PetriNetUnfolderBase]: For 460952/460963 co-relation queries the response was YES. [2024-06-27 23:49:25,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48767 conditions, 5458 events. 3586/5458 cut-off events. For 460952/460963 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 28933 event pairs, 868 based on Foata normal form. 12/5469 useless extension candidates. Maximal degree in co-relation 48638. Up to 4761 conditions per place. [2024-06-27 23:49:25,045 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 339 selfloop transitions, 129 changer transitions 0/481 dead transitions. [2024-06-27 23:49:25,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 481 transitions, 8908 flow [2024-06-27 23:49:25,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:49:25,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:49:25,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 23:49:25,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-27 23:49:25,052 INFO L175 Difference]: Start difference. First operand has 252 places, 433 transitions, 7399 flow. Second operand 8 states and 158 transitions. [2024-06-27 23:49:25,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 481 transitions, 8908 flow [2024-06-27 23:49:25,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 481 transitions, 8867 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 23:49:25,765 INFO L231 Difference]: Finished difference. Result has 260 places, 453 transitions, 8044 flow [2024-06-27 23:49:25,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7358, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8044, PETRI_PLACES=260, PETRI_TRANSITIONS=453} [2024-06-27 23:49:25,766 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-27 23:49:25,766 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 453 transitions, 8044 flow [2024-06-27 23:49:25,766 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) [2024-06-27 23:49:25,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:49:25,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:49:25,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 23:49:25,766 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)] === [2024-06-27 23:49:25,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:49:25,766 INFO L85 PathProgramCache]: Analyzing trace with hash -737624844, now seen corresponding path program 1 times [2024-06-27 23:49:25,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:49:25,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858733445] [2024-06-27 23:49:25,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:49:25,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:49:25,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:49:28,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:49:28,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:49:28,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858733445] [2024-06-27 23:49:28,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858733445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:49:28,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:49:28,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:49:28,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284706151] [2024-06-27 23:49:28,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:49:28,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:49:28,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:49:28,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:49:28,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:49:28,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:49:28,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 453 transitions, 8044 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:49:28,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:49:28,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:49:28,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:49:29,952 INFO L124 PetriNetUnfolderBase]: 3626/5540 cut-off events. [2024-06-27 23:49:29,952 INFO L125 PetriNetUnfolderBase]: For 495649/495661 co-relation queries the response was YES. [2024-06-27 23:49:29,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50986 conditions, 5540 events. 3626/5540 cut-off events. For 495649/495661 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 29663 event pairs, 969 based on Foata normal form. 22/5561 useless extension candidates. Maximal degree in co-relation 50852. Up to 4528 conditions per place. [2024-06-27 23:49:30,023 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 294 selfloop transitions, 184 changer transitions 0/491 dead transitions. [2024-06-27 23:49:30,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 491 transitions, 9243 flow [2024-06-27 23:49:30,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:49:30,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:49:30,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-27 23:49:30,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-27 23:49:30,024 INFO L175 Difference]: Start difference. First operand has 260 places, 453 transitions, 8044 flow. Second operand 9 states and 179 transitions. [2024-06-27 23:49:30,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 491 transitions, 9243 flow [2024-06-27 23:49:30,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 491 transitions, 9129 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-27 23:49:30,844 INFO L231 Difference]: Finished difference. Result has 266 places, 454 transitions, 8349 flow [2024-06-27 23:49:30,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7930, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8349, PETRI_PLACES=266, PETRI_TRANSITIONS=454} [2024-06-27 23:49:30,844 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-27 23:49:30,844 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 454 transitions, 8349 flow [2024-06-27 23:49:30,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:49:30,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:49:30,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:49:30,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 23:49:30,845 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:49:30,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:49:30,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1026068444, now seen corresponding path program 2 times [2024-06-27 23:49:30,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:49:30,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375498248] [2024-06-27 23:49:30,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:49:30,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:49:30,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:49:33,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:49:33,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:49:33,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375498248] [2024-06-27 23:49:33,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375498248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:49:33,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:49:33,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:49:33,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565770629] [2024-06-27 23:49:33,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:49:33,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:49:33,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:49:33,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:49:33,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:49:33,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:49:33,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 454 transitions, 8349 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:49:33,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:49:33,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:49:33,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:49:34,550 INFO L124 PetriNetUnfolderBase]: 3635/5540 cut-off events. [2024-06-27 23:49:34,551 INFO L125 PetriNetUnfolderBase]: For 488654/488668 co-relation queries the response was YES. [2024-06-27 23:49:34,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51648 conditions, 5540 events. 3635/5540 cut-off events. For 488654/488668 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 29606 event pairs, 979 based on Foata normal form. 14/5551 useless extension candidates. Maximal degree in co-relation 51513. Up to 4899 conditions per place. [2024-06-27 23:49:34,607 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 333 selfloop transitions, 140 changer transitions 0/486 dead transitions. [2024-06-27 23:49:34,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 486 transitions, 9695 flow [2024-06-27 23:49:34,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:49:34,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:49:34,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-27 23:49:34,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49107142857142855 [2024-06-27 23:49:34,608 INFO L175 Difference]: Start difference. First operand has 266 places, 454 transitions, 8349 flow. Second operand 8 states and 165 transitions. [2024-06-27 23:49:34,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 486 transitions, 9695 flow [2024-06-27 23:49:35,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 486 transitions, 9296 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-27 23:49:35,512 INFO L231 Difference]: Finished difference. Result has 268 places, 459 transitions, 8334 flow [2024-06-27 23:49:35,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7950, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8334, PETRI_PLACES=268, PETRI_TRANSITIONS=459} [2024-06-27 23:49:35,513 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-27 23:49:35,513 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 459 transitions, 8334 flow [2024-06-27 23:49:35,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:49:35,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:49:35,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:49:35,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 23:49:35,513 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:49:35,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:49:35,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1009164423, now seen corresponding path program 1 times [2024-06-27 23:49:35,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:49:35,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005581433] [2024-06-27 23:49:35,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:49:35,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:49:35,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:49:37,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:49:37,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:49:37,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005581433] [2024-06-27 23:49:37,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005581433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:49:37,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:49:37,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:49:37,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14419910] [2024-06-27 23:49:37,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:49:37,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:49:37,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:49:37,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:49:37,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:49:37,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:49:37,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 459 transitions, 8334 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:49:37,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:49:37,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:49:37,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:49:38,886 INFO L124 PetriNetUnfolderBase]: 3763/5676 cut-off events. [2024-06-27 23:49:38,886 INFO L125 PetriNetUnfolderBase]: For 500054/500069 co-relation queries the response was YES. [2024-06-27 23:49:38,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52476 conditions, 5676 events. 3763/5676 cut-off events. For 500054/500069 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 29817 event pairs, 1040 based on Foata normal form. 16/5691 useless extension candidates. Maximal degree in co-relation 52339. Up to 5136 conditions per place. [2024-06-27 23:49:38,957 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 353 selfloop transitions, 141 changer transitions 0/497 dead transitions. [2024-06-27 23:49:38,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 497 transitions, 9864 flow [2024-06-27 23:49:38,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:49:38,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:49:38,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 23:49:38,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-27 23:49:38,958 INFO L175 Difference]: Start difference. First operand has 268 places, 459 transitions, 8334 flow. Second operand 9 states and 163 transitions. [2024-06-27 23:49:38,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 497 transitions, 9864 flow [2024-06-27 23:49:39,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 497 transitions, 9578 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 23:49:39,971 INFO L231 Difference]: Finished difference. Result has 273 places, 471 transitions, 8642 flow [2024-06-27 23:49:39,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8048, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8642, PETRI_PLACES=273, PETRI_TRANSITIONS=471} [2024-06-27 23:49:39,971 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-27 23:49:39,971 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 471 transitions, 8642 flow [2024-06-27 23:49:39,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:49:39,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:49:39,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:49:39,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 23:49:39,972 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:49:39,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:49:39,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1025799674, now seen corresponding path program 3 times [2024-06-27 23:49:39,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:49:39,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806347333] [2024-06-27 23:49:39,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:49:39,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:49:39,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:49:41,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:49:41,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:49:41,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806347333] [2024-06-27 23:49:41,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806347333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:49:41,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:49:41,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:49:41,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085869336] [2024-06-27 23:49:41,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:49:41,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:49:41,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:49:41,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:49:41,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:49:42,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:49:42,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 471 transitions, 8642 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:49:42,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:49:42,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:49:42,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:49:43,474 INFO L124 PetriNetUnfolderBase]: 3676/5593 cut-off events. [2024-06-27 23:49:43,474 INFO L125 PetriNetUnfolderBase]: For 522405/522420 co-relation queries the response was YES. [2024-06-27 23:49:43,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53128 conditions, 5593 events. 3676/5593 cut-off events. For 522405/522420 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 29816 event pairs, 970 based on Foata normal form. 16/5608 useless extension candidates. Maximal degree in co-relation 52989. Up to 5056 conditions per place. [2024-06-27 23:49:43,546 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 353 selfloop transitions, 131 changer transitions 0/500 dead transitions. [2024-06-27 23:49:43,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 500 transitions, 9877 flow [2024-06-27 23:49:43,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:49:43,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:49:43,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 23:49:43,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-27 23:49:43,547 INFO L175 Difference]: Start difference. First operand has 273 places, 471 transitions, 8642 flow. Second operand 9 states and 167 transitions. [2024-06-27 23:49:43,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 500 transitions, 9877 flow [2024-06-27 23:49:44,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 500 transitions, 9732 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-27 23:49:44,755 INFO L231 Difference]: Finished difference. Result has 278 places, 475 transitions, 8829 flow [2024-06-27 23:49:44,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8497, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8829, PETRI_PLACES=278, PETRI_TRANSITIONS=475} [2024-06-27 23:49:44,756 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-27 23:49:44,756 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 475 transitions, 8829 flow [2024-06-27 23:49:44,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:49:44,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:49:44,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:49:44,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 23:49:44,756 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:49:44,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:49:44,757 INFO L85 PathProgramCache]: Analyzing trace with hash 353701610, now seen corresponding path program 1 times [2024-06-27 23:49:44,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:49:44,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877718909] [2024-06-27 23:49:44,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:49:44,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:49:44,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:49:46,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:49:46,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:49:46,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877718909] [2024-06-27 23:49:46,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877718909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:49:46,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:49:46,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:49:46,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846986838] [2024-06-27 23:49:46,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:49:46,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:49:46,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:49:46,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:49:46,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:49:46,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:49:46,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 475 transitions, 8829 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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) [2024-06-27 23:49:46,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:49:46,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:49:46,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:49:48,534 INFO L124 PetriNetUnfolderBase]: 3712/5642 cut-off events. [2024-06-27 23:49:48,535 INFO L125 PetriNetUnfolderBase]: For 546896/546916 co-relation queries the response was YES. [2024-06-27 23:49:48,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54298 conditions, 5642 events. 3712/5642 cut-off events. For 546896/546916 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 30033 event pairs, 996 based on Foata normal form. 22/5663 useless extension candidates. Maximal degree in co-relation 54157. Up to 5103 conditions per place. [2024-06-27 23:49:48,604 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 371 selfloop transitions, 124 changer transitions 0/511 dead transitions. [2024-06-27 23:49:48,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 511 transitions, 10566 flow [2024-06-27 23:49:48,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:49:48,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:49:48,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 23:49:48,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 23:49:48,605 INFO L175 Difference]: Start difference. First operand has 278 places, 475 transitions, 8829 flow. Second operand 8 states and 154 transitions. [2024-06-27 23:49:48,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 511 transitions, 10566 flow [2024-06-27 23:49:49,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 511 transitions, 10263 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 23:49:49,640 INFO L231 Difference]: Finished difference. Result has 279 places, 487 transitions, 9083 flow [2024-06-27 23:49:49,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8550, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9083, PETRI_PLACES=279, PETRI_TRANSITIONS=487} [2024-06-27 23:49:49,640 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-27 23:49:49,640 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 487 transitions, 9083 flow [2024-06-27 23:49:49,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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) [2024-06-27 23:49:49,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:49:49,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:49:49,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 23:49:49,641 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)] === [2024-06-27 23:49:49,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:49:49,641 INFO L85 PathProgramCache]: Analyzing trace with hash 740612652, now seen corresponding path program 2 times [2024-06-27 23:49:49,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:49:49,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300879084] [2024-06-27 23:49:49,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:49:49,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:49:49,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:49:52,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:49:52,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:49:52,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300879084] [2024-06-27 23:49:52,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300879084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:49:52,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:49:52,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 23:49:52,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108741377] [2024-06-27 23:49:52,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:49:52,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 23:49:52,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:49:52,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 23:49:52,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 23:49:52,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:49:52,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 487 transitions, 9083 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:49:52,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:49:52,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:49:52,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:49:54,001 INFO L124 PetriNetUnfolderBase]: 3753/5719 cut-off events. [2024-06-27 23:49:54,001 INFO L125 PetriNetUnfolderBase]: For 571637/571653 co-relation queries the response was YES. [2024-06-27 23:49:54,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54957 conditions, 5719 events. 3753/5719 cut-off events. For 571637/571653 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 30642 event pairs, 979 based on Foata normal form. 26/5744 useless extension candidates. Maximal degree in co-relation 54815. Up to 4779 conditions per place. [2024-06-27 23:49:54,076 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 336 selfloop transitions, 176 changer transitions 0/528 dead transitions. [2024-06-27 23:49:54,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 528 transitions, 10367 flow [2024-06-27 23:49:54,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:49:54,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:49:54,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 23:49:54,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-27 23:49:54,078 INFO L175 Difference]: Start difference. First operand has 279 places, 487 transitions, 9083 flow. Second operand 9 states and 178 transitions. [2024-06-27 23:49:54,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 528 transitions, 10367 flow [2024-06-27 23:49:55,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 528 transitions, 10075 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-27 23:49:55,412 INFO L231 Difference]: Finished difference. Result has 282 places, 488 transitions, 9195 flow [2024-06-27 23:49:55,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8791, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9195, PETRI_PLACES=282, PETRI_TRANSITIONS=488} [2024-06-27 23:49:55,412 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-27 23:49:55,412 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 488 transitions, 9195 flow [2024-06-27 23:49:55,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:49:55,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:49:55,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:49:55,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 23:49:55,413 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)] === [2024-06-27 23:49:55,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:49:55,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1256835258, now seen corresponding path program 3 times [2024-06-27 23:49:55,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:49:55,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433433711] [2024-06-27 23:49:55,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:49:55,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:49:55,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:49:57,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:49:57,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:49:57,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433433711] [2024-06-27 23:49:57,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433433711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:49:57,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:49:57,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:49:57,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578676705] [2024-06-27 23:49:57,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:49:57,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:49:57,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:49:57,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:49:57,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:49:58,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:49:58,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 488 transitions, 9195 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:49:58,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:49:58,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:49:58,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:49:59,564 INFO L124 PetriNetUnfolderBase]: 3794/5790 cut-off events. [2024-06-27 23:49:59,565 INFO L125 PetriNetUnfolderBase]: For 593240/593256 co-relation queries the response was YES. [2024-06-27 23:49:59,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55837 conditions, 5790 events. 3794/5790 cut-off events. For 593240/593256 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 31252 event pairs, 978 based on Foata normal form. 26/5815 useless extension candidates. Maximal degree in co-relation 55695. Up to 4518 conditions per place. [2024-06-27 23:49:59,646 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 306 selfloop transitions, 204 changer transitions 0/526 dead transitions. [2024-06-27 23:49:59,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 526 transitions, 10443 flow [2024-06-27 23:49:59,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:49:59,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:49:59,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-27 23:49:59,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-27 23:49:59,648 INFO L175 Difference]: Start difference. First operand has 282 places, 488 transitions, 9195 flow. Second operand 9 states and 179 transitions. [2024-06-27 23:49:59,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 526 transitions, 10443 flow [2024-06-27 23:50:01,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 526 transitions, 10121 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 23:50:01,029 INFO L231 Difference]: Finished difference. Result has 285 places, 489 transitions, 9335 flow [2024-06-27 23:50:01,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8873, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9335, PETRI_PLACES=285, PETRI_TRANSITIONS=489} [2024-06-27 23:50:01,030 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-27 23:50:01,030 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 489 transitions, 9335 flow [2024-06-27 23:50:01,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:01,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:01,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:01,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 23:50:01,031 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)] === [2024-06-27 23:50:01,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:01,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1084114728, now seen corresponding path program 4 times [2024-06-27 23:50:01,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:01,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477993918] [2024-06-27 23:50:01,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:01,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:03,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:03,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:03,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477993918] [2024-06-27 23:50:03,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477993918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:03,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:03,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:50:03,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627631973] [2024-06-27 23:50:03,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:03,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:50:03,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:03,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:50:03,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:50:03,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:50:03,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 489 transitions, 9335 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:03,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:03,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:50:03,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:05,282 INFO L124 PetriNetUnfolderBase]: 3835/5862 cut-off events. [2024-06-27 23:50:05,282 INFO L125 PetriNetUnfolderBase]: For 612277/612288 co-relation queries the response was YES. [2024-06-27 23:50:05,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56604 conditions, 5862 events. 3835/5862 cut-off events. For 612277/612288 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 31850 event pairs, 1036 based on Foata normal form. 22/5883 useless extension candidates. Maximal degree in co-relation 56461. Up to 4881 conditions per place. [2024-06-27 23:50:05,361 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 317 selfloop transitions, 199 changer transitions 0/532 dead transitions. [2024-06-27 23:50:05,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 532 transitions, 10637 flow [2024-06-27 23:50:05,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:50:05,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:50:05,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-27 23:50:05,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-27 23:50:05,363 INFO L175 Difference]: Start difference. First operand has 285 places, 489 transitions, 9335 flow. Second operand 9 states and 183 transitions. [2024-06-27 23:50:05,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 532 transitions, 10637 flow [2024-06-27 23:50:06,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 532 transitions, 10193 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-27 23:50:06,751 INFO L231 Difference]: Finished difference. Result has 287 places, 490 transitions, 9346 flow [2024-06-27 23:50:06,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8891, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9346, PETRI_PLACES=287, PETRI_TRANSITIONS=490} [2024-06-27 23:50:06,752 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-27 23:50:06,752 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 490 transitions, 9346 flow [2024-06-27 23:50:06,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:06,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:06,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:06,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 23:50:06,753 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:50:06,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:06,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1549820462, now seen corresponding path program 2 times [2024-06-27 23:50:06,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:06,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773454393] [2024-06-27 23:50:06,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:06,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:06,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:08,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:08,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:08,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773454393] [2024-06-27 23:50:08,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773454393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:08,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:08,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:50:08,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731392650] [2024-06-27 23:50:08,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:08,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:50:08,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:08,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:50:08,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:50:08,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:50:08,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 490 transitions, 9346 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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) [2024-06-27 23:50:08,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:08,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:50:08,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:10,198 INFO L124 PetriNetUnfolderBase]: 3821/5838 cut-off events. [2024-06-27 23:50:10,198 INFO L125 PetriNetUnfolderBase]: For 611418/611438 co-relation queries the response was YES. [2024-06-27 23:50:10,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56159 conditions, 5838 events. 3821/5838 cut-off events. For 611418/611438 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 31594 event pairs, 1036 based on Foata normal form. 22/5859 useless extension candidates. Maximal degree in co-relation 56015. Up to 5303 conditions per place. [2024-06-27 23:50:10,276 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 372 selfloop transitions, 122 changer transitions 0/510 dead transitions. [2024-06-27 23:50:10,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 510 transitions, 10662 flow [2024-06-27 23:50:10,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:50:10,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:50:10,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 23:50:10,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-27 23:50:10,277 INFO L175 Difference]: Start difference. First operand has 287 places, 490 transitions, 9346 flow. Second operand 8 states and 149 transitions. [2024-06-27 23:50:10,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 510 transitions, 10662 flow [2024-06-27 23:50:11,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 510 transitions, 10283 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-27 23:50:11,776 INFO L231 Difference]: Finished difference. Result has 289 places, 490 transitions, 9230 flow [2024-06-27 23:50:11,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8967, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9230, PETRI_PLACES=289, PETRI_TRANSITIONS=490} [2024-06-27 23:50:11,777 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-27 23:50:11,777 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 490 transitions, 9230 flow [2024-06-27 23:50:11,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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) [2024-06-27 23:50:11,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:11,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:11,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 23:50:11,778 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:50:11,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:11,778 INFO L85 PathProgramCache]: Analyzing trace with hash 285331785, now seen corresponding path program 2 times [2024-06-27 23:50:11,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:11,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941488874] [2024-06-27 23:50:11,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:11,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:11,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:13,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:13,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:13,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941488874] [2024-06-27 23:50:13,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941488874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:13,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:13,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:50:13,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527087615] [2024-06-27 23:50:13,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:13,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:50:13,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:13,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:50:13,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:50:13,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:50:13,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 490 transitions, 9230 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:13,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:13,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:50:13,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:15,754 INFO L124 PetriNetUnfolderBase]: 3970/6005 cut-off events. [2024-06-27 23:50:15,754 INFO L125 PetriNetUnfolderBase]: For 625036/625051 co-relation queries the response was YES. [2024-06-27 23:50:15,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57181 conditions, 6005 events. 3970/6005 cut-off events. For 625036/625051 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 32130 event pairs, 1102 based on Foata normal form. 16/6020 useless extension candidates. Maximal degree in co-relation 57036. Up to 5426 conditions per place. [2024-06-27 23:50:15,818 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 383 selfloop transitions, 145 changer transitions 0/531 dead transitions. [2024-06-27 23:50:15,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 531 transitions, 10985 flow [2024-06-27 23:50:15,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:50:15,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:50:15,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 23:50:15,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 23:50:15,819 INFO L175 Difference]: Start difference. First operand has 289 places, 490 transitions, 9230 flow. Second operand 9 states and 165 transitions. [2024-06-27 23:50:15,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 531 transitions, 10985 flow [2024-06-27 23:50:16,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 531 transitions, 10779 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 23:50:16,916 INFO L231 Difference]: Finished difference. Result has 293 places, 506 transitions, 9619 flow [2024-06-27 23:50:16,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9024, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9619, PETRI_PLACES=293, PETRI_TRANSITIONS=506} [2024-06-27 23:50:16,917 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-27 23:50:16,917 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 506 transitions, 9619 flow [2024-06-27 23:50:16,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:16,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:16,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:16,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 23:50:16,917 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:50:16,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:16,918 INFO L85 PathProgramCache]: Analyzing trace with hash 904095210, now seen corresponding path program 4 times [2024-06-27 23:50:16,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:16,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993912609] [2024-06-27 23:50:16,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:16,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:16,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:18,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:18,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:18,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993912609] [2024-06-27 23:50:18,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993912609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:18,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:18,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:50:18,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276094909] [2024-06-27 23:50:18,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:18,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:50:18,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:18,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:50:18,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:50:19,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:50:19,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 506 transitions, 9619 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:19,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:19,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:50:19,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:20,541 INFO L124 PetriNetUnfolderBase]: 3883/5923 cut-off events. [2024-06-27 23:50:20,541 INFO L125 PetriNetUnfolderBase]: For 645531/645546 co-relation queries the response was YES. [2024-06-27 23:50:20,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57368 conditions, 5923 events. 3883/5923 cut-off events. For 645531/645546 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 32104 event pairs, 1029 based on Foata normal form. 16/5938 useless extension candidates. Maximal degree in co-relation 57221. Up to 5343 conditions per place. [2024-06-27 23:50:20,623 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 364 selfloop transitions, 147 changer transitions 0/531 dead transitions. [2024-06-27 23:50:20,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 531 transitions, 10918 flow [2024-06-27 23:50:20,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:50:20,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:50:20,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 23:50:20,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-27 23:50:20,624 INFO L175 Difference]: Start difference. First operand has 293 places, 506 transitions, 9619 flow. Second operand 8 states and 157 transitions. [2024-06-27 23:50:20,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 531 transitions, 10918 flow [2024-06-27 23:50:21,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 531 transitions, 10732 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-27 23:50:21,842 INFO L231 Difference]: Finished difference. Result has 297 places, 510 transitions, 9812 flow [2024-06-27 23:50:21,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9433, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9812, PETRI_PLACES=297, PETRI_TRANSITIONS=510} [2024-06-27 23:50:21,843 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-27 23:50:21,843 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 510 transitions, 9812 flow [2024-06-27 23:50:21,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:21,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:21,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:21,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 23:50:21,843 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:50:21,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:21,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1429032191, now seen corresponding path program 3 times [2024-06-27 23:50:21,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:21,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569316487] [2024-06-27 23:50:21,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:21,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:21,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:23,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:23,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:23,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569316487] [2024-06-27 23:50:23,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569316487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:23,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:23,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:50:23,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845834627] [2024-06-27 23:50:23,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:23,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:50:23,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:23,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:50:23,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:50:23,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:50:23,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 510 transitions, 9812 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:23,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:23,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:50:23,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:25,828 INFO L124 PetriNetUnfolderBase]: 3992/6038 cut-off events. [2024-06-27 23:50:25,829 INFO L125 PetriNetUnfolderBase]: For 663687/663707 co-relation queries the response was YES. [2024-06-27 23:50:25,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58341 conditions, 6038 events. 3992/6038 cut-off events. For 663687/663707 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 32287 event pairs, 1092 based on Foata normal form. 20/6057 useless extension candidates. Maximal degree in co-relation 58193. Up to 5453 conditions per place. [2024-06-27 23:50:25,900 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 391 selfloop transitions, 142 changer transitions 0/536 dead transitions. [2024-06-27 23:50:25,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 536 transitions, 11427 flow [2024-06-27 23:50:25,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:50:25,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:50:25,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 23:50:25,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-27 23:50:25,901 INFO L175 Difference]: Start difference. First operand has 297 places, 510 transitions, 9812 flow. Second operand 9 states and 160 transitions. [2024-06-27 23:50:25,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 536 transitions, 11427 flow [2024-06-27 23:50:27,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 536 transitions, 11169 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 23:50:27,021 INFO L231 Difference]: Finished difference. Result has 301 places, 514 transitions, 9923 flow [2024-06-27 23:50:27,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9560, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9923, PETRI_PLACES=301, PETRI_TRANSITIONS=514} [2024-06-27 23:50:27,021 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-27 23:50:27,022 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 514 transitions, 9923 flow [2024-06-27 23:50:27,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:27,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:27,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:27,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 23:50:27,022 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:50:27,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:27,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1412050980, now seen corresponding path program 5 times [2024-06-27 23:50:27,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:27,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002220702] [2024-06-27 23:50:27,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:27,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:27,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:29,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:29,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:29,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002220702] [2024-06-27 23:50:29,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002220702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:29,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:29,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:50:29,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338087846] [2024-06-27 23:50:29,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:29,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:50:29,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:29,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:50:29,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:50:29,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:50:29,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 514 transitions, 9923 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:29,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:29,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:50:29,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:30,811 INFO L124 PetriNetUnfolderBase]: 3907/5958 cut-off events. [2024-06-27 23:50:30,811 INFO L125 PetriNetUnfolderBase]: For 667496/667516 co-relation queries the response was YES. [2024-06-27 23:50:30,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58026 conditions, 5958 events. 3907/5958 cut-off events. For 667496/667516 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 32282 event pairs, 1037 based on Foata normal form. 20/5977 useless extension candidates. Maximal degree in co-relation 57877. Up to 5382 conditions per place. [2024-06-27 23:50:30,893 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 387 selfloop transitions, 127 changer transitions 0/535 dead transitions. [2024-06-27 23:50:30,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 535 transitions, 11342 flow [2024-06-27 23:50:30,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:50:30,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:50:30,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 23:50:30,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 23:50:30,894 INFO L175 Difference]: Start difference. First operand has 301 places, 514 transitions, 9923 flow. Second operand 8 states and 152 transitions. [2024-06-27 23:50:30,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 535 transitions, 11342 flow [2024-06-27 23:50:32,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 535 transitions, 11034 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 23:50:32,264 INFO L231 Difference]: Finished difference. Result has 303 places, 518 transitions, 9947 flow [2024-06-27 23:50:32,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9615, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9947, PETRI_PLACES=303, PETRI_TRANSITIONS=518} [2024-06-27 23:50:32,265 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-27 23:50:32,265 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 518 transitions, 9947 flow [2024-06-27 23:50:32,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:32,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:32,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:32,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 23:50:32,266 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:50:32,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:32,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1412062884, now seen corresponding path program 1 times [2024-06-27 23:50:32,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:32,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895272783] [2024-06-27 23:50:32,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:32,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:32,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:34,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:34,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:34,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895272783] [2024-06-27 23:50:34,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895272783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:34,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:34,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:50:34,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562216101] [2024-06-27 23:50:34,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:34,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:50:34,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:34,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:50:34,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:50:34,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:50:34,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 518 transitions, 9947 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:34,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:34,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:50:34,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:36,274 INFO L124 PetriNetUnfolderBase]: 4009/6060 cut-off events. [2024-06-27 23:50:36,274 INFO L125 PetriNetUnfolderBase]: For 677709/677711 co-relation queries the response was YES. [2024-06-27 23:50:36,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58705 conditions, 6060 events. 4009/6060 cut-off events. For 677709/677711 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 32419 event pairs, 1306 based on Foata normal form. 3/6062 useless extension candidates. Maximal degree in co-relation 58555. Up to 5935 conditions per place. [2024-06-27 23:50:36,355 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 493 selfloop transitions, 51 changer transitions 0/547 dead transitions. [2024-06-27 23:50:36,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 547 transitions, 11373 flow [2024-06-27 23:50:36,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:50:36,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:50:36,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 23:50:36,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-27 23:50:36,355 INFO L175 Difference]: Start difference. First operand has 303 places, 518 transitions, 9947 flow. Second operand 9 states and 149 transitions. [2024-06-27 23:50:36,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 547 transitions, 11373 flow [2024-06-27 23:50:37,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 547 transitions, 11147 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 23:50:37,904 INFO L231 Difference]: Finished difference. Result has 308 places, 527 transitions, 9981 flow [2024-06-27 23:50:37,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9721, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9981, PETRI_PLACES=308, PETRI_TRANSITIONS=527} [2024-06-27 23:50:37,905 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-27 23:50:37,905 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 527 transitions, 9981 flow [2024-06-27 23:50:37,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:37,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:37,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:37,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 23:50:37,906 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:50:37,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:37,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1412062481, now seen corresponding path program 4 times [2024-06-27 23:50:37,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:37,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462302779] [2024-06-27 23:50:37,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:37,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:37,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:40,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:40,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:40,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462302779] [2024-06-27 23:50:40,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462302779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:40,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:40,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:50:40,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98236002] [2024-06-27 23:50:40,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:40,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:50:40,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:40,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:50:40,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:50:40,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:50:40,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 527 transitions, 9981 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:40,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:40,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:50:40,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:41,908 INFO L124 PetriNetUnfolderBase]: 4005/6057 cut-off events. [2024-06-27 23:50:41,908 INFO L125 PetriNetUnfolderBase]: For 695580/695600 co-relation queries the response was YES. [2024-06-27 23:50:41,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58791 conditions, 6057 events. 4005/6057 cut-off events. For 695580/695600 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 32395 event pairs, 1091 based on Foata normal form. 20/6076 useless extension candidates. Maximal degree in co-relation 58639. Up to 5475 conditions per place. [2024-06-27 23:50:41,995 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 402 selfloop transitions, 144 changer transitions 0/549 dead transitions. [2024-06-27 23:50:41,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 549 transitions, 11563 flow [2024-06-27 23:50:41,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:50:41,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:50:41,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 23:50:41,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 23:50:41,997 INFO L175 Difference]: Start difference. First operand has 308 places, 527 transitions, 9981 flow. Second operand 9 states and 159 transitions. [2024-06-27 23:50:41,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 549 transitions, 11563 flow [2024-06-27 23:50:43,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 549 transitions, 11461 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-27 23:50:43,704 INFO L231 Difference]: Finished difference. Result has 313 places, 527 transitions, 10176 flow [2024-06-27 23:50:43,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9879, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10176, PETRI_PLACES=313, PETRI_TRANSITIONS=527} [2024-06-27 23:50:43,705 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-27 23:50:43,705 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 527 transitions, 10176 flow [2024-06-27 23:50:43,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:43,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:43,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:43,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 23:50:43,705 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:50:43,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:43,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1816942354, now seen corresponding path program 3 times [2024-06-27 23:50:43,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:43,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204466538] [2024-06-27 23:50:43,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:43,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:43,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:45,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:45,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:45,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204466538] [2024-06-27 23:50:45,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204466538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:45,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:45,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:50:45,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779059575] [2024-06-27 23:50:45,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:45,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:50:45,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:45,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:50:45,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:50:45,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:50:45,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 527 transitions, 10176 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) [2024-06-27 23:50:45,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:45,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:50:45,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:46,881 INFO L124 PetriNetUnfolderBase]: 4033/6110 cut-off events. [2024-06-27 23:50:46,881 INFO L125 PetriNetUnfolderBase]: For 729012/729016 co-relation queries the response was YES. [2024-06-27 23:50:46,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60018 conditions, 6110 events. 4033/6110 cut-off events. For 729012/729016 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 32913 event pairs, 1541 based on Foata normal form. 8/6117 useless extension candidates. Maximal degree in co-relation 59863. Up to 5781 conditions per place. [2024-06-27 23:50:46,954 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 449 selfloop transitions, 105 changer transitions 0/557 dead transitions. [2024-06-27 23:50:46,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 557 transitions, 11964 flow [2024-06-27 23:50:46,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:50:46,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:50:46,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 23:50:46,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 23:50:46,955 INFO L175 Difference]: Start difference. First operand has 313 places, 527 transitions, 10176 flow. Second operand 7 states and 126 transitions. [2024-06-27 23:50:46,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 557 transitions, 11964 flow [2024-06-27 23:50:48,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 557 transitions, 11662 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 23:50:48,400 INFO L231 Difference]: Finished difference. Result has 314 places, 540 transitions, 10468 flow [2024-06-27 23:50:48,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9888, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10468, PETRI_PLACES=314, PETRI_TRANSITIONS=540} [2024-06-27 23:50:48,401 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-27 23:50:48,401 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 540 transitions, 10468 flow [2024-06-27 23:50:48,401 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) [2024-06-27 23:50:48,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:48,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:48,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 23:50:48,401 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:50:48,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:48,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1811228434, now seen corresponding path program 4 times [2024-06-27 23:50:48,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:48,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026832045] [2024-06-27 23:50:48,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:48,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:48,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:50,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:50,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:50,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026832045] [2024-06-27 23:50:50,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026832045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:50,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:50,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:50:50,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045844544] [2024-06-27 23:50:50,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:50,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:50:50,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:50,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:50:50,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:50:50,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:50:50,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 540 transitions, 10468 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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) [2024-06-27 23:50:50,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:50,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:50:50,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:51,789 INFO L124 PetriNetUnfolderBase]: 3927/6001 cut-off events. [2024-06-27 23:50:51,789 INFO L125 PetriNetUnfolderBase]: For 737003/737007 co-relation queries the response was YES. [2024-06-27 23:50:51,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59552 conditions, 6001 events. 3927/6001 cut-off events. For 737003/737007 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 32742 event pairs, 1476 based on Foata normal form. 6/6006 useless extension candidates. Maximal degree in co-relation 59395. Up to 5530 conditions per place. [2024-06-27 23:50:51,879 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 434 selfloop transitions, 99 changer transitions 0/554 dead transitions. [2024-06-27 23:50:51,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 554 transitions, 11864 flow [2024-06-27 23:50:51,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:50:51,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:50:51,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-27 23:50:51,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-27 23:50:51,880 INFO L175 Difference]: Start difference. First operand has 314 places, 540 transitions, 10468 flow. Second operand 7 states and 129 transitions. [2024-06-27 23:50:51,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 554 transitions, 11864 flow [2024-06-27 23:50:53,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 554 transitions, 11720 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 23:50:53,716 INFO L231 Difference]: Finished difference. Result has 318 places, 540 transitions, 10539 flow [2024-06-27 23:50:53,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10324, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10539, PETRI_PLACES=318, PETRI_TRANSITIONS=540} [2024-06-27 23:50:53,717 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-27 23:50:53,717 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 540 transitions, 10539 flow [2024-06-27 23:50:53,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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) [2024-06-27 23:50:53,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:53,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:53,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 23:50:53,718 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:50:53,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:53,718 INFO L85 PathProgramCache]: Analyzing trace with hash -931902133, now seen corresponding path program 5 times [2024-06-27 23:50:53,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:53,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168901687] [2024-06-27 23:50:53,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:53,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:53,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:55,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:55,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:55,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168901687] [2024-06-27 23:50:55,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168901687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:55,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:55,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:50:55,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590214611] [2024-06-27 23:50:55,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:55,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:50:55,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:55,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:50:55,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:50:55,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:50:55,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 540 transitions, 10539 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:55,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:55,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:50:55,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:57,189 INFO L124 PetriNetUnfolderBase]: 4090/6190 cut-off events. [2024-06-27 23:50:57,190 INFO L125 PetriNetUnfolderBase]: For 760217/760221 co-relation queries the response was YES. [2024-06-27 23:50:57,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60939 conditions, 6190 events. 4090/6190 cut-off events. For 760217/760221 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 33420 event pairs, 1548 based on Foata normal form. 6/6195 useless extension candidates. Maximal degree in co-relation 60781. Up to 5713 conditions per place. [2024-06-27 23:50:57,282 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 435 selfloop transitions, 143 changer transitions 0/581 dead transitions. [2024-06-27 23:50:57,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 581 transitions, 12298 flow [2024-06-27 23:50:57,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:50:57,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:50:57,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 23:50:57,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-27 23:50:57,283 INFO L175 Difference]: Start difference. First operand has 318 places, 540 transitions, 10539 flow. Second operand 8 states and 143 transitions. [2024-06-27 23:50:57,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 581 transitions, 12298 flow [2024-06-27 23:50:59,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 581 transitions, 12188 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 23:50:59,196 INFO L231 Difference]: Finished difference. Result has 325 places, 563 transitions, 11171 flow [2024-06-27 23:50:59,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10429, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11171, PETRI_PLACES=325, PETRI_TRANSITIONS=563} [2024-06-27 23:50:59,197 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-27 23:50:59,197 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 563 transitions, 11171 flow [2024-06-27 23:50:59,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:59,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:59,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:59,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 23:50:59,197 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:50:59,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:59,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1811220498, now seen corresponding path program 2 times [2024-06-27 23:50:59,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:59,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771370919] [2024-06-27 23:50:59,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:59,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:59,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:00,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:00,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:00,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771370919] [2024-06-27 23:51:00,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771370919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:00,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:00,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:51:00,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890717410] [2024-06-27 23:51:00,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:00,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:51:00,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:00,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:51:00,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:51:00,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:51:00,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 563 transitions, 11171 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:00,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:00,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:51:00,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:02,501 INFO L124 PetriNetUnfolderBase]: 4100/6197 cut-off events. [2024-06-27 23:51:02,501 INFO L125 PetriNetUnfolderBase]: For 781415/781415 co-relation queries the response was YES. [2024-06-27 23:51:02,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61909 conditions, 6197 events. 4100/6197 cut-off events. For 781415/781415 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 33324 event pairs, 1578 based on Foata normal form. 1/6197 useless extension candidates. Maximal degree in co-relation 61748. Up to 6079 conditions per place. [2024-06-27 23:51:02,596 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 534 selfloop transitions, 46 changer transitions 0/583 dead transitions. [2024-06-27 23:51:02,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 583 transitions, 12596 flow [2024-06-27 23:51:02,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:51:02,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:51:02,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 23:51:02,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-27 23:51:02,597 INFO L175 Difference]: Start difference. First operand has 325 places, 563 transitions, 11171 flow. Second operand 8 states and 132 transitions. [2024-06-27 23:51:02,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 583 transitions, 12596 flow [2024-06-27 23:51:04,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 583 transitions, 12380 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 23:51:04,840 INFO L231 Difference]: Finished difference. Result has 328 places, 569 transitions, 11136 flow [2024-06-27 23:51:04,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10955, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11136, PETRI_PLACES=328, PETRI_TRANSITIONS=569} [2024-06-27 23:51:04,841 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-27 23:51:04,841 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 569 transitions, 11136 flow [2024-06-27 23:51:04,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:04,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:04,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:04,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 23:51:04,841 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:04,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:04,842 INFO L85 PathProgramCache]: Analyzing trace with hash 711013969, now seen corresponding path program 6 times [2024-06-27 23:51:04,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:04,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728694409] [2024-06-27 23:51:04,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:04,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:04,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:06,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:06,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:06,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728694409] [2024-06-27 23:51:06,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728694409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:06,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:06,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:51:06,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109201716] [2024-06-27 23:51:06,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:06,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:51:06,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:06,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:51:06,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:51:06,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:51:06,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 569 transitions, 11136 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:06,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:06,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:51:06,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:08,461 INFO L124 PetriNetUnfolderBase]: 4144/6264 cut-off events. [2024-06-27 23:51:08,461 INFO L125 PetriNetUnfolderBase]: For 810023/810027 co-relation queries the response was YES. [2024-06-27 23:51:08,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62719 conditions, 6264 events. 4144/6264 cut-off events. For 810023/810027 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 33832 event pairs, 1547 based on Foata normal form. 6/6269 useless extension candidates. Maximal degree in co-relation 62557. Up to 5770 conditions per place. [2024-06-27 23:51:08,545 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 458 selfloop transitions, 136 changer transitions 0/597 dead transitions. [2024-06-27 23:51:08,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 597 transitions, 13063 flow [2024-06-27 23:51:08,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:51:08,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:51:08,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-27 23:51:08,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-27 23:51:08,546 INFO L175 Difference]: Start difference. First operand has 328 places, 569 transitions, 11136 flow. Second operand 9 states and 148 transitions. [2024-06-27 23:51:08,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 597 transitions, 13063 flow [2024-06-27 23:51:10,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 597 transitions, 12972 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-27 23:51:10,680 INFO L231 Difference]: Finished difference. Result has 335 places, 580 transitions, 11592 flow [2024-06-27 23:51:10,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11045, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11592, PETRI_PLACES=335, PETRI_TRANSITIONS=580} [2024-06-27 23:51:10,681 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-27 23:51:10,681 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 580 transitions, 11592 flow [2024-06-27 23:51:10,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:10,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:10,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:10,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 23:51:10,681 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:10,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:10,682 INFO L85 PathProgramCache]: Analyzing trace with hash 711002809, now seen corresponding path program 7 times [2024-06-27 23:51:10,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:10,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315580783] [2024-06-27 23:51:10,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:10,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:10,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:12,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:12,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:12,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315580783] [2024-06-27 23:51:12,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315580783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:12,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:12,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:51:12,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230016052] [2024-06-27 23:51:12,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:12,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:51:12,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:12,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:51:12,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:51:12,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:51:12,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 580 transitions, 11592 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:12,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:12,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:51:12,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:14,100 INFO L124 PetriNetUnfolderBase]: 4140/6259 cut-off events. [2024-06-27 23:51:14,101 INFO L125 PetriNetUnfolderBase]: For 826712/826716 co-relation queries the response was YES. [2024-06-27 23:51:14,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63277 conditions, 6259 events. 4140/6259 cut-off events. For 826712/826716 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 33764 event pairs, 1547 based on Foata normal form. 6/6264 useless extension candidates. Maximal degree in co-relation 63112. Up to 5768 conditions per place. [2024-06-27 23:51:14,190 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 456 selfloop transitions, 137 changer transitions 0/596 dead transitions. [2024-06-27 23:51:14,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 596 transitions, 13159 flow [2024-06-27 23:51:14,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:51:14,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:51:14,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-27 23:51:14,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-27 23:51:14,198 INFO L175 Difference]: Start difference. First operand has 335 places, 580 transitions, 11592 flow. Second operand 9 states and 148 transitions. [2024-06-27 23:51:14,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 596 transitions, 13159 flow [2024-06-27 23:51:16,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 596 transitions, 12921 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-27 23:51:16,425 INFO L231 Difference]: Finished difference. Result has 339 places, 581 transitions, 11675 flow [2024-06-27 23:51:16,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11354, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11675, PETRI_PLACES=339, PETRI_TRANSITIONS=581} [2024-06-27 23:51:16,426 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 296 predicate places. [2024-06-27 23:51:16,426 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 581 transitions, 11675 flow [2024-06-27 23:51:16,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:16,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:16,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:16,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 23:51:16,426 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:16,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:16,427 INFO L85 PathProgramCache]: Analyzing trace with hash -780181940, now seen corresponding path program 5 times [2024-06-27 23:51:16,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:16,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046123134] [2024-06-27 23:51:16,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:16,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:16,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:17,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:17,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:17,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046123134] [2024-06-27 23:51:17,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046123134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:17,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:17,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:51:17,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394005925] [2024-06-27 23:51:17,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:17,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:51:17,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:17,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:51:17,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:51:17,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:51:17,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 581 transitions, 11675 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) [2024-06-27 23:51:17,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:17,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:51:17,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:19,468 INFO L124 PetriNetUnfolderBase]: 4124/6230 cut-off events. [2024-06-27 23:51:19,468 INFO L125 PetriNetUnfolderBase]: For 841174/841174 co-relation queries the response was YES. [2024-06-27 23:51:19,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63113 conditions, 6230 events. 4124/6230 cut-off events. For 841174/841174 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 33533 event pairs, 1579 based on Foata normal form. 2/6231 useless extension candidates. Maximal degree in co-relation 62947. Up to 6114 conditions per place. [2024-06-27 23:51:19,562 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 554 selfloop transitions, 39 changer transitions 0/596 dead transitions. [2024-06-27 23:51:19,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 596 transitions, 13084 flow [2024-06-27 23:51:19,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:51:19,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:51:19,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 23:51:19,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 23:51:19,563 INFO L175 Difference]: Start difference. First operand has 339 places, 581 transitions, 11675 flow. Second operand 7 states and 119 transitions. [2024-06-27 23:51:19,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 596 transitions, 13084 flow [2024-06-27 23:51:21,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 596 transitions, 12815 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 23:51:21,814 INFO L231 Difference]: Finished difference. Result has 340 places, 581 transitions, 11495 flow [2024-06-27 23:51:21,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11406, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11495, PETRI_PLACES=340, PETRI_TRANSITIONS=581} [2024-06-27 23:51:21,815 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-27 23:51:21,815 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 581 transitions, 11495 flow [2024-06-27 23:51:21,815 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) [2024-06-27 23:51:21,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:21,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:21,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 23:51:21,815 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:21,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:21,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1596482600, now seen corresponding path program 6 times [2024-06-27 23:51:21,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:21,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473369831] [2024-06-27 23:51:21,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:21,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:21,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:23,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:23,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:23,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473369831] [2024-06-27 23:51:23,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473369831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:23,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:23,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:51:23,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713522167] [2024-06-27 23:51:23,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:23,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:51:23,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:23,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:51:23,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:51:23,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:51:23,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 581 transitions, 11495 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) [2024-06-27 23:51:23,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:23,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:51:23,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:24,878 INFO L124 PetriNetUnfolderBase]: 4129/6236 cut-off events. [2024-06-27 23:51:24,878 INFO L125 PetriNetUnfolderBase]: For 855670/855670 co-relation queries the response was YES. [2024-06-27 23:51:24,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63096 conditions, 6236 events. 4129/6236 cut-off events. For 855670/855670 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 33574 event pairs, 1584 based on Foata normal form. 1/6236 useless extension candidates. Maximal degree in co-relation 62929. Up to 6148 conditions per place. [2024-06-27 23:51:24,967 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 565 selfloop transitions, 27 changer transitions 0/595 dead transitions. [2024-06-27 23:51:24,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 595 transitions, 12804 flow [2024-06-27 23:51:24,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:51:24,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:51:24,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-27 23:51:24,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2024-06-27 23:51:24,968 INFO L175 Difference]: Start difference. First operand has 340 places, 581 transitions, 11495 flow. Second operand 7 states and 114 transitions. [2024-06-27 23:51:24,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 595 transitions, 12804 flow [2024-06-27 23:51:27,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 595 transitions, 12437 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-27 23:51:27,481 INFO L231 Difference]: Finished difference. Result has 338 places, 584 transitions, 11282 flow [2024-06-27 23:51:27,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11142, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11282, PETRI_PLACES=338, PETRI_TRANSITIONS=584} [2024-06-27 23:51:27,482 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2024-06-27 23:51:27,482 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 584 transitions, 11282 flow [2024-06-27 23:51:27,482 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) [2024-06-27 23:51:27,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:27,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:27,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 23:51:27,482 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:27,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:27,483 INFO L85 PathProgramCache]: Analyzing trace with hash -2064611312, now seen corresponding path program 7 times [2024-06-27 23:51:27,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:27,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457550866] [2024-06-27 23:51:27,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:27,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:27,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:28,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:28,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:28,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457550866] [2024-06-27 23:51:28,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457550866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:28,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:28,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:51:28,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092894615] [2024-06-27 23:51:28,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:28,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:51:28,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:28,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:51:28,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:51:28,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:51:28,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 584 transitions, 11282 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) [2024-06-27 23:51:28,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:28,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:51:28,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:30,574 INFO L124 PetriNetUnfolderBase]: 4123/6228 cut-off events. [2024-06-27 23:51:30,575 INFO L125 PetriNetUnfolderBase]: For 869199/869203 co-relation queries the response was YES. [2024-06-27 23:51:30,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62803 conditions, 6228 events. 4123/6228 cut-off events. For 869199/869203 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 33500 event pairs, 1577 based on Foata normal form. 6/6233 useless extension candidates. Maximal degree in co-relation 62636. Up to 6116 conditions per place. [2024-06-27 23:51:30,657 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 554 selfloop transitions, 37 changer transitions 0/594 dead transitions. [2024-06-27 23:51:30,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 594 transitions, 12654 flow [2024-06-27 23:51:30,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:51:30,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:51:30,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-27 23:51:30,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-27 23:51:30,657 INFO L175 Difference]: Start difference. First operand has 338 places, 584 transitions, 11282 flow. Second operand 7 states and 115 transitions. [2024-06-27 23:51:30,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 594 transitions, 12654 flow [2024-06-27 23:51:32,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 594 transitions, 12573 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 23:51:32,615 INFO L231 Difference]: Finished difference. Result has 340 places, 584 transitions, 11283 flow [2024-06-27 23:51:32,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11201, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11283, PETRI_PLACES=340, PETRI_TRANSITIONS=584} [2024-06-27 23:51:32,616 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-27 23:51:32,616 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 584 transitions, 11283 flow [2024-06-27 23:51:32,616 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) [2024-06-27 23:51:32,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:32,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:32,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 23:51:32,617 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)] === [2024-06-27 23:51:32,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:32,617 INFO L85 PathProgramCache]: Analyzing trace with hash -465514160, now seen corresponding path program 8 times [2024-06-27 23:51:32,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:32,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503784560] [2024-06-27 23:51:32,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:32,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:32,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:33,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:33,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:33,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503784560] [2024-06-27 23:51:33,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503784560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:33,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:33,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:51:33,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152104647] [2024-06-27 23:51:33,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:33,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:51:33,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:33,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:51:33,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:51:34,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:51:34,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 584 transitions, 11283 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) [2024-06-27 23:51:34,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:34,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:51:34,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:35,655 INFO L124 PetriNetUnfolderBase]: 4118/6221 cut-off events. [2024-06-27 23:51:35,655 INFO L125 PetriNetUnfolderBase]: For 882679/882683 co-relation queries the response was YES. [2024-06-27 23:51:35,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62910 conditions, 6221 events. 4118/6221 cut-off events. For 882679/882683 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 33477 event pairs, 1577 based on Foata normal form. 5/6225 useless extension candidates. Maximal degree in co-relation 62742. Up to 6135 conditions per place. [2024-06-27 23:51:35,750 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 563 selfloop transitions, 27 changer transitions 0/593 dead transitions. [2024-06-27 23:51:35,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 593 transitions, 12495 flow [2024-06-27 23:51:35,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:51:35,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:51:35,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-27 23:51:35,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-27 23:51:35,751 INFO L175 Difference]: Start difference. First operand has 340 places, 584 transitions, 11283 flow. Second operand 7 states and 111 transitions. [2024-06-27 23:51:35,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 593 transitions, 12495 flow [2024-06-27 23:51:38,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 593 transitions, 12390 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 23:51:38,106 INFO L231 Difference]: Finished difference. Result has 342 places, 584 transitions, 11238 flow [2024-06-27 23:51:38,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11178, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11238, PETRI_PLACES=342, PETRI_TRANSITIONS=584} [2024-06-27 23:51:38,106 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 299 predicate places. [2024-06-27 23:51:38,106 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 584 transitions, 11238 flow [2024-06-27 23:51:38,107 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) [2024-06-27 23:51:38,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:38,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:38,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 23:51:38,107 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)] === [2024-06-27 23:51:38,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:38,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1218401662, now seen corresponding path program 5 times [2024-06-27 23:51:38,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:38,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070079766] [2024-06-27 23:51:38,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:38,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:38,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:40,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:40,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:40,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070079766] [2024-06-27 23:51:40,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070079766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:40,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:40,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:51:40,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257919392] [2024-06-27 23:51:40,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:40,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:51:40,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:40,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:51:40,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:51:40,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:51:40,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 584 transitions, 11238 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:40,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:40,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:51:40,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:42,312 INFO L124 PetriNetUnfolderBase]: 4111/6283 cut-off events. [2024-06-27 23:51:42,312 INFO L125 PetriNetUnfolderBase]: For 930704/930704 co-relation queries the response was YES. [2024-06-27 23:51:42,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63425 conditions, 6283 events. 4111/6283 cut-off events. For 930704/930704 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 34714 event pairs, 1476 based on Foata normal form. 12/6294 useless extension candidates. Maximal degree in co-relation 63256. Up to 5588 conditions per place. [2024-06-27 23:51:42,407 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 517 selfloop transitions, 83 changer transitions 0/630 dead transitions. [2024-06-27 23:51:42,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 630 transitions, 12872 flow [2024-06-27 23:51:42,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:51:42,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:51:42,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 23:51:42,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-27 23:51:42,408 INFO L175 Difference]: Start difference. First operand has 342 places, 584 transitions, 11238 flow. Second operand 9 states and 160 transitions. [2024-06-27 23:51:42,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 630 transitions, 12872 flow [2024-06-27 23:51:44,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 630 transitions, 12784 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 23:51:44,955 INFO L231 Difference]: Finished difference. Result has 347 places, 593 transitions, 11516 flow [2024-06-27 23:51:44,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11150, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11516, PETRI_PLACES=347, PETRI_TRANSITIONS=593} [2024-06-27 23:51:44,956 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 304 predicate places. [2024-06-27 23:51:44,956 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 593 transitions, 11516 flow [2024-06-27 23:51:44,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:44,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:44,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:44,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 23:51:44,957 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)] === [2024-06-27 23:51:44,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:44,958 INFO L85 PathProgramCache]: Analyzing trace with hash -327130798, now seen corresponding path program 6 times [2024-06-27 23:51:44,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:44,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216251134] [2024-06-27 23:51:44,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:44,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:47,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:47,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:47,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216251134] [2024-06-27 23:51:47,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216251134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:47,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:47,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:51:47,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459612865] [2024-06-27 23:51:47,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:47,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:51:47,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:47,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:51:47,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:51:47,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:51:47,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 593 transitions, 11516 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:47,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:47,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:51:47,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:49,212 INFO L124 PetriNetUnfolderBase]: 4152/6354 cut-off events. [2024-06-27 23:51:49,213 INFO L125 PetriNetUnfolderBase]: For 957098/957098 co-relation queries the response was YES. [2024-06-27 23:51:49,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64892 conditions, 6354 events. 4152/6354 cut-off events. For 957098/957098 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 35246 event pairs, 1489 based on Foata normal form. 12/6365 useless extension candidates. Maximal degree in co-relation 64719. Up to 5700 conditions per place. [2024-06-27 23:51:49,308 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 501 selfloop transitions, 103 changer transitions 0/634 dead transitions. [2024-06-27 23:51:49,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 634 transitions, 13141 flow [2024-06-27 23:51:49,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:51:49,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:51:49,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 23:51:49,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 23:51:49,310 INFO L175 Difference]: Start difference. First operand has 347 places, 593 transitions, 11516 flow. Second operand 8 states and 154 transitions. [2024-06-27 23:51:49,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 634 transitions, 13141 flow [2024-06-27 23:51:51,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 634 transitions, 12994 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-27 23:51:51,736 INFO L231 Difference]: Finished difference. Result has 352 places, 605 transitions, 11931 flow [2024-06-27 23:51:51,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11371, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11931, PETRI_PLACES=352, PETRI_TRANSITIONS=605} [2024-06-27 23:51:51,737 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-27 23:51:51,737 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 605 transitions, 11931 flow [2024-06-27 23:51:51,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:51,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:51,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:51,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 23:51:51,737 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)] === [2024-06-27 23:51:51,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:51,738 INFO L85 PathProgramCache]: Analyzing trace with hash -41800288, now seen corresponding path program 7 times [2024-06-27 23:51:51,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:51,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784551239] [2024-06-27 23:51:51,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:51,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:51,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:53,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:53,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:53,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784551239] [2024-06-27 23:51:53,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784551239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:53,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:53,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:51:53,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079169681] [2024-06-27 23:51:53,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:53,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:51:53,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:53,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:51:53,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:51:54,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:51:54,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 605 transitions, 11931 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:54,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:54,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:51:54,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:55,946 INFO L124 PetriNetUnfolderBase]: 4193/6414 cut-off events. [2024-06-27 23:51:55,946 INFO L125 PetriNetUnfolderBase]: For 981819/981823 co-relation queries the response was YES. [2024-06-27 23:51:56,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65725 conditions, 6414 events. 4193/6414 cut-off events. For 981819/981823 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 35582 event pairs, 1509 based on Foata normal form. 16/6429 useless extension candidates. Maximal degree in co-relation 65550. Up to 6004 conditions per place. [2024-06-27 23:51:56,065 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 584 selfloop transitions, 24 changer transitions 0/638 dead transitions. [2024-06-27 23:51:56,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 638 transitions, 13343 flow [2024-06-27 23:51:56,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:51:56,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:51:56,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-27 23:51:56,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-27 23:51:56,067 INFO L175 Difference]: Start difference. First operand has 352 places, 605 transitions, 11931 flow. Second operand 10 states and 169 transitions. [2024-06-27 23:51:56,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 638 transitions, 13343 flow [2024-06-27 23:51:58,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 638 transitions, 13140 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 23:51:58,621 INFO L231 Difference]: Finished difference. Result has 358 places, 606 transitions, 11836 flow [2024-06-27 23:51:58,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11728, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11836, PETRI_PLACES=358, PETRI_TRANSITIONS=606} [2024-06-27 23:51:58,622 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-27 23:51:58,622 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 606 transitions, 11836 flow [2024-06-27 23:51:58,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:58,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:58,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:58,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 23:51:58,623 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)] === [2024-06-27 23:51:58,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:58,624 INFO L85 PathProgramCache]: Analyzing trace with hash 311287984, now seen corresponding path program 8 times [2024-06-27 23:51:58,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:58,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118735501] [2024-06-27 23:51:58,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:58,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:58,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:00,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:52:00,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:00,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118735501] [2024-06-27 23:52:00,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118735501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:00,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:00,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:52:00,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048595999] [2024-06-27 23:52:00,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:00,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:52:00,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:00,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:52:00,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:52:00,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:52:00,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 606 transitions, 11836 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:00,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:00,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:52:00,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:52:03,023 INFO L124 PetriNetUnfolderBase]: 4316/6636 cut-off events. [2024-06-27 23:52:03,023 INFO L125 PetriNetUnfolderBase]: For 1003076/1003076 co-relation queries the response was YES. [2024-06-27 23:52:03,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66521 conditions, 6636 events. 4316/6636 cut-off events. For 1003076/1003076 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 37447 event pairs, 1488 based on Foata normal form. 12/6647 useless extension candidates. Maximal degree in co-relation 66345. Up to 5471 conditions per place. [2024-06-27 23:52:03,133 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 429 selfloop transitions, 180 changer transitions 0/639 dead transitions. [2024-06-27 23:52:03,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 639 transitions, 13274 flow [2024-06-27 23:52:03,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:52:03,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:52:03,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 23:52:03,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 23:52:03,135 INFO L175 Difference]: Start difference. First operand has 358 places, 606 transitions, 11836 flow. Second operand 8 states and 154 transitions. [2024-06-27 23:52:03,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 639 transitions, 13274 flow [2024-06-27 23:52:05,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 639 transitions, 13180 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-27 23:52:05,663 INFO L231 Difference]: Finished difference. Result has 358 places, 609 transitions, 12189 flow [2024-06-27 23:52:05,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11742, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12189, PETRI_PLACES=358, PETRI_TRANSITIONS=609} [2024-06-27 23:52:05,663 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-27 23:52:05,664 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 609 transitions, 12189 flow [2024-06-27 23:52:05,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:05,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:52:05,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:52:05,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 23:52:05,664 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:52:05,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:52:05,664 INFO L85 PathProgramCache]: Analyzing trace with hash 311518624, now seen corresponding path program 9 times [2024-06-27 23:52:05,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:52:05,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620610564] [2024-06-27 23:52:05,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:52:05,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:52:05,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:08,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:52:08,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:08,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620610564] [2024-06-27 23:52:08,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620610564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:08,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:08,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:52:08,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144841293] [2024-06-27 23:52:08,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:08,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:52:08,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:08,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:52:08,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:52:08,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:52:08,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 609 transitions, 12189 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:08,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:08,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:52:08,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:52:10,213 INFO L124 PetriNetUnfolderBase]: 4337/6667 cut-off events. [2024-06-27 23:52:10,213 INFO L125 PetriNetUnfolderBase]: For 1000394/1000394 co-relation queries the response was YES. [2024-06-27 23:52:10,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66413 conditions, 6667 events. 4337/6667 cut-off events. For 1000394/1000394 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 37698 event pairs, 1478 based on Foata normal form. 12/6678 useless extension candidates. Maximal degree in co-relation 66236. Up to 5319 conditions per place. [2024-06-27 23:52:10,303 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 433 selfloop transitions, 174 changer transitions 0/637 dead transitions. [2024-06-27 23:52:10,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 637 transitions, 13453 flow [2024-06-27 23:52:10,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:52:10,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:52:10,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 23:52:10,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 23:52:10,304 INFO L175 Difference]: Start difference. First operand has 358 places, 609 transitions, 12189 flow. Second operand 9 states and 159 transitions. [2024-06-27 23:52:10,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 637 transitions, 13453 flow [2024-06-27 23:52:12,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 637 transitions, 13056 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 23:52:12,604 INFO L231 Difference]: Finished difference. Result has 360 places, 609 transitions, 12075 flow [2024-06-27 23:52:12,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11710, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12075, PETRI_PLACES=360, PETRI_TRANSITIONS=609} [2024-06-27 23:52:12,604 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 317 predicate places. [2024-06-27 23:52:12,604 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 609 transitions, 12075 flow [2024-06-27 23:52:12,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:12,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:52:12,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:52:12,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 23:52:12,605 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:52:12,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:52:12,605 INFO L85 PathProgramCache]: Analyzing trace with hash 581386960, now seen corresponding path program 3 times [2024-06-27 23:52:12,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:52:12,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344815312] [2024-06-27 23:52:12,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:52:12,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:52:12,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:13,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:52:13,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:13,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344815312] [2024-06-27 23:52:13,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344815312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:13,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:13,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:52:13,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327314821] [2024-06-27 23:52:13,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:13,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:52:13,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:13,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:52:13,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:52:14,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:52:14,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 609 transitions, 12075 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:14,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:14,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:52:14,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:52:15,988 INFO L124 PetriNetUnfolderBase]: 4451/6785 cut-off events. [2024-06-27 23:52:15,988 INFO L125 PetriNetUnfolderBase]: For 977922/977922 co-relation queries the response was YES. [2024-06-27 23:52:16,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66997 conditions, 6785 events. 4451/6785 cut-off events. For 977922/977922 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 37872 event pairs, 1672 based on Foata normal form. 3/6787 useless extension candidates. Maximal degree in co-relation 66819. Up to 6710 conditions per place. [2024-06-27 23:52:16,095 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 602 selfloop transitions, 21 changer transitions 0/626 dead transitions. [2024-06-27 23:52:16,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 626 transitions, 13476 flow [2024-06-27 23:52:16,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:52:16,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:52:16,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 130 transitions. [2024-06-27 23:52:16,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3439153439153439 [2024-06-27 23:52:16,096 INFO L175 Difference]: Start difference. First operand has 360 places, 609 transitions, 12075 flow. Second operand 9 states and 130 transitions. [2024-06-27 23:52:16,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 626 transitions, 13476 flow [2024-06-27 23:52:18,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 626 transitions, 12984 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-27 23:52:18,545 INFO L231 Difference]: Finished difference. Result has 361 places, 614 transitions, 11757 flow [2024-06-27 23:52:18,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11583, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11757, PETRI_PLACES=361, PETRI_TRANSITIONS=614} [2024-06-27 23:52:18,546 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 318 predicate places. [2024-06-27 23:52:18,546 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 614 transitions, 11757 flow [2024-06-27 23:52:18,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:18,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:52:18,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:52:18,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 23:52:18,547 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:52:18,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:52:18,547 INFO L85 PathProgramCache]: Analyzing trace with hash -693252195, now seen corresponding path program 8 times [2024-06-27 23:52:18,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:52:18,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596050344] [2024-06-27 23:52:18,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:52:18,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:52:18,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:20,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:52:20,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:20,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596050344] [2024-06-27 23:52:20,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596050344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:20,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:20,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:52:20,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663854793] [2024-06-27 23:52:20,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:20,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:52:20,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:20,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:52:20,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:52:20,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:52:20,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 614 transitions, 11757 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:20,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:20,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:52:20,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:52:22,144 INFO L124 PetriNetUnfolderBase]: 4479/6825 cut-off events. [2024-06-27 23:52:22,144 INFO L125 PetriNetUnfolderBase]: For 972269/972273 co-relation queries the response was YES. [2024-06-27 23:52:22,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66522 conditions, 6825 events. 4479/6825 cut-off events. For 972269/972273 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 38085 event pairs, 1664 based on Foata normal form. 6/6830 useless extension candidates. Maximal degree in co-relation 66344. Up to 6706 conditions per place. [2024-06-27 23:52:22,260 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 586 selfloop transitions, 44 changer transitions 0/633 dead transitions. [2024-06-27 23:52:22,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 633 transitions, 13398 flow [2024-06-27 23:52:22,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:52:22,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:52:22,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 23:52:22,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-27 23:52:22,261 INFO L175 Difference]: Start difference. First operand has 361 places, 614 transitions, 11757 flow. Second operand 8 states and 127 transitions. [2024-06-27 23:52:22,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 633 transitions, 13398 flow [2024-06-27 23:52:24,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 633 transitions, 13233 flow, removed 55 selfloop flow, removed 8 redundant places. [2024-06-27 23:52:24,953 INFO L231 Difference]: Finished difference. Result has 362 places, 622 transitions, 11892 flow [2024-06-27 23:52:24,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11592, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11892, PETRI_PLACES=362, PETRI_TRANSITIONS=622} [2024-06-27 23:52:24,953 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-27 23:52:24,953 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 622 transitions, 11892 flow [2024-06-27 23:52:24,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:24,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:52:24,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:52:24,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 23:52:24,954 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:52:24,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:52:24,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1203350665, now seen corresponding path program 9 times [2024-06-27 23:52:24,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:52:24,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298695202] [2024-06-27 23:52:24,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:52:24,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:52:24,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:26,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:52:26,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:26,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298695202] [2024-06-27 23:52:26,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298695202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:26,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:26,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:52:26,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952349395] [2024-06-27 23:52:26,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:26,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:52:26,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:26,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:52:26,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:52:26,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:52:26,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 622 transitions, 11892 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:26,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:26,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:52:26,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:52:28,362 INFO L124 PetriNetUnfolderBase]: 4491/6842 cut-off events. [2024-06-27 23:52:28,362 INFO L125 PetriNetUnfolderBase]: For 993174/993178 co-relation queries the response was YES. [2024-06-27 23:52:28,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66927 conditions, 6842 events. 4491/6842 cut-off events. For 993174/993178 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 38246 event pairs, 1663 based on Foata normal form. 6/6847 useless extension candidates. Maximal degree in co-relation 66749. Up to 6659 conditions per place. [2024-06-27 23:52:28,654 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 574 selfloop transitions, 61 changer transitions 0/638 dead transitions. [2024-06-27 23:52:28,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 638 transitions, 13635 flow [2024-06-27 23:52:28,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:52:28,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:52:28,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-27 23:52:28,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36772486772486773 [2024-06-27 23:52:28,655 INFO L175 Difference]: Start difference. First operand has 362 places, 622 transitions, 11892 flow. Second operand 9 states and 139 transitions. [2024-06-27 23:52:28,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 638 transitions, 13635 flow [2024-06-27 23:52:30,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 638 transitions, 13486 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-27 23:52:30,789 INFO L231 Difference]: Finished difference. Result has 366 places, 626 transitions, 11970 flow [2024-06-27 23:52:30,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11743, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11970, PETRI_PLACES=366, PETRI_TRANSITIONS=626} [2024-06-27 23:52:30,789 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 323 predicate places. [2024-06-27 23:52:30,790 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 626 transitions, 11970 flow [2024-06-27 23:52:30,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:30,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:52:30,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:52:30,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 23:52:30,790 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:52:30,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:52:30,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1203350262, now seen corresponding path program 4 times [2024-06-27 23:52:30,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:52:30,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073082597] [2024-06-27 23:52:30,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:52:30,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:52:30,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:32,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:52:32,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:32,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073082597] [2024-06-27 23:52:32,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073082597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:32,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:32,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:52:32,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475427830] [2024-06-27 23:52:32,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:32,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:52:32,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:32,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:52:32,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:52:32,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:52:32,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 626 transitions, 11970 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:32,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:32,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:52:32,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:52:34,329 INFO L124 PetriNetUnfolderBase]: 4522/6884 cut-off events. [2024-06-27 23:52:34,329 INFO L125 PetriNetUnfolderBase]: For 1028620/1028620 co-relation queries the response was YES. [2024-06-27 23:52:34,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67732 conditions, 6884 events. 4522/6884 cut-off events. For 1028620/1028620 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 38474 event pairs, 1674 based on Foata normal form. 3/6886 useless extension candidates. Maximal degree in co-relation 67553. Up to 6777 conditions per place. [2024-06-27 23:52:34,437 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 608 selfloop transitions, 37 changer transitions 0/648 dead transitions. [2024-06-27 23:52:34,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 648 transitions, 13665 flow [2024-06-27 23:52:34,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:52:34,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:52:34,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-27 23:52:34,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36243386243386244 [2024-06-27 23:52:34,438 INFO L175 Difference]: Start difference. First operand has 366 places, 626 transitions, 11970 flow. Second operand 9 states and 137 transitions. [2024-06-27 23:52:34,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 648 transitions, 13665 flow [2024-06-27 23:52:37,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 648 transitions, 13258 flow, removed 48 selfloop flow, removed 10 redundant places. [2024-06-27 23:52:37,060 INFO L231 Difference]: Finished difference. Result has 365 places, 634 transitions, 11839 flow [2024-06-27 23:52:37,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11563, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11839, PETRI_PLACES=365, PETRI_TRANSITIONS=634} [2024-06-27 23:52:37,061 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-27 23:52:37,061 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 634 transitions, 11839 flow [2024-06-27 23:52:37,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:37,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:52:37,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:52:37,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 23:52:37,062 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:52:37,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:52:37,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1190463252, now seen corresponding path program 5 times [2024-06-27 23:52:37,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:52:37,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968993406] [2024-06-27 23:52:37,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:52:37,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:52:37,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:38,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:52:38,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:38,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968993406] [2024-06-27 23:52:38,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968993406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:38,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:38,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:52:38,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004810685] [2024-06-27 23:52:38,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:38,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:52:38,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:38,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:52:38,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:52:38,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:52:38,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 634 transitions, 11839 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:38,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:38,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:52:38,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:52:40,528 INFO L124 PetriNetUnfolderBase]: 4513/6872 cut-off events. [2024-06-27 23:52:40,528 INFO L125 PetriNetUnfolderBase]: For 1036800/1036800 co-relation queries the response was YES. [2024-06-27 23:52:40,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67300 conditions, 6872 events. 4513/6872 cut-off events. For 1036800/1036800 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 38361 event pairs, 1672 based on Foata normal form. 3/6874 useless extension candidates. Maximal degree in co-relation 67123. Up to 6785 conditions per place. [2024-06-27 23:52:40,633 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 617 selfloop transitions, 28 changer transitions 0/648 dead transitions. [2024-06-27 23:52:40,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 648 transitions, 13177 flow [2024-06-27 23:52:40,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:52:40,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:52:40,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-27 23:52:40,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3544973544973545 [2024-06-27 23:52:40,634 INFO L175 Difference]: Start difference. First operand has 365 places, 634 transitions, 11839 flow. Second operand 9 states and 134 transitions. [2024-06-27 23:52:40,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 648 transitions, 13177 flow [2024-06-27 23:52:43,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 648 transitions, 12990 flow, removed 83 selfloop flow, removed 5 redundant places. [2024-06-27 23:52:43,207 INFO L231 Difference]: Finished difference. Result has 369 places, 634 transitions, 11716 flow [2024-06-27 23:52:43,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11652, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11716, PETRI_PLACES=369, PETRI_TRANSITIONS=634} [2024-06-27 23:52:43,207 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 326 predicate places. [2024-06-27 23:52:43,207 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 634 transitions, 11716 flow [2024-06-27 23:52:43,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:43,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:52:43,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:52:43,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 23:52:43,208 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:52:43,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:52:43,208 INFO L85 PathProgramCache]: Analyzing trace with hash 580987587, now seen corresponding path program 10 times [2024-06-27 23:52:43,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:52:43,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853520676] [2024-06-27 23:52:43,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:52:43,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:52:43,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:44,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:52:44,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:44,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853520676] [2024-06-27 23:52:44,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853520676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:44,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:44,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:52:44,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560039806] [2024-06-27 23:52:44,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:44,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:52:44,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:44,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:52:44,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:52:44,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:52:44,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 634 transitions, 11716 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:44,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:44,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:52:44,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:52:46,656 INFO L124 PetriNetUnfolderBase]: 4507/6865 cut-off events. [2024-06-27 23:52:46,657 INFO L125 PetriNetUnfolderBase]: For 1044773/1044777 co-relation queries the response was YES. [2024-06-27 23:52:46,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67136 conditions, 6865 events. 4507/6865 cut-off events. For 1044773/1044777 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 38349 event pairs, 1663 based on Foata normal form. 6/6870 useless extension candidates. Maximal degree in co-relation 66957. Up to 6685 conditions per place. [2024-06-27 23:52:46,762 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 576 selfloop transitions, 66 changer transitions 0/645 dead transitions. [2024-06-27 23:52:46,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 645 transitions, 13212 flow [2024-06-27 23:52:46,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:52:46,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:52:46,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-27 23:52:46,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-27 23:52:46,763 INFO L175 Difference]: Start difference. First operand has 369 places, 634 transitions, 11716 flow. Second operand 9 states and 138 transitions. [2024-06-27 23:52:46,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 645 transitions, 13212 flow [2024-06-27 23:52:49,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 645 transitions, 13074 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-27 23:52:49,530 INFO L231 Difference]: Finished difference. Result has 370 places, 634 transitions, 11717 flow [2024-06-27 23:52:49,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11578, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11717, PETRI_PLACES=370, PETRI_TRANSITIONS=634} [2024-06-27 23:52:49,530 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-27 23:52:49,530 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 634 transitions, 11717 flow [2024-06-27 23:52:49,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:49,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:52:49,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:52:49,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 23:52:49,531 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:52:49,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:52:49,532 INFO L85 PathProgramCache]: Analyzing trace with hash 580987246, now seen corresponding path program 6 times [2024-06-27 23:52:49,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:52:49,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054793863] [2024-06-27 23:52:49,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:52:49,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:52:49,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:51,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:52:51,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:51,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054793863] [2024-06-27 23:52:51,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054793863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:51,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:51,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:52:51,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734113177] [2024-06-27 23:52:51,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:51,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:52:51,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:51,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:52:51,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:52:51,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:52:51,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 634 transitions, 11717 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:51,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:51,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:52:51,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:52:53,298 INFO L124 PetriNetUnfolderBase]: 4400/6756 cut-off events. [2024-06-27 23:52:53,298 INFO L125 PetriNetUnfolderBase]: For 1062734/1062738 co-relation queries the response was YES. [2024-06-27 23:52:53,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66637 conditions, 6756 events. 4400/6756 cut-off events. For 1062734/1062738 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 38242 event pairs, 1598 based on Foata normal form. 6/6761 useless extension candidates. Maximal degree in co-relation 66457. Up to 6441 conditions per place. [2024-06-27 23:52:53,401 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 569 selfloop transitions, 43 changer transitions 0/645 dead transitions. [2024-06-27 23:52:53,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 645 transitions, 12986 flow [2024-06-27 23:52:53,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:52:53,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:52:53,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 23:52:53,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-27 23:52:53,403 INFO L175 Difference]: Start difference. First operand has 370 places, 634 transitions, 11717 flow. Second operand 8 states and 133 transitions. [2024-06-27 23:52:53,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 645 transitions, 12986 flow [2024-06-27 23:52:56,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 645 transitions, 12767 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-27 23:52:56,232 INFO L231 Difference]: Finished difference. Result has 371 places, 635 transitions, 11604 flow [2024-06-27 23:52:56,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11498, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11604, PETRI_PLACES=371, PETRI_TRANSITIONS=635} [2024-06-27 23:52:56,233 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-27 23:52:56,233 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 635 transitions, 11604 flow [2024-06-27 23:52:56,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:56,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:52:56,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:52:56,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 23:52:56,233 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:52:56,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:52:56,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1233948565, now seen corresponding path program 1 times [2024-06-27 23:52:56,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:52:56,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347486798] [2024-06-27 23:52:56,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:52:56,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:52:56,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:58,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:52:58,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:58,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347486798] [2024-06-27 23:52:58,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347486798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:58,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:58,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:52:58,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658136900] [2024-06-27 23:52:58,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:58,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:52:58,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:58,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:52:58,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:52:58,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:52:58,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 635 transitions, 11604 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:58,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:58,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:52:58,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:53:00,836 INFO L124 PetriNetUnfolderBase]: 4516/6878 cut-off events. [2024-06-27 23:53:00,836 INFO L125 PetriNetUnfolderBase]: For 1080822/1080822 co-relation queries the response was YES. [2024-06-27 23:53:00,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67389 conditions, 6878 events. 4516/6878 cut-off events. For 1080822/1080822 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 38429 event pairs, 1669 based on Foata normal form. 2/6879 useless extension candidates. Maximal degree in co-relation 67208. Up to 6766 conditions per place. [2024-06-27 23:53:00,944 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 625 selfloop transitions, 30 changer transitions 0/658 dead transitions. [2024-06-27 23:53:00,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 658 transitions, 13066 flow [2024-06-27 23:53:00,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:53:00,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:53:00,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-27 23:53:00,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-27 23:53:00,945 INFO L175 Difference]: Start difference. First operand has 371 places, 635 transitions, 11604 flow. Second operand 9 states and 140 transitions. [2024-06-27 23:53:00,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 658 transitions, 13066 flow [2024-06-27 23:53:03,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 658 transitions, 12957 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 23:53:03,838 INFO L231 Difference]: Finished difference. Result has 374 places, 641 transitions, 11659 flow [2024-06-27 23:53:03,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11495, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11659, PETRI_PLACES=374, PETRI_TRANSITIONS=641} [2024-06-27 23:53:03,839 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 331 predicate places. [2024-06-27 23:53:03,839 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 641 transitions, 11659 flow [2024-06-27 23:53:03,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:03,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:53:03,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:53:03,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 23:53:03,840 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:53:03,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:53:03,841 INFO L85 PathProgramCache]: Analyzing trace with hash -609396599, now seen corresponding path program 2 times [2024-06-27 23:53:03,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:53:03,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328816376] [2024-06-27 23:53:03,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:53:03,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:53:03,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:53:05,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:53:05,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:53:05,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328816376] [2024-06-27 23:53:05,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328816376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:53:05,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:53:05,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:53:05,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497561134] [2024-06-27 23:53:05,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:53:05,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:53:05,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:53:05,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:53:05,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:53:06,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:53:06,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 641 transitions, 11659 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:06,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:53:06,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:53:06,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:53:08,217 INFO L124 PetriNetUnfolderBase]: 4542/6914 cut-off events. [2024-06-27 23:53:08,217 INFO L125 PetriNetUnfolderBase]: For 1110369/1110369 co-relation queries the response was YES. [2024-06-27 23:53:08,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68416 conditions, 6914 events. 4542/6914 cut-off events. For 1110369/1110369 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 38650 event pairs, 1670 based on Foata normal form. 2/6915 useless extension candidates. Maximal degree in co-relation 68234. Up to 6733 conditions per place. [2024-06-27 23:53:08,320 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 612 selfloop transitions, 54 changer transitions 0/669 dead transitions. [2024-06-27 23:53:08,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 669 transitions, 13591 flow [2024-06-27 23:53:08,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:53:08,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:53:08,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 23:53:08,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-27 23:53:08,321 INFO L175 Difference]: Start difference. First operand has 374 places, 641 transitions, 11659 flow. Second operand 8 states and 137 transitions. [2024-06-27 23:53:08,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 669 transitions, 13591 flow [2024-06-27 23:53:10,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 669 transitions, 13501 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-27 23:53:10,661 INFO L231 Difference]: Finished difference. Result has 375 places, 650 transitions, 11847 flow [2024-06-27 23:53:10,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11569, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11847, PETRI_PLACES=375, PETRI_TRANSITIONS=650} [2024-06-27 23:53:10,662 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 332 predicate places. [2024-06-27 23:53:10,662 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 650 transitions, 11847 flow [2024-06-27 23:53:10,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:10,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:53:10,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:53:10,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 23:53:10,662 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:53:10,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:53:10,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1596468712, now seen corresponding path program 1 times [2024-06-27 23:53:10,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:53:10,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911336589] [2024-06-27 23:53:10,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:53:10,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:53:10,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:53:12,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:53:12,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:53:12,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911336589] [2024-06-27 23:53:12,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911336589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:53:12,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:53:12,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:53:12,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128964518] [2024-06-27 23:53:12,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:53:12,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:53:12,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:53:12,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:53:12,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:53:12,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:53:12,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 650 transitions, 11847 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:12,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:53:12,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:53:12,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:53:14,974 INFO L124 PetriNetUnfolderBase]: 4557/6935 cut-off events. [2024-06-27 23:53:14,975 INFO L125 PetriNetUnfolderBase]: For 1140531/1140531 co-relation queries the response was YES. [2024-06-27 23:53:15,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69208 conditions, 6935 events. 4557/6935 cut-off events. For 1140531/1140531 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 38773 event pairs, 1676 based on Foata normal form. 3/6937 useless extension candidates. Maximal degree in co-relation 69024. Up to 6797 conditions per place. [2024-06-27 23:53:15,087 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 626 selfloop transitions, 45 changer transitions 0/674 dead transitions. [2024-06-27 23:53:15,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 674 transitions, 13533 flow [2024-06-27 23:53:15,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:53:15,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:53:15,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 23:53:15,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 23:53:15,088 INFO L175 Difference]: Start difference. First operand has 375 places, 650 transitions, 11847 flow. Second operand 8 states and 136 transitions. [2024-06-27 23:53:15,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 674 transitions, 13533 flow [2024-06-27 23:53:17,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 674 transitions, 13474 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-27 23:53:17,683 INFO L231 Difference]: Finished difference. Result has 381 places, 656 transitions, 11997 flow [2024-06-27 23:53:17,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11788, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11997, PETRI_PLACES=381, PETRI_TRANSITIONS=656} [2024-06-27 23:53:17,683 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 338 predicate places. [2024-06-27 23:53:17,683 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 656 transitions, 11997 flow [2024-06-27 23:53:17,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:17,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:53:17,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:53:17,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 23:53:17,684 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:53:17,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:53:17,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1596468929, now seen corresponding path program 3 times [2024-06-27 23:53:17,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:53:17,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332050581] [2024-06-27 23:53:17,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:53:17,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:53:17,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:53:19,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:53:19,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:53:19,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332050581] [2024-06-27 23:53:19,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332050581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:53:19,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:53:19,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:53:19,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55758494] [2024-06-27 23:53:19,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:53:19,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:53:19,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:53:19,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:53:19,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:53:19,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:53:19,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 656 transitions, 11997 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:19,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:53:19,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:53:19,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:53:22,276 INFO L124 PetriNetUnfolderBase]: 4551/6927 cut-off events. [2024-06-27 23:53:22,277 INFO L125 PetriNetUnfolderBase]: For 1152506/1152506 co-relation queries the response was YES. [2024-06-27 23:53:22,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69588 conditions, 6927 events. 4551/6927 cut-off events. For 1152506/1152506 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 38741 event pairs, 1670 based on Foata normal form. 2/6928 useless extension candidates. Maximal degree in co-relation 69400. Up to 6749 conditions per place. [2024-06-27 23:53:22,391 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 616 selfloop transitions, 55 changer transitions 0/674 dead transitions. [2024-06-27 23:53:22,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 674 transitions, 13603 flow [2024-06-27 23:53:22,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:53:22,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:53:22,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 23:53:22,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-27 23:53:22,392 INFO L175 Difference]: Start difference. First operand has 381 places, 656 transitions, 11997 flow. Second operand 8 states and 135 transitions. [2024-06-27 23:53:22,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 674 transitions, 13603 flow [2024-06-27 23:53:25,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 674 transitions, 13513 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-27 23:53:25,151 INFO L231 Difference]: Finished difference. Result has 385 places, 656 transitions, 12026 flow [2024-06-27 23:53:25,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11907, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12026, PETRI_PLACES=385, PETRI_TRANSITIONS=656} [2024-06-27 23:53:25,152 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 342 predicate places. [2024-06-27 23:53:25,152 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 656 transitions, 12026 flow [2024-06-27 23:53:25,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:25,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:53:25,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:53:25,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 23:53:25,153 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:53:25,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:53:25,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1726421741, now seen corresponding path program 4 times [2024-06-27 23:53:25,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:53:25,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964516757] [2024-06-27 23:53:25,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:53:25,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:53:25,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:53:27,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:53:27,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:53:27,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964516757] [2024-06-27 23:53:27,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964516757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:53:27,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:53:27,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:53:27,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508187137] [2024-06-27 23:53:27,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:53:27,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:53:27,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:53:27,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:53:27,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:53:27,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:53:27,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 656 transitions, 12026 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:27,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:53:27,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:53:27,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:53:29,558 INFO L124 PetriNetUnfolderBase]: 4561/6942 cut-off events. [2024-06-27 23:53:29,558 INFO L125 PetriNetUnfolderBase]: For 1175883/1175883 co-relation queries the response was YES. [2024-06-27 23:53:29,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70021 conditions, 6942 events. 4561/6942 cut-off events. For 1175883/1175883 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 38791 event pairs, 1671 based on Foata normal form. 2/6943 useless extension candidates. Maximal degree in co-relation 69830. Up to 6759 conditions per place. [2024-06-27 23:53:29,676 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 614 selfloop transitions, 56 changer transitions 0/673 dead transitions. [2024-06-27 23:53:29,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 673 transitions, 13670 flow [2024-06-27 23:53:29,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:53:29,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:53:29,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 23:53:29,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-27 23:53:29,677 INFO L175 Difference]: Start difference. First operand has 385 places, 656 transitions, 12026 flow. Second operand 8 states and 132 transitions. [2024-06-27 23:53:29,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 673 transitions, 13670 flow [2024-06-27 23:53:33,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 673 transitions, 13541 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 23:53:33,243 INFO L231 Difference]: Finished difference. Result has 387 places, 659 transitions, 12079 flow [2024-06-27 23:53:33,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11903, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12079, PETRI_PLACES=387, PETRI_TRANSITIONS=659} [2024-06-27 23:53:33,244 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 344 predicate places. [2024-06-27 23:53:33,244 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 659 transitions, 12079 flow [2024-06-27 23:53:33,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:33,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:53:33,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:53:33,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 23:53:33,245 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:53:33,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:53:33,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1190278957, now seen corresponding path program 5 times [2024-06-27 23:53:33,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:53:33,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926388946] [2024-06-27 23:53:33,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:53:33,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:53:33,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:53:35,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:53:35,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:53:35,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926388946] [2024-06-27 23:53:35,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926388946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:53:35,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:53:35,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:53:35,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933967818] [2024-06-27 23:53:35,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:53:35,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:53:35,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:53:35,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:53:35,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:53:35,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:53:35,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 659 transitions, 12079 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:35,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:53:35,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:53:35,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:53:37,938 INFO L124 PetriNetUnfolderBase]: 4571/6956 cut-off events. [2024-06-27 23:53:37,939 INFO L125 PetriNetUnfolderBase]: For 1199310/1199310 co-relation queries the response was YES. [2024-06-27 23:53:38,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70366 conditions, 6956 events. 4571/6956 cut-off events. For 1199310/1199310 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 38906 event pairs, 1669 based on Foata normal form. 2/6957 useless extension candidates. Maximal degree in co-relation 70172. Up to 6769 conditions per place. [2024-06-27 23:53:38,044 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 611 selfloop transitions, 62 changer transitions 0/676 dead transitions. [2024-06-27 23:53:38,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 676 transitions, 13731 flow [2024-06-27 23:53:38,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:53:38,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:53:38,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 23:53:38,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-27 23:53:38,046 INFO L175 Difference]: Start difference. First operand has 387 places, 659 transitions, 12079 flow. Second operand 8 states and 131 transitions. [2024-06-27 23:53:38,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 676 transitions, 13731 flow [2024-06-27 23:53:41,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 676 transitions, 13564 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-27 23:53:41,722 INFO L231 Difference]: Finished difference. Result has 390 places, 662 transitions, 12106 flow [2024-06-27 23:53:41,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11931, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12106, PETRI_PLACES=390, PETRI_TRANSITIONS=662} [2024-06-27 23:53:41,723 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-27 23:53:41,723 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 662 transitions, 12106 flow [2024-06-27 23:53:41,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:41,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:53:41,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:53:41,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 23:53:41,723 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:53:41,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:53:41,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1190278740, now seen corresponding path program 2 times [2024-06-27 23:53:41,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:53:41,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708701608] [2024-06-27 23:53:41,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:53:41,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:53:41,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:53:43,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:53:43,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:53:43,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708701608] [2024-06-27 23:53:43,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708701608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:53:43,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:53:43,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:53:43,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513043016] [2024-06-27 23:53:43,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:53:43,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:53:43,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:53:43,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:53:43,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:53:43,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:53:43,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 662 transitions, 12106 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:43,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:53:43,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:53:43,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:53:46,316 INFO L124 PetriNetUnfolderBase]: 4610/7009 cut-off events. [2024-06-27 23:53:46,317 INFO L125 PetriNetUnfolderBase]: For 1241969/1241973 co-relation queries the response was YES. [2024-06-27 23:53:46,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71256 conditions, 7009 events. 4610/7009 cut-off events. For 1241969/1241973 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 39200 event pairs, 1667 based on Foata normal form. 7/7015 useless extension candidates. Maximal degree in co-relation 71059. Up to 6852 conditions per place. [2024-06-27 23:53:46,444 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 632 selfloop transitions, 51 changer transitions 0/686 dead transitions. [2024-06-27 23:53:46,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 686 transitions, 14020 flow [2024-06-27 23:53:46,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:53:46,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:53:46,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 23:53:46,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-27 23:53:46,445 INFO L175 Difference]: Start difference. First operand has 390 places, 662 transitions, 12106 flow. Second operand 8 states and 133 transitions. [2024-06-27 23:53:46,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 686 transitions, 14020 flow [2024-06-27 23:53:50,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 686 transitions, 13901 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 23:53:50,172 INFO L231 Difference]: Finished difference. Result has 393 places, 668 transitions, 12205 flow [2024-06-27 23:53:50,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11987, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12205, PETRI_PLACES=393, PETRI_TRANSITIONS=668} [2024-06-27 23:53:50,172 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-27 23:53:50,172 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 668 transitions, 12205 flow [2024-06-27 23:53:50,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:50,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:53:50,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:53:50,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 23:53:50,173 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:53:50,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:53:50,173 INFO L85 PathProgramCache]: Analyzing trace with hash -465500489, now seen corresponding path program 6 times [2024-06-27 23:53:50,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:53:50,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026906908] [2024-06-27 23:53:50,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:53:50,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:53:50,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:53:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:53:52,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:53:52,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026906908] [2024-06-27 23:53:52,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026906908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:53:52,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:53:52,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:53:52,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39150774] [2024-06-27 23:53:52,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:53:52,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:53:52,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:53:52,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:53:52,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:53:52,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:53:52,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 668 transitions, 12205 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:52,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:53:52,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:53:52,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:53:54,816 INFO L124 PetriNetUnfolderBase]: 4604/7002 cut-off events. [2024-06-27 23:53:54,816 INFO L125 PetriNetUnfolderBase]: For 1251861/1251861 co-relation queries the response was YES. [2024-06-27 23:53:54,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71223 conditions, 7002 events. 4604/7002 cut-off events. For 1251861/1251861 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 39172 event pairs, 1672 based on Foata normal form. 2/7003 useless extension candidates. Maximal degree in co-relation 71024. Up to 6818 conditions per place. [2024-06-27 23:53:54,921 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 621 selfloop transitions, 58 changer transitions 0/682 dead transitions. [2024-06-27 23:53:54,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 682 transitions, 13621 flow [2024-06-27 23:53:54,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:53:54,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:53:54,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 23:53:54,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-27 23:53:54,923 INFO L175 Difference]: Start difference. First operand has 393 places, 668 transitions, 12205 flow. Second operand 8 states and 133 transitions. [2024-06-27 23:53:54,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 682 transitions, 13621 flow [2024-06-27 23:53:58,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 682 transitions, 13453 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-27 23:53:58,294 INFO L231 Difference]: Finished difference. Result has 397 places, 668 transitions, 12161 flow [2024-06-27 23:53:58,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12037, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12161, PETRI_PLACES=397, PETRI_TRANSITIONS=668} [2024-06-27 23:53:58,295 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-27 23:53:58,295 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 668 transitions, 12161 flow [2024-06-27 23:53:58,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:58,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:53:58,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:53:58,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 23:53:58,295 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:53:58,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:53:58,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1197630390, now seen corresponding path program 3 times [2024-06-27 23:53:58,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:53:58,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140858199] [2024-06-27 23:53:58,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:53:58,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:53:58,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:54:00,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:54:00,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:54:00,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140858199] [2024-06-27 23:54:00,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140858199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:54:00,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:54:00,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:54:00,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117749301] [2024-06-27 23:54:00,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:54:00,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:54:00,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:54:00,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:54:00,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:54:00,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:54:00,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 668 transitions, 12161 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:54:00,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:54:00,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:54:00,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:54:02,762 INFO L124 PetriNetUnfolderBase]: 4595/6989 cut-off events. [2024-06-27 23:54:02,763 INFO L125 PetriNetUnfolderBase]: For 1263792/1263796 co-relation queries the response was YES. [2024-06-27 23:54:02,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70831 conditions, 6989 events. 4595/6989 cut-off events. For 1263792/1263796 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 39143 event pairs, 1664 based on Foata normal form. 7/6995 useless extension candidates. Maximal degree in co-relation 70629. Up to 6837 conditions per place. [2024-06-27 23:54:02,881 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 633 selfloop transitions, 49 changer transitions 0/685 dead transitions. [2024-06-27 23:54:02,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 685 transitions, 13775 flow [2024-06-27 23:54:02,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:54:02,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:54:02,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 23:54:02,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-27 23:54:02,882 INFO L175 Difference]: Start difference. First operand has 397 places, 668 transitions, 12161 flow. Second operand 8 states and 133 transitions. [2024-06-27 23:54:02,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 685 transitions, 13775 flow [2024-06-27 23:54:05,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 685 transitions, 13624 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 23:54:05,784 INFO L231 Difference]: Finished difference. Result has 399 places, 668 transitions, 12116 flow [2024-06-27 23:54:05,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12010, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12116, PETRI_PLACES=399, PETRI_TRANSITIONS=668} [2024-06-27 23:54:05,784 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 356 predicate places. [2024-06-27 23:54:05,784 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 668 transitions, 12116 flow [2024-06-27 23:54:05,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:54:05,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:54:05,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:54:05,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 23:54:05,785 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:54:05,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:54:05,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1190011830, now seen corresponding path program 4 times [2024-06-27 23:54:05,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:54:05,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611750931] [2024-06-27 23:54:05,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:54:05,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:54:05,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:54:07,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:54:07,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:54:07,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611750931] [2024-06-27 23:54:07,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611750931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:54:07,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:54:07,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:54:07,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104143782] [2024-06-27 23:54:07,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:54:07,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:54:07,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:54:07,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:54:07,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:54:08,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:54:08,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 668 transitions, 12116 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:54:08,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:54:08,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:54:08,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:54:10,293 INFO L124 PetriNetUnfolderBase]: 4586/6977 cut-off events. [2024-06-27 23:54:10,293 INFO L125 PetriNetUnfolderBase]: For 1270549/1270553 co-relation queries the response was YES. [2024-06-27 23:54:10,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70537 conditions, 6977 events. 4586/6977 cut-off events. For 1270549/1270553 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 39055 event pairs, 1662 based on Foata normal form. 7/6983 useless extension candidates. Maximal degree in co-relation 70333. Up to 6830 conditions per place. [2024-06-27 23:54:10,395 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 625 selfloop transitions, 54 changer transitions 0/682 dead transitions. [2024-06-27 23:54:10,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 682 transitions, 13520 flow [2024-06-27 23:54:10,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:54:10,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:54:10,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 23:54:10,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 23:54:10,397 INFO L175 Difference]: Start difference. First operand has 399 places, 668 transitions, 12116 flow. Second operand 8 states and 128 transitions. [2024-06-27 23:54:10,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 682 transitions, 13520 flow [2024-06-27 23:54:13,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 682 transitions, 13402 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 23:54:13,220 INFO L231 Difference]: Finished difference. Result has 401 places, 668 transitions, 12115 flow [2024-06-27 23:54:13,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11998, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12115, PETRI_PLACES=401, PETRI_TRANSITIONS=668} [2024-06-27 23:54:13,221 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 358 predicate places. [2024-06-27 23:54:13,221 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 668 transitions, 12115 flow [2024-06-27 23:54:13,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:54:13,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:54:13,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:54:13,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 23:54:13,221 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:54:13,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:54:13,221 INFO L85 PathProgramCache]: Analyzing trace with hash 169919256, now seen corresponding path program 1 times [2024-06-27 23:54:13,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:54:13,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993999143] [2024-06-27 23:54:13,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:54:13,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:54:13,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:54:14,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:54:14,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:54:14,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993999143] [2024-06-27 23:54:14,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993999143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:54:14,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:54:14,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:54:14,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194024271] [2024-06-27 23:54:14,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:54:14,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:54:14,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:54:14,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:54:14,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:54:14,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:54:14,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 668 transitions, 12115 flow. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:54:14,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:54:14,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:54:14,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:54:16,708 INFO L124 PetriNetUnfolderBase]: 3925/6329 cut-off events. [2024-06-27 23:54:16,709 INFO L125 PetriNetUnfolderBase]: For 1316406/1316422 co-relation queries the response was YES. [2024-06-27 23:54:16,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67410 conditions, 6329 events. 3925/6329 cut-off events. For 1316406/1316422 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 38458 event pairs, 565 based on Foata normal form. 19/6330 useless extension candidates. Maximal degree in co-relation 67204. Up to 4709 conditions per place. [2024-06-27 23:54:16,818 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 434 selfloop transitions, 173 changer transitions 0/713 dead transitions. [2024-06-27 23:54:16,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 713 transitions, 14105 flow [2024-06-27 23:54:16,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:54:16,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:54:16,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-27 23:54:16,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-27 23:54:16,820 INFO L175 Difference]: Start difference. First operand has 401 places, 668 transitions, 12115 flow. Second operand 8 states and 175 transitions. [2024-06-27 23:54:16,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 713 transitions, 14105 flow [2024-06-27 23:54:19,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 713 transitions, 13983 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 23:54:19,776 INFO L231 Difference]: Finished difference. Result has 406 places, 680 transitions, 12705 flow [2024-06-27 23:54:19,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11993, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12705, PETRI_PLACES=406, PETRI_TRANSITIONS=680} [2024-06-27 23:54:19,777 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 363 predicate places. [2024-06-27 23:54:19,777 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 680 transitions, 12705 flow [2024-06-27 23:54:19,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:54:19,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:54:19,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:54:19,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 23:54:19,777 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:54:19,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:54:19,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1160064946, now seen corresponding path program 1 times [2024-06-27 23:54:19,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:54:19,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770781681] [2024-06-27 23:54:19,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:54:19,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:54:19,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:54:21,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:54:21,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:54:21,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770781681] [2024-06-27 23:54:21,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770781681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:54:21,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:54:21,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:54:21,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632107327] [2024-06-27 23:54:21,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:54:21,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:54:21,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:54:21,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:54:21,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:54:21,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:54:21,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 680 transitions, 12705 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:54:21,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:54:21,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:54:21,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:54:23,948 INFO L124 PetriNetUnfolderBase]: 4662/7087 cut-off events. [2024-06-27 23:54:23,948 INFO L125 PetriNetUnfolderBase]: For 1335373/1335388 co-relation queries the response was YES. [2024-06-27 23:54:24,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73185 conditions, 7087 events. 4662/7087 cut-off events. For 1335373/1335388 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 39818 event pairs, 1046 based on Foata normal form. 16/7102 useless extension candidates. Maximal degree in co-relation 72975. Up to 6130 conditions per place. [2024-06-27 23:54:24,066 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 482 selfloop transitions, 234 changer transitions 0/719 dead transitions. [2024-06-27 23:54:24,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 719 transitions, 14857 flow [2024-06-27 23:54:24,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:54:24,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:54:24,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 23:54:24,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-27 23:54:24,067 INFO L175 Difference]: Start difference. First operand has 406 places, 680 transitions, 12705 flow. Second operand 9 states and 167 transitions. [2024-06-27 23:54:24,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 719 transitions, 14857 flow [2024-06-27 23:54:27,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 719 transitions, 14709 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-27 23:54:27,414 INFO L231 Difference]: Finished difference. Result has 411 places, 691 transitions, 13262 flow [2024-06-27 23:54:27,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12567, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13262, PETRI_PLACES=411, PETRI_TRANSITIONS=691} [2024-06-27 23:54:27,415 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 368 predicate places. [2024-06-27 23:54:27,415 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 691 transitions, 13262 flow [2024-06-27 23:54:27,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:54:27,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:54:27,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:54:27,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 23:54:27,415 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:54:27,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:54:27,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1743588938, now seen corresponding path program 2 times [2024-06-27 23:54:27,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:54:27,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950492951] [2024-06-27 23:54:27,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:54:27,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:54:27,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:54:29,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:54:29,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:54:29,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950492951] [2024-06-27 23:54:29,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950492951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:54:29,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:54:29,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:54:29,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829497850] [2024-06-27 23:54:29,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:54:29,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:54:29,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:54:29,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:54:29,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:54:29,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:54:29,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 691 transitions, 13262 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:54:29,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:54:29,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:54:29,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:54:32,039 INFO L124 PetriNetUnfolderBase]: 4615/7056 cut-off events. [2024-06-27 23:54:32,039 INFO L125 PetriNetUnfolderBase]: For 1371139/1371157 co-relation queries the response was YES. [2024-06-27 23:54:32,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74078 conditions, 7056 events. 4615/7056 cut-off events. For 1371139/1371157 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 39903 event pairs, 914 based on Foata normal form. 18/7066 useless extension candidates. Maximal degree in co-relation 73868. Up to 6139 conditions per place. [2024-06-27 23:54:32,162 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 491 selfloop transitions, 196 changer transitions 0/730 dead transitions. [2024-06-27 23:54:32,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 730 transitions, 15066 flow [2024-06-27 23:54:32,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:54:32,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:54:32,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-27 23:54:32,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-27 23:54:32,163 INFO L175 Difference]: Start difference. First operand has 411 places, 691 transitions, 13262 flow. Second operand 9 states and 182 transitions. [2024-06-27 23:54:32,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 730 transitions, 15066 flow [2024-06-27 23:54:35,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 730 transitions, 14881 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-27 23:54:35,466 INFO L231 Difference]: Finished difference. Result has 416 places, 698 transitions, 13598 flow [2024-06-27 23:54:35,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13079, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=691, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13598, PETRI_PLACES=416, PETRI_TRANSITIONS=698} [2024-06-27 23:54:35,467 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 373 predicate places. [2024-06-27 23:54:35,467 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 698 transitions, 13598 flow [2024-06-27 23:54:35,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:54:35,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:54:35,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:54:35,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 23:54:35,467 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:54:35,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:54:35,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1743349928, now seen corresponding path program 3 times [2024-06-27 23:54:35,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:54:35,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689585634] [2024-06-27 23:54:35,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:54:35,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:54:35,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:54:37,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:54:37,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:54:37,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689585634] [2024-06-27 23:54:37,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689585634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:54:37,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:54:37,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:54:37,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039363805] [2024-06-27 23:54:37,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:54:37,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:54:37,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:54:37,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:54:37,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:54:37,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:54:37,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 698 transitions, 13598 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:54:37,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:54:37,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:54:37,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:54:40,018 INFO L124 PetriNetUnfolderBase]: 4627/7076 cut-off events. [2024-06-27 23:54:40,018 INFO L125 PetriNetUnfolderBase]: For 1363189/1363205 co-relation queries the response was YES. [2024-06-27 23:54:40,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74736 conditions, 7076 events. 4627/7076 cut-off events. For 1363189/1363205 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 40286 event pairs, 1089 based on Foata normal form. 18/7090 useless extension candidates. Maximal degree in co-relation 74524. Up to 6291 conditions per place. [2024-06-27 23:54:40,131 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 498 selfloop transitions, 187 changer transitions 0/728 dead transitions. [2024-06-27 23:54:40,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 728 transitions, 15140 flow [2024-06-27 23:54:40,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:54:40,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:54:40,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-27 23:54:40,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-27 23:54:40,132 INFO L175 Difference]: Start difference. First operand has 416 places, 698 transitions, 13598 flow. Second operand 9 states and 177 transitions. [2024-06-27 23:54:40,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 728 transitions, 15140 flow [2024-06-27 23:54:43,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 728 transitions, 14656 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-27 23:54:43,552 INFO L231 Difference]: Finished difference. Result has 419 places, 701 transitions, 13566 flow [2024-06-27 23:54:43,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13133, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13566, PETRI_PLACES=419, PETRI_TRANSITIONS=701} [2024-06-27 23:54:43,552 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 376 predicate places. [2024-06-27 23:54:43,552 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 701 transitions, 13566 flow [2024-06-27 23:54:43,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:54:43,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:54:43,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:54:43,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 23:54:43,552 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:54:43,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:54:43,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1790737795, now seen corresponding path program 1 times [2024-06-27 23:54:43,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:54:43,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272828805] [2024-06-27 23:54:43,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:54:43,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:54:43,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:54:46,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:54:46,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:54:46,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272828805] [2024-06-27 23:54:46,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272828805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:54:46,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:54:46,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:54:46,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201506319] [2024-06-27 23:54:46,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:54:46,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:54:46,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:54:46,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:54:46,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:54:46,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:54:46,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 701 transitions, 13566 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:54:46,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:54:46,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:54:46,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:54:48,426 INFO L124 PetriNetUnfolderBase]: 4756/7223 cut-off events. [2024-06-27 23:54:48,426 INFO L125 PetriNetUnfolderBase]: For 1387962/1387977 co-relation queries the response was YES. [2024-06-27 23:54:48,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75827 conditions, 7223 events. 4756/7223 cut-off events. For 1387962/1387977 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 40702 event pairs, 1158 based on Foata normal form. 16/7238 useless extension candidates. Maximal degree in co-relation 75614. Up to 6153 conditions per place. [2024-06-27 23:54:48,540 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 491 selfloop transitions, 267 changer transitions 0/761 dead transitions. [2024-06-27 23:54:48,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 761 transitions, 16474 flow [2024-06-27 23:54:48,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:54:48,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:54:48,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-27 23:54:48,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-06-27 23:54:48,541 INFO L175 Difference]: Start difference. First operand has 419 places, 701 transitions, 13566 flow. Second operand 9 states and 186 transitions. [2024-06-27 23:54:48,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 761 transitions, 16474 flow [2024-06-27 23:54:52,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 761 transitions, 16086 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 23:54:52,223 INFO L231 Difference]: Finished difference. Result has 424 places, 730 transitions, 14393 flow [2024-06-27 23:54:52,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13178, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14393, PETRI_PLACES=424, PETRI_TRANSITIONS=730} [2024-06-27 23:54:52,224 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-27 23:54:52,224 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 730 transitions, 14393 flow [2024-06-27 23:54:52,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:54:52,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:54:52,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:54:52,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 23:54:52,224 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:54:52,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:54:52,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1743349618, now seen corresponding path program 2 times [2024-06-27 23:54:52,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:54:52,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622589345] [2024-06-27 23:54:52,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:54:52,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:54:52,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:54:54,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:54:54,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:54:54,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622589345] [2024-06-27 23:54:54,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622589345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:54:54,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:54:54,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:54:54,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053730150] [2024-06-27 23:54:54,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:54:54,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:54:54,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:54:54,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:54:54,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:54:54,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:54:54,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 730 transitions, 14393 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:54:54,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:54:54,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:54:54,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:54:56,753 INFO L124 PetriNetUnfolderBase]: 4746/7209 cut-off events. [2024-06-27 23:54:56,753 INFO L125 PetriNetUnfolderBase]: For 1410378/1410393 co-relation queries the response was YES. [2024-06-27 23:54:56,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77144 conditions, 7209 events. 4746/7209 cut-off events. For 1410378/1410393 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 40608 event pairs, 1152 based on Foata normal form. 16/7224 useless extension candidates. Maximal degree in co-relation 76928. Up to 6343 conditions per place. [2024-06-27 23:54:56,886 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 493 selfloop transitions, 262 changer transitions 0/758 dead transitions. [2024-06-27 23:54:56,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 758 transitions, 16427 flow [2024-06-27 23:54:56,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:54:56,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:54:56,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 23:54:56,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-27 23:54:56,887 INFO L175 Difference]: Start difference. First operand has 424 places, 730 transitions, 14393 flow. Second operand 9 states and 175 transitions. [2024-06-27 23:54:56,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 758 transitions, 16427 flow [2024-06-27 23:55:00,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 758 transitions, 16245 flow, removed 86 selfloop flow, removed 1 redundant places. [2024-06-27 23:55:00,575 INFO L231 Difference]: Finished difference. Result has 432 places, 730 transitions, 14747 flow [2024-06-27 23:55:00,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14211, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14747, PETRI_PLACES=432, PETRI_TRANSITIONS=730} [2024-06-27 23:55:00,575 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-27 23:55:00,576 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 730 transitions, 14747 flow [2024-06-27 23:55:00,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:00,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:00,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:00,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 23:55:00,576 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:55:00,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:00,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1219335848, now seen corresponding path program 4 times [2024-06-27 23:55:00,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:00,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116206055] [2024-06-27 23:55:00,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:00,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:00,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:02,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:55:02,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:02,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116206055] [2024-06-27 23:55:02,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116206055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:02,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:02,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:55:02,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351557694] [2024-06-27 23:55:02,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:02,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:55:02,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:02,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:55:02,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:55:02,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:55:02,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 730 transitions, 14747 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:02,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:02,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:55:02,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:05,134 INFO L124 PetriNetUnfolderBase]: 4674/7145 cut-off events. [2024-06-27 23:55:05,135 INFO L125 PetriNetUnfolderBase]: For 1452558/1452573 co-relation queries the response was YES. [2024-06-27 23:55:05,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77659 conditions, 7145 events. 4674/7145 cut-off events. For 1452558/1452573 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 40678 event pairs, 1097 based on Foata normal form. 18/7162 useless extension candidates. Maximal degree in co-relation 77439. Up to 6478 conditions per place. [2024-06-27 23:55:05,263 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 553 selfloop transitions, 162 changer transitions 0/759 dead transitions. [2024-06-27 23:55:05,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 759 transitions, 16324 flow [2024-06-27 23:55:05,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:55:05,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:55:05,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-27 23:55:05,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261904761904762 [2024-06-27 23:55:05,264 INFO L175 Difference]: Start difference. First operand has 432 places, 730 transitions, 14747 flow. Second operand 10 states and 179 transitions. [2024-06-27 23:55:05,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 759 transitions, 16324 flow [2024-06-27 23:55:09,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 759 transitions, 15838 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 23:55:09,937 INFO L231 Difference]: Finished difference. Result has 434 places, 733 transitions, 14646 flow [2024-06-27 23:55:09,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14261, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14646, PETRI_PLACES=434, PETRI_TRANSITIONS=733} [2024-06-27 23:55:09,937 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-27 23:55:09,937 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 733 transitions, 14646 flow [2024-06-27 23:55:09,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:09,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:09,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:09,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 23:55:09,938 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:55:09,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:09,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1236306178, now seen corresponding path program 3 times [2024-06-27 23:55:09,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:09,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645072336] [2024-06-27 23:55:09,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:09,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:09,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:12,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:55:12,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:12,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645072336] [2024-06-27 23:55:12,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645072336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:12,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:12,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:55:12,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412793052] [2024-06-27 23:55:12,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:12,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:55:12,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:12,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:55:12,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:55:12,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:55:12,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 733 transitions, 14646 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:12,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:12,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:55:12,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:15,527 INFO L124 PetriNetUnfolderBase]: 4772/7247 cut-off events. [2024-06-27 23:55:15,527 INFO L125 PetriNetUnfolderBase]: For 1461941/1461956 co-relation queries the response was YES. [2024-06-27 23:55:15,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78255 conditions, 7247 events. 4772/7247 cut-off events. For 1461941/1461956 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 40885 event pairs, 1155 based on Foata normal form. 16/7262 useless extension candidates. Maximal degree in co-relation 78035. Up to 6588 conditions per place. [2024-06-27 23:55:15,653 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 525 selfloop transitions, 235 changer transitions 0/763 dead transitions. [2024-06-27 23:55:15,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 763 transitions, 16536 flow [2024-06-27 23:55:15,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:55:15,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:55:15,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-27 23:55:15,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-27 23:55:15,654 INFO L175 Difference]: Start difference. First operand has 434 places, 733 transitions, 14646 flow. Second operand 10 states and 174 transitions. [2024-06-27 23:55:15,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 763 transitions, 16536 flow [2024-06-27 23:55:20,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 763 transitions, 16184 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-27 23:55:20,229 INFO L231 Difference]: Finished difference. Result has 436 places, 737 transitions, 14843 flow [2024-06-27 23:55:20,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14294, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14843, PETRI_PLACES=436, PETRI_TRANSITIONS=737} [2024-06-27 23:55:20,229 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-27 23:55:20,229 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 737 transitions, 14843 flow [2024-06-27 23:55:20,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:20,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:20,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:20,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 23:55:20,230 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:55:20,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:20,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1236316408, now seen corresponding path program 4 times [2024-06-27 23:55:20,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:20,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727003933] [2024-06-27 23:55:20,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:20,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:20,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:22,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:55:22,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:22,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727003933] [2024-06-27 23:55:22,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727003933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:22,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:22,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:55:22,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776837636] [2024-06-27 23:55:22,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:22,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:55:22,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:22,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:55:22,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:55:22,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:55:22,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 737 transitions, 14843 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:22,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:22,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:55:22,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:25,088 INFO L124 PetriNetUnfolderBase]: 4798/7283 cut-off events. [2024-06-27 23:55:25,089 INFO L125 PetriNetUnfolderBase]: For 1499920/1499935 co-relation queries the response was YES. [2024-06-27 23:55:25,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79165 conditions, 7283 events. 4798/7283 cut-off events. For 1499920/1499935 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 41083 event pairs, 1153 based on Foata normal form. 16/7298 useless extension candidates. Maximal degree in co-relation 78944. Up to 6572 conditions per place. [2024-06-27 23:55:25,200 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 517 selfloop transitions, 248 changer transitions 0/768 dead transitions. [2024-06-27 23:55:25,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 768 transitions, 17025 flow [2024-06-27 23:55:25,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:55:25,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:55:25,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 23:55:25,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-27 23:55:25,202 INFO L175 Difference]: Start difference. First operand has 436 places, 737 transitions, 14843 flow. Second operand 9 states and 169 transitions. [2024-06-27 23:55:25,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 768 transitions, 17025 flow [2024-06-27 23:55:29,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 768 transitions, 16657 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-27 23:55:29,650 INFO L231 Difference]: Finished difference. Result has 438 places, 745 transitions, 15127 flow [2024-06-27 23:55:29,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14475, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15127, PETRI_PLACES=438, PETRI_TRANSITIONS=745} [2024-06-27 23:55:29,650 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-27 23:55:29,650 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 745 transitions, 15127 flow [2024-06-27 23:55:29,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:29,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:29,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:29,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 23:55:29,651 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:55:29,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:29,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1236305806, now seen corresponding path program 1 times [2024-06-27 23:55:29,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:29,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813795235] [2024-06-27 23:55:29,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:29,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:29,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:31,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:55:31,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:31,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813795235] [2024-06-27 23:55:31,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813795235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:31,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:31,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:55:31,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740834125] [2024-06-27 23:55:31,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:31,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:55:31,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:31,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:55:31,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:55:31,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:55:31,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 745 transitions, 15127 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:31,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:31,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:55:31,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:34,421 INFO L124 PetriNetUnfolderBase]: 4808/7297 cut-off events. [2024-06-27 23:55:34,422 INFO L125 PetriNetUnfolderBase]: For 1529461/1529476 co-relation queries the response was YES. [2024-06-27 23:55:34,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79692 conditions, 7297 events. 4808/7297 cut-off events. For 1529461/1529476 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 41202 event pairs, 1161 based on Foata normal form. 16/7312 useless extension candidates. Maximal degree in co-relation 79470. Up to 6472 conditions per place. [2024-06-27 23:55:34,577 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 536 selfloop transitions, 237 changer transitions 0/776 dead transitions. [2024-06-27 23:55:34,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 776 transitions, 17282 flow [2024-06-27 23:55:34,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:55:34,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:55:34,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-27 23:55:34,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-27 23:55:34,578 INFO L175 Difference]: Start difference. First operand has 438 places, 745 transitions, 15127 flow. Second operand 10 states and 178 transitions. [2024-06-27 23:55:34,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 776 transitions, 17282 flow [2024-06-27 23:55:38,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 776 transitions, 16920 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 23:55:38,999 INFO L231 Difference]: Finished difference. Result has 443 places, 749 transitions, 15329 flow [2024-06-27 23:55:38,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14765, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15329, PETRI_PLACES=443, PETRI_TRANSITIONS=749} [2024-06-27 23:55:38,999 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 400 predicate places. [2024-06-27 23:55:39,000 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 749 transitions, 15329 flow [2024-06-27 23:55:39,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:39,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:39,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:39,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 23:55:39,000 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:55:39,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:39,001 INFO L85 PathProgramCache]: Analyzing trace with hash 613697320, now seen corresponding path program 1 times [2024-06-27 23:55:39,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:39,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467538913] [2024-06-27 23:55:39,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:39,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:39,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:41,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:55:41,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:41,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467538913] [2024-06-27 23:55:41,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467538913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:41,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:41,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:55:41,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999957623] [2024-06-27 23:55:41,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:41,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:55:41,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:41,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:55:41,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:55:41,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:55:41,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 749 transitions, 15329 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:41,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:41,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:55:41,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:44,185 INFO L124 PetriNetUnfolderBase]: 4727/7220 cut-off events. [2024-06-27 23:55:44,185 INFO L125 PetriNetUnfolderBase]: For 1561234/1561250 co-relation queries the response was YES. [2024-06-27 23:55:44,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80063 conditions, 7220 events. 4727/7220 cut-off events. For 1561234/1561250 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 41133 event pairs, 1100 based on Foata normal form. 16/7235 useless extension candidates. Maximal degree in co-relation 79839. Up to 6526 conditions per place. [2024-06-27 23:55:44,316 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 620 selfloop transitions, 111 changer transitions 0/778 dead transitions. [2024-06-27 23:55:44,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 778 transitions, 16977 flow [2024-06-27 23:55:44,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:55:44,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:55:44,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 23:55:44,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-27 23:55:44,317 INFO L175 Difference]: Start difference. First operand has 443 places, 749 transitions, 15329 flow. Second operand 9 states and 166 transitions. [2024-06-27 23:55:44,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 778 transitions, 16977 flow [2024-06-27 23:55:49,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 778 transitions, 16561 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-27 23:55:49,107 INFO L231 Difference]: Finished difference. Result has 445 places, 753 transitions, 15231 flow [2024-06-27 23:55:49,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14913, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=638, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15231, PETRI_PLACES=445, PETRI_TRANSITIONS=753} [2024-06-27 23:55:49,107 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 402 predicate places. [2024-06-27 23:55:49,108 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 753 transitions, 15231 flow [2024-06-27 23:55:49,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:49,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:49,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:49,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 23:55:49,108 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:55:49,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:49,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1927939670, now seen corresponding path program 1 times [2024-06-27 23:55:49,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:49,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879647078] [2024-06-27 23:55:49,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:49,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:49,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:51,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:55:51,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:51,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879647078] [2024-06-27 23:55:51,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879647078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:51,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:51,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:55:51,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659164442] [2024-06-27 23:55:51,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:51,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:55:51,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:51,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:55:51,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:55:51,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:55:51,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 753 transitions, 15231 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:51,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:51,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:55:51,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:53,884 INFO L124 PetriNetUnfolderBase]: 4854/7360 cut-off events. [2024-06-27 23:55:53,884 INFO L125 PetriNetUnfolderBase]: For 1610819/1610839 co-relation queries the response was YES. [2024-06-27 23:55:53,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81762 conditions, 7360 events. 4854/7360 cut-off events. For 1610819/1610839 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 41535 event pairs, 1177 based on Foata normal form. 22/7381 useless extension candidates. Maximal degree in co-relation 81537. Up to 6699 conditions per place. [2024-06-27 23:55:53,993 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 578 selfloop transitions, 209 changer transitions 0/790 dead transitions. [2024-06-27 23:55:53,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 790 transitions, 17878 flow [2024-06-27 23:55:53,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:55:53,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:55:53,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 23:55:53,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-27 23:55:53,995 INFO L175 Difference]: Start difference. First operand has 445 places, 753 transitions, 15231 flow. Second operand 9 states and 163 transitions. [2024-06-27 23:55:53,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 790 transitions, 17878 flow [2024-06-27 23:55:58,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 790 transitions, 17579 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-27 23:55:58,595 INFO L231 Difference]: Finished difference. Result has 447 places, 765 transitions, 15689 flow [2024-06-27 23:55:58,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14932, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=753, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15689, PETRI_PLACES=447, PETRI_TRANSITIONS=765} [2024-06-27 23:55:58,596 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 404 predicate places. [2024-06-27 23:55:58,596 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 765 transitions, 15689 flow [2024-06-27 23:55:58,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:58,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:58,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:58,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 23:55:58,596 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:55:58,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:58,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1927939856, now seen corresponding path program 2 times [2024-06-27 23:55:58,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:58,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315622614] [2024-06-27 23:55:58,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:58,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:56:00,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:56:00,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:56:00,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315622614] [2024-06-27 23:56:00,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315622614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:56:00,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:56:00,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:56:00,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525824159] [2024-06-27 23:56:00,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:56:00,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:56:00,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:56:00,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:56:00,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:56:00,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:56:00,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 765 transitions, 15689 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:56:00,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:56:00,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:56:00,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:56:03,357 INFO L124 PetriNetUnfolderBase]: 4801/7324 cut-off events. [2024-06-27 23:56:03,357 INFO L125 PetriNetUnfolderBase]: For 1658051/1658067 co-relation queries the response was YES. [2024-06-27 23:56:03,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82642 conditions, 7324 events. 4801/7324 cut-off events. For 1658051/1658067 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 41801 event pairs, 1119 based on Foata normal form. 16/7339 useless extension candidates. Maximal degree in co-relation 82416. Up to 6295 conditions per place. [2024-06-27 23:56:03,489 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 606 selfloop transitions, 157 changer transitions 0/813 dead transitions. [2024-06-27 23:56:03,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 813 transitions, 18404 flow [2024-06-27 23:56:03,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:56:03,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:56:03,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 23:56:03,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-27 23:56:03,491 INFO L175 Difference]: Start difference. First operand has 447 places, 765 transitions, 15689 flow. Second operand 9 states and 172 transitions. [2024-06-27 23:56:03,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 813 transitions, 18404 flow [2024-06-27 23:56:08,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 813 transitions, 17802 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 23:56:08,580 INFO L231 Difference]: Finished difference. Result has 452 places, 786 transitions, 15868 flow [2024-06-27 23:56:08,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15087, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=765, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15868, PETRI_PLACES=452, PETRI_TRANSITIONS=786} [2024-06-27 23:56:08,581 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 409 predicate places. [2024-06-27 23:56:08,581 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 786 transitions, 15868 flow [2024-06-27 23:56:08,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:56:08,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:56:08,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:56:08,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 23:56:08,582 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:56:08,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:56:08,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1350438286, now seen corresponding path program 3 times [2024-06-27 23:56:08,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:56:08,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937907594] [2024-06-27 23:56:08,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:56:08,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:56:08,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:56:10,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:56:10,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:56:10,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937907594] [2024-06-27 23:56:10,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937907594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:56:10,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:56:10,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:56:10,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813685029] [2024-06-27 23:56:10,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:56:10,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:56:10,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:56:10,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:56:10,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:56:10,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:56:10,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 786 transitions, 15868 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:56:10,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:56:10,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:56:10,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:56:13,528 INFO L124 PetriNetUnfolderBase]: 4797/7320 cut-off events. [2024-06-27 23:56:13,528 INFO L125 PetriNetUnfolderBase]: For 1672487/1672503 co-relation queries the response was YES. [2024-06-27 23:56:13,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83074 conditions, 7320 events. 4797/7320 cut-off events. For 1672487/1672503 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 41761 event pairs, 1124 based on Foata normal form. 16/7335 useless extension candidates. Maximal degree in co-relation 82845. Up to 6292 conditions per place. [2024-06-27 23:56:13,659 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 593 selfloop transitions, 166 changer transitions 0/809 dead transitions. [2024-06-27 23:56:13,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 809 transitions, 17972 flow [2024-06-27 23:56:13,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:56:13,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:56:13,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 23:56:13,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-27 23:56:13,660 INFO L175 Difference]: Start difference. First operand has 452 places, 786 transitions, 15868 flow. Second operand 9 states and 166 transitions. [2024-06-27 23:56:13,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 809 transitions, 17972 flow [2024-06-27 23:56:18,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 809 transitions, 17804 flow, removed 75 selfloop flow, removed 2 redundant places. [2024-06-27 23:56:18,508 INFO L231 Difference]: Finished difference. Result has 459 places, 786 transitions, 16040 flow [2024-06-27 23:56:18,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15700, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=786, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16040, PETRI_PLACES=459, PETRI_TRANSITIONS=786} [2024-06-27 23:56:18,508 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 416 predicate places. [2024-06-27 23:56:18,508 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 786 transitions, 16040 flow [2024-06-27 23:56:18,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:56:18,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:56:18,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:56:18,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 23:56:18,509 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:56:18,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:56:18,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1923298040, now seen corresponding path program 2 times [2024-06-27 23:56:18,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:56:18,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574724610] [2024-06-27 23:56:18,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:56:18,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:56:18,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:56:20,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:56:20,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:56:20,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574724610] [2024-06-27 23:56:20,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574724610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:56:20,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:56:20,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:56:20,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967241462] [2024-06-27 23:56:20,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:56:20,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:56:20,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:56:20,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:56:20,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:56:20,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:56:20,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 786 transitions, 16040 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:56:20,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:56:20,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:56:20,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:56:23,561 INFO L124 PetriNetUnfolderBase]: 4910/7440 cut-off events. [2024-06-27 23:56:23,561 INFO L125 PetriNetUnfolderBase]: For 1711968/1711988 co-relation queries the response was YES. [2024-06-27 23:56:23,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84531 conditions, 7440 events. 4910/7440 cut-off events. For 1711968/1711988 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 41997 event pairs, 1146 based on Foata normal form. 22/7461 useless extension candidates. Maximal degree in co-relation 84299. Up to 6769 conditions per place. [2024-06-27 23:56:23,712 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 600 selfloop transitions, 213 changer transitions 0/816 dead transitions. [2024-06-27 23:56:23,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 816 transitions, 18613 flow [2024-06-27 23:56:23,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:56:23,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:56:23,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 23:56:23,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 23:56:23,713 INFO L175 Difference]: Start difference. First operand has 459 places, 786 transitions, 16040 flow. Second operand 9 states and 159 transitions. [2024-06-27 23:56:23,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 816 transitions, 18613 flow [2024-06-27 23:56:29,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 816 transitions, 18277 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-27 23:56:29,335 INFO L231 Difference]: Finished difference. Result has 460 places, 794 transitions, 16341 flow [2024-06-27 23:56:29,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15704, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=786, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16341, PETRI_PLACES=460, PETRI_TRANSITIONS=794} [2024-06-27 23:56:29,335 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 417 predicate places. [2024-06-27 23:56:29,336 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 794 transitions, 16341 flow [2024-06-27 23:56:29,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:56:29,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:56:29,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:56:29,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 23:56:29,336 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:56:29,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:56:29,338 INFO L85 PathProgramCache]: Analyzing trace with hash 824268652, now seen corresponding path program 3 times [2024-06-27 23:56:29,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:56:29,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085448179] [2024-06-27 23:56:29,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:56:29,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:56:29,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:56:31,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:56:31,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:56:31,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085448179] [2024-06-27 23:56:31,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085448179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:56:31,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:56:31,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:56:31,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93090564] [2024-06-27 23:56:31,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:56:31,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:56:31,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:56:31,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:56:31,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:56:31,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:56:31,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 794 transitions, 16341 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:56:31,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:56:31,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:56:31,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:56:34,197 INFO L124 PetriNetUnfolderBase]: 4896/7421 cut-off events. [2024-06-27 23:56:34,197 INFO L125 PetriNetUnfolderBase]: For 1714039/1714059 co-relation queries the response was YES. [2024-06-27 23:56:34,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84244 conditions, 7421 events. 4896/7421 cut-off events. For 1714039/1714059 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 41910 event pairs, 1147 based on Foata normal form. 22/7442 useless extension candidates. Maximal degree in co-relation 84011. Up to 6756 conditions per place. [2024-06-27 23:56:34,341 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 599 selfloop transitions, 213 changer transitions 0/815 dead transitions. [2024-06-27 23:56:34,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 815 transitions, 18491 flow [2024-06-27 23:56:34,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:56:34,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:56:34,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 23:56:34,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-27 23:56:34,342 INFO L175 Difference]: Start difference. First operand has 460 places, 794 transitions, 16341 flow. Second operand 9 states and 157 transitions. [2024-06-27 23:56:34,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 815 transitions, 18491 flow [2024-06-27 23:56:40,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 815 transitions, 18044 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-27 23:56:40,480 INFO L231 Difference]: Finished difference. Result has 463 places, 794 transitions, 16341 flow [2024-06-27 23:56:40,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15894, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16341, PETRI_PLACES=463, PETRI_TRANSITIONS=794} [2024-06-27 23:56:40,480 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 420 predicate places. [2024-06-27 23:56:40,480 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 794 transitions, 16341 flow [2024-06-27 23:56:40,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:56:40,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:56:40,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:56:40,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 23:56:40,481 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:56:40,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:56:40,481 INFO L85 PathProgramCache]: Analyzing trace with hash 255351848, now seen corresponding path program 2 times [2024-06-27 23:56:40,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:56:40,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769691911] [2024-06-27 23:56:40,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:56:40,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:56:40,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:56:42,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:56:42,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:56:42,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769691911] [2024-06-27 23:56:42,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769691911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:56:42,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:56:42,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:56:42,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100386987] [2024-06-27 23:56:42,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:56:42,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:56:42,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:56:42,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:56:42,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:56:43,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:56:43,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 794 transitions, 16341 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:56:43,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:56:43,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:56:43,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:56:45,851 INFO L124 PetriNetUnfolderBase]: 4948/7491 cut-off events. [2024-06-27 23:56:45,851 INFO L125 PetriNetUnfolderBase]: For 1755479/1755494 co-relation queries the response was YES. [2024-06-27 23:56:45,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85479 conditions, 7491 events. 4948/7491 cut-off events. For 1755479/1755494 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 42307 event pairs, 1182 based on Foata normal form. 16/7506 useless extension candidates. Maximal degree in co-relation 85245. Up to 6611 conditions per place. [2024-06-27 23:56:45,979 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 605 selfloop transitions, 228 changer transitions 0/836 dead transitions. [2024-06-27 23:56:45,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 836 transitions, 19049 flow [2024-06-27 23:56:45,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:56:45,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:56:45,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-27 23:56:45,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-27 23:56:45,981 INFO L175 Difference]: Start difference. First operand has 463 places, 794 transitions, 16341 flow. Second operand 10 states and 181 transitions. [2024-06-27 23:56:45,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 836 transitions, 19049 flow [2024-06-27 23:56:51,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 836 transitions, 18677 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 23:56:51,251 INFO L231 Difference]: Finished difference. Result has 467 places, 810 transitions, 16812 flow [2024-06-27 23:56:51,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15969, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16812, PETRI_PLACES=467, PETRI_TRANSITIONS=810} [2024-06-27 23:56:51,252 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 424 predicate places. [2024-06-27 23:56:51,252 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 810 transitions, 16812 flow [2024-06-27 23:56:51,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:56:51,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:56:51,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:56:51,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 23:56:51,252 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:56:51,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:56:51,253 INFO L85 PathProgramCache]: Analyzing trace with hash -2037808258, now seen corresponding path program 5 times [2024-06-27 23:56:51,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:56:51,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501931095] [2024-06-27 23:56:51,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:56:51,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:56:51,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:56:53,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:56:53,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:56:53,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501931095] [2024-06-27 23:56:53,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501931095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:56:53,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:56:53,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:56:53,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552118224] [2024-06-27 23:56:53,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:56:53,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:56:53,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:56:53,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:56:53,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:56:53,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:56:53,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 810 transitions, 16812 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:56:53,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:56:53,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:56:53,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:56:56,044 INFO L124 PetriNetUnfolderBase]: 4942/7484 cut-off events. [2024-06-27 23:56:56,044 INFO L125 PetriNetUnfolderBase]: For 1773414/1773429 co-relation queries the response was YES. [2024-06-27 23:56:56,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85779 conditions, 7484 events. 4942/7484 cut-off events. For 1773414/1773429 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 42325 event pairs, 1154 based on Foata normal form. 16/7499 useless extension candidates. Maximal degree in co-relation 85543. Up to 6794 conditions per place. [2024-06-27 23:56:56,200 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 567 selfloop transitions, 262 changer transitions 0/832 dead transitions. [2024-06-27 23:56:56,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 832 transitions, 18786 flow [2024-06-27 23:56:56,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:56:56,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:56:56,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 23:56:56,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-27 23:56:56,201 INFO L175 Difference]: Start difference. First operand has 467 places, 810 transitions, 16812 flow. Second operand 9 states and 166 transitions. [2024-06-27 23:56:56,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 832 transitions, 18786 flow [2024-06-27 23:57:02,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 832 transitions, 18479 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-27 23:57:02,386 INFO L231 Difference]: Finished difference. Result has 471 places, 810 transitions, 17045 flow [2024-06-27 23:57:02,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=16505, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=810, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17045, PETRI_PLACES=471, PETRI_TRANSITIONS=810} [2024-06-27 23:57:02,386 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 428 predicate places. [2024-06-27 23:57:02,386 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 810 transitions, 17045 flow [2024-06-27 23:57:02,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:57:02,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:57:02,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:57:02,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 23:57:02,387 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:57:02,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:57:02,388 INFO L85 PathProgramCache]: Analyzing trace with hash -2037818798, now seen corresponding path program 5 times [2024-06-27 23:57:02,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:57:02,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970408180] [2024-06-27 23:57:02,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:57:02,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:57:02,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:57:04,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:57:04,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:57:04,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970408180] [2024-06-27 23:57:04,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970408180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:57:04,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:57:04,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:57:04,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149373797] [2024-06-27 23:57:04,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:57:04,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:57:04,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:57:04,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:57:04,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:57:05,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:57:05,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 810 transitions, 17045 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:57:05,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:57:05,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:57:05,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:57:07,957 INFO L124 PetriNetUnfolderBase]: 4855/7405 cut-off events. [2024-06-27 23:57:07,957 INFO L125 PetriNetUnfolderBase]: For 1825888/1825903 co-relation queries the response was YES. [2024-06-27 23:57:08,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85845 conditions, 7405 events. 4855/7405 cut-off events. For 1825888/1825903 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 42359 event pairs, 1088 based on Foata normal form. 18/7422 useless extension candidates. Maximal degree in co-relation 85608. Up to 6687 conditions per place. [2024-06-27 23:57:08,102 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 614 selfloop transitions, 169 changer transitions 0/835 dead transitions. [2024-06-27 23:57:08,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 835 transitions, 18752 flow [2024-06-27 23:57:08,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:57:08,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:57:08,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 23:57:08,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-27 23:57:08,104 INFO L175 Difference]: Start difference. First operand has 471 places, 810 transitions, 17045 flow. Second operand 9 states and 161 transitions. [2024-06-27 23:57:08,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 835 transitions, 18752 flow [2024-06-27 23:57:13,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 835 transitions, 18204 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 23:57:13,822 INFO L231 Difference]: Finished difference. Result has 472 places, 813 transitions, 16906 flow [2024-06-27 23:57:13,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=16497, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=810, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=641, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16906, PETRI_PLACES=472, PETRI_TRANSITIONS=813} [2024-06-27 23:57:13,823 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 429 predicate places. [2024-06-27 23:57:13,823 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 813 transitions, 16906 flow [2024-06-27 23:57:13,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:57:13,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:57:13,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:57:13,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 23:57:13,823 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:57:13,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:57:13,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1350326066, now seen corresponding path program 3 times [2024-06-27 23:57:13,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:57:13,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615539390] [2024-06-27 23:57:13,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:57:13,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:57:13,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:57:16,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:57:16,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:57:16,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615539390] [2024-06-27 23:57:16,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615539390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:57:16,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:57:16,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:57:16,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848223609] [2024-06-27 23:57:16,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:57:16,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:57:16,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:57:16,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:57:16,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:57:16,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:57:16,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 813 transitions, 16906 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:57:16,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:57:16,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:57:16,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:57:19,258 INFO L124 PetriNetUnfolderBase]: 4968/7523 cut-off events. [2024-06-27 23:57:19,259 INFO L125 PetriNetUnfolderBase]: For 1836600/1836620 co-relation queries the response was YES. [2024-06-27 23:57:19,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86515 conditions, 7523 events. 4968/7523 cut-off events. For 1836600/1836620 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 42558 event pairs, 1151 based on Foata normal form. 20/7542 useless extension candidates. Maximal degree in co-relation 86277. Up to 6637 conditions per place. [2024-06-27 23:57:19,405 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 616 selfloop transitions, 221 changer transitions 0/840 dead transitions. [2024-06-27 23:57:19,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 840 transitions, 19446 flow [2024-06-27 23:57:19,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:57:19,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:57:19,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-27 23:57:19,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-27 23:57:19,406 INFO L175 Difference]: Start difference. First operand has 472 places, 813 transitions, 16906 flow. Second operand 10 states and 176 transitions. [2024-06-27 23:57:19,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 840 transitions, 19446 flow [2024-06-27 23:57:24,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 840 transitions, 19074 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 23:57:24,824 INFO L231 Difference]: Finished difference. Result has 475 places, 817 transitions, 17076 flow [2024-06-27 23:57:24,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=16540, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=813, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17076, PETRI_PLACES=475, PETRI_TRANSITIONS=817} [2024-06-27 23:57:24,824 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 432 predicate places. [2024-06-27 23:57:24,824 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 817 transitions, 17076 flow [2024-06-27 23:57:24,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:57:24,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:57:24,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:57:24,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 23:57:24,825 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:57:24,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:57:24,825 INFO L85 PathProgramCache]: Analyzing trace with hash 824265056, now seen corresponding path program 4 times [2024-06-27 23:57:24,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:57:24,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42997265] [2024-06-27 23:57:24,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:57:24,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:57:24,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:57:27,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:57:27,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:57:27,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42997265] [2024-06-27 23:57:27,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42997265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:57:27,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:57:27,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:57:27,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165808229] [2024-06-27 23:57:27,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:57:27,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:57:27,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:57:27,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:57:27,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:57:27,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:57:27,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 817 transitions, 17076 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:57:27,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:57:27,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:57:27,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:57:30,439 INFO L124 PetriNetUnfolderBase]: 4980/7540 cut-off events. [2024-06-27 23:57:30,439 INFO L125 PetriNetUnfolderBase]: For 1836970/1836990 co-relation queries the response was YES. [2024-06-27 23:57:30,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86756 conditions, 7540 events. 4980/7540 cut-off events. For 1836970/1836990 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 42590 event pairs, 1153 based on Foata normal form. 20/7559 useless extension candidates. Maximal degree in co-relation 86517. Up to 6650 conditions per place. [2024-06-27 23:57:30,560 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 616 selfloop transitions, 225 changer transitions 0/844 dead transitions. [2024-06-27 23:57:30,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 844 transitions, 19632 flow [2024-06-27 23:57:30,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:57:30,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:57:30,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-27 23:57:30,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 23:57:30,562 INFO L175 Difference]: Start difference. First operand has 475 places, 817 transitions, 17076 flow. Second operand 10 states and 175 transitions. [2024-06-27 23:57:30,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 844 transitions, 19632 flow [2024-06-27 23:57:35,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 844 transitions, 19169 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-27 23:57:36,010 INFO L231 Difference]: Finished difference. Result has 478 places, 821 transitions, 17165 flow [2024-06-27 23:57:36,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=16628, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=817, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17165, PETRI_PLACES=478, PETRI_TRANSITIONS=821} [2024-06-27 23:57:36,010 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 435 predicate places. [2024-06-27 23:57:36,010 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 821 transitions, 17165 flow [2024-06-27 23:57:36,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:57:36,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:57:36,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:57:36,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 23:57:36,011 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:57:36,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:57:36,011 INFO L85 PathProgramCache]: Analyzing trace with hash 824277146, now seen corresponding path program 5 times [2024-06-27 23:57:36,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:57:36,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752668530] [2024-06-27 23:57:36,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:57:36,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:57:36,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:57:38,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:57:38,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:57:38,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752668530] [2024-06-27 23:57:38,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752668530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:57:38,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:57:38,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:57:38,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030088360] [2024-06-27 23:57:38,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:57:38,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:57:38,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:57:38,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:57:38,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:57:38,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:57:38,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 821 transitions, 17165 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:57:38,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:57:38,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:57:38,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:57:41,332 INFO L124 PetriNetUnfolderBase]: 4976/7535 cut-off events. [2024-06-27 23:57:41,332 INFO L125 PetriNetUnfolderBase]: For 1850679/1850699 co-relation queries the response was YES. [2024-06-27 23:57:41,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86647 conditions, 7535 events. 4976/7535 cut-off events. For 1850679/1850699 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 42621 event pairs, 1153 based on Foata normal form. 20/7554 useless extension candidates. Maximal degree in co-relation 86407. Up to 6648 conditions per place. [2024-06-27 23:57:41,476 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 612 selfloop transitions, 229 changer transitions 0/844 dead transitions. [2024-06-27 23:57:41,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 844 transitions, 19633 flow [2024-06-27 23:57:41,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:57:41,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:57:41,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-27 23:57:41,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-27 23:57:41,477 INFO L175 Difference]: Start difference. First operand has 478 places, 821 transitions, 17165 flow. Second operand 10 states and 174 transitions. [2024-06-27 23:57:41,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 844 transitions, 19633 flow [2024-06-27 23:57:47,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 844 transitions, 19138 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-27 23:57:47,342 INFO L231 Difference]: Finished difference. Result has 481 places, 821 transitions, 17137 flow [2024-06-27 23:57:47,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=16670, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=821, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17137, PETRI_PLACES=481, PETRI_TRANSITIONS=821} [2024-06-27 23:57:47,343 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 438 predicate places. [2024-06-27 23:57:47,343 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 821 transitions, 17137 flow [2024-06-27 23:57:47,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:57:47,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:57:47,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:57:47,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 23:57:47,344 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:57:47,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:57:47,344 INFO L85 PathProgramCache]: Analyzing trace with hash 824277580, now seen corresponding path program 1 times [2024-06-27 23:57:47,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:57:47,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342244824] [2024-06-27 23:57:47,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:57:47,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:57:47,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:57:49,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:57:49,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:57:49,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342244824] [2024-06-27 23:57:49,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342244824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:57:49,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:57:49,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:57:49,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442955285] [2024-06-27 23:57:49,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:57:49,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:57:49,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:57:49,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:57:49,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:57:49,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:57:49,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 821 transitions, 17137 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:57:49,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:57:49,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:57:49,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:57:52,440 INFO L124 PetriNetUnfolderBase]: 4994/7560 cut-off events. [2024-06-27 23:57:52,440 INFO L125 PetriNetUnfolderBase]: For 1888355/1888357 co-relation queries the response was YES. [2024-06-27 23:57:52,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87255 conditions, 7560 events. 4994/7560 cut-off events. For 1888355/1888357 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 42796 event pairs, 1398 based on Foata normal form. 4/7563 useless extension candidates. Maximal degree in co-relation 87014. Up to 7390 conditions per place. [2024-06-27 23:57:52,573 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 774 selfloop transitions, 76 changer transitions 0/853 dead transitions. [2024-06-27 23:57:52,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 853 transitions, 19349 flow [2024-06-27 23:57:52,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:57:52,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:57:52,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-27 23:57:52,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-27 23:57:52,574 INFO L175 Difference]: Start difference. First operand has 481 places, 821 transitions, 17137 flow. Second operand 10 states and 164 transitions. [2024-06-27 23:57:52,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 853 transitions, 19349 flow [2024-06-27 23:57:59,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 853 transitions, 18896 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-27 23:57:59,028 INFO L231 Difference]: Finished difference. Result has 484 places, 830 transitions, 17064 flow [2024-06-27 23:57:59,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=16684, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=821, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=748, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17064, PETRI_PLACES=484, PETRI_TRANSITIONS=830} [2024-06-27 23:57:59,028 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 441 predicate places. [2024-06-27 23:57:59,028 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 830 transitions, 17064 flow [2024-06-27 23:57:59,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:57:59,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:57:59,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:57:59,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 23:57:59,029 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:57:59,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:57:59,029 INFO L85 PathProgramCache]: Analyzing trace with hash 824264684, now seen corresponding path program 6 times [2024-06-27 23:57:59,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:57:59,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122855788] [2024-06-27 23:57:59,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:57:59,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:57:59,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:58:01,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:58:01,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:58:01,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122855788] [2024-06-27 23:58:01,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122855788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:58:01,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:58:01,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:58:01,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051400851] [2024-06-27 23:58:01,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:58:01,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:58:01,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:58:01,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:58:01,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:58:01,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:58:01,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 830 transitions, 17064 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:01,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:58:01,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:58:01,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:58:04,459 INFO L124 PetriNetUnfolderBase]: 5006/7577 cut-off events. [2024-06-27 23:58:04,459 INFO L125 PetriNetUnfolderBase]: For 1917631/1917651 co-relation queries the response was YES. [2024-06-27 23:58:04,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87518 conditions, 7577 events. 5006/7577 cut-off events. For 1917631/1917651 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 42800 event pairs, 1145 based on Foata normal form. 20/7596 useless extension candidates. Maximal degree in co-relation 87275. Up to 6896 conditions per place. [2024-06-27 23:58:04,856 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 625 selfloop transitions, 224 changer transitions 0/852 dead transitions. [2024-06-27 23:58:04,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 852 transitions, 19384 flow [2024-06-27 23:58:04,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:58:04,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:58:04,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 23:58:04,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-27 23:58:04,858 INFO L175 Difference]: Start difference. First operand has 484 places, 830 transitions, 17064 flow. Second operand 9 states and 152 transitions. [2024-06-27 23:58:04,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 852 transitions, 19384 flow [2024-06-27 23:58:10,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 852 transitions, 19280 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-27 23:58:10,154 INFO L231 Difference]: Finished difference. Result has 490 places, 834 transitions, 17503 flow [2024-06-27 23:58:10,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=16960, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=830, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17503, PETRI_PLACES=490, PETRI_TRANSITIONS=834} [2024-06-27 23:58:10,155 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 447 predicate places. [2024-06-27 23:58:10,155 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 834 transitions, 17503 flow [2024-06-27 23:58:10,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:10,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:58:10,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:58:10,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 23:58:10,156 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:58:10,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:58:10,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1750931158, now seen corresponding path program 7 times [2024-06-27 23:58:10,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:58:10,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935090900] [2024-06-27 23:58:10,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:58:10,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:58:10,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:58:12,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:58:12,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:58:12,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935090900] [2024-06-27 23:58:12,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935090900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:58:12,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:58:12,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:58:12,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352607591] [2024-06-27 23:58:12,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:58:12,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:58:12,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:58:12,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:58:12,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:58:12,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:58:12,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 834 transitions, 17503 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:12,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:58:12,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:58:12,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:58:14,953 INFO L124 PetriNetUnfolderBase]: 5032/7613 cut-off events. [2024-06-27 23:58:14,953 INFO L125 PetriNetUnfolderBase]: For 1966079/1966099 co-relation queries the response was YES. [2024-06-27 23:58:15,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88957 conditions, 7613 events. 5032/7613 cut-off events. For 1966079/1966099 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 43030 event pairs, 1145 based on Foata normal form. 20/7632 useless extension candidates. Maximal degree in co-relation 88711. Up to 6896 conditions per place. [2024-06-27 23:58:15,097 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 625 selfloop transitions, 233 changer transitions 0/861 dead transitions. [2024-06-27 23:58:15,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 861 transitions, 20183 flow [2024-06-27 23:58:15,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:58:15,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:58:15,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 23:58:15,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 23:58:15,099 INFO L175 Difference]: Start difference. First operand has 490 places, 834 transitions, 17503 flow. Second operand 9 states and 164 transitions. [2024-06-27 23:58:15,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 861 transitions, 20183 flow [2024-06-27 23:58:21,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 861 transitions, 19690 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-27 23:58:21,512 INFO L231 Difference]: Finished difference. Result has 492 places, 842 transitions, 17663 flow [2024-06-27 23:58:21,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=17010, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=834, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17663, PETRI_PLACES=492, PETRI_TRANSITIONS=842} [2024-06-27 23:58:21,512 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 449 predicate places. [2024-06-27 23:58:21,512 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 842 transitions, 17663 flow [2024-06-27 23:58:21,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:21,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:58:21,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:58:21,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 23:58:21,513 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:58:21,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:58:21,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1750920928, now seen corresponding path program 8 times [2024-06-27 23:58:21,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:58:21,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011885555] [2024-06-27 23:58:21,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:58:21,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:58:21,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:58:23,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:58:23,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:58:23,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011885555] [2024-06-27 23:58:23,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011885555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:58:23,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:58:23,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:58:23,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182726451] [2024-06-27 23:58:23,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:58:23,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:58:23,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:58:23,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:58:23,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:58:23,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:58:23,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 842 transitions, 17663 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:23,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:58:23,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:58:23,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:58:26,361 INFO L124 PetriNetUnfolderBase]: 5026/7605 cut-off events. [2024-06-27 23:58:26,361 INFO L125 PetriNetUnfolderBase]: For 1982481/1982501 co-relation queries the response was YES. [2024-06-27 23:58:26,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88856 conditions, 7605 events. 5026/7605 cut-off events. For 1982481/1982501 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 43002 event pairs, 1145 based on Foata normal form. 20/7624 useless extension candidates. Maximal degree in co-relation 88609. Up to 6926 conditions per place. [2024-06-27 23:58:26,510 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 633 selfloop transitions, 224 changer transitions 0/860 dead transitions. [2024-06-27 23:58:26,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 860 transitions, 19929 flow [2024-06-27 23:58:26,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:58:26,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:58:26,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 23:58:26,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 23:58:26,511 INFO L175 Difference]: Start difference. First operand has 492 places, 842 transitions, 17663 flow. Second operand 9 states and 162 transitions. [2024-06-27 23:58:26,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 860 transitions, 19929 flow [2024-06-27 23:58:32,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 860 transitions, 19548 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-27 23:58:32,416 INFO L231 Difference]: Finished difference. Result has 496 places, 842 transitions, 17739 flow [2024-06-27 23:58:32,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=17282, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=842, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17739, PETRI_PLACES=496, PETRI_TRANSITIONS=842} [2024-06-27 23:58:32,417 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 453 predicate places. [2024-06-27 23:58:32,417 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 842 transitions, 17739 flow [2024-06-27 23:58:32,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:32,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:58:32,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:58:32,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 23:58:32,417 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:58:32,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:58:32,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1750931468, now seen corresponding path program 6 times [2024-06-27 23:58:32,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:58:32,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288191681] [2024-06-27 23:58:32,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:58:32,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:58:32,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:58:34,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:58:34,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:58:34,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288191681] [2024-06-27 23:58:34,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288191681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:58:34,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:58:34,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:58:34,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246241312] [2024-06-27 23:58:34,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:58:34,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:58:34,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:58:34,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:58:34,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:58:34,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:58:34,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 842 transitions, 17739 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:34,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:58:34,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:58:34,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:58:37,574 INFO L124 PetriNetUnfolderBase]: 4937/7524 cut-off events. [2024-06-27 23:58:37,575 INFO L125 PetriNetUnfolderBase]: For 2033328/2033348 co-relation queries the response was YES. [2024-06-27 23:58:37,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89186 conditions, 7524 events. 4937/7524 cut-off events. For 2033328/2033348 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 43076 event pairs, 1093 based on Foata normal form. 22/7545 useless extension candidates. Maximal degree in co-relation 88937. Up to 6816 conditions per place. [2024-06-27 23:58:37,707 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 663 selfloop transitions, 144 changer transitions 0/862 dead transitions. [2024-06-27 23:58:37,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 862 transitions, 19470 flow [2024-06-27 23:58:37,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:58:37,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:58:37,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 23:58:37,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 23:58:37,708 INFO L175 Difference]: Start difference. First operand has 496 places, 842 transitions, 17739 flow. Second operand 9 states and 164 transitions. [2024-06-27 23:58:37,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 862 transitions, 19470 flow [2024-06-27 23:58:43,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 862 transitions, 18990 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 23:58:43,449 INFO L231 Difference]: Finished difference. Result has 497 places, 845 transitions, 17614 flow [2024-06-27 23:58:43,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=17259, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=842, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=698, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17614, PETRI_PLACES=497, PETRI_TRANSITIONS=845} [2024-06-27 23:58:43,449 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 454 predicate places. [2024-06-27 23:58:43,450 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 845 transitions, 17614 flow [2024-06-27 23:58:43,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:43,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:58:43,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:58:43,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 23:58:43,450 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:58:43,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:58:43,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1563733184, now seen corresponding path program 4 times [2024-06-27 23:58:43,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:58:43,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283214794] [2024-06-27 23:58:43,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:58:43,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:58:43,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:58:45,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:58:45,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:58:45,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283214794] [2024-06-27 23:58:45,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283214794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:58:45,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:58:45,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:58:45,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620303355] [2024-06-27 23:58:45,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:58:45,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:58:45,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:58:45,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:58:45,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:58:45,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:58:45,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 845 transitions, 17614 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:45,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:58:45,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:58:45,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:58:47,863 INFO L124 PetriNetUnfolderBase]: 4978/7605 cut-off events. [2024-06-27 23:58:47,863 INFO L125 PetriNetUnfolderBase]: For 2088077/2088077 co-relation queries the response was YES. [2024-06-27 23:58:47,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89679 conditions, 7605 events. 4978/7605 cut-off events. For 2088077/2088077 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 43923 event pairs, 1572 based on Foata normal form. 6/7610 useless extension candidates. Maximal degree in co-relation 89429. Up to 6738 conditions per place. [2024-06-27 23:58:48,010 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 673 selfloop transitions, 153 changer transitions 0/881 dead transitions. [2024-06-27 23:58:48,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 881 transitions, 19639 flow [2024-06-27 23:58:48,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:58:48,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:58:48,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 23:58:48,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 23:58:48,012 INFO L175 Difference]: Start difference. First operand has 497 places, 845 transitions, 17614 flow. Second operand 8 states and 148 transitions. [2024-06-27 23:58:48,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 881 transitions, 19639 flow [2024-06-27 23:58:54,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 881 transitions, 19321 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-27 23:58:54,233 INFO L231 Difference]: Finished difference. Result has 498 places, 856 transitions, 17862 flow [2024-06-27 23:58:54,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=17296, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=845, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=692, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=17862, PETRI_PLACES=498, PETRI_TRANSITIONS=856} [2024-06-27 23:58:54,234 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 455 predicate places. [2024-06-27 23:58:54,234 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 856 transitions, 17862 flow [2024-06-27 23:58:54,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:54,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:58:54,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:58:54,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 23:58:54,234 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:58:54,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:58:54,235 INFO L85 PathProgramCache]: Analyzing trace with hash -490637238, now seen corresponding path program 5 times [2024-06-27 23:58:54,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:58:54,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93546985] [2024-06-27 23:58:54,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:58:54,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:58:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:58:55,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:58:55,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:58:55,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93546985] [2024-06-27 23:58:55,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93546985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:58:55,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:58:55,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:58:55,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415249861] [2024-06-27 23:58:55,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:58:55,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:58:55,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:58:55,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:58:55,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:58:56,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:58:56,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 856 transitions, 17862 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:56,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:58:56,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:58:56,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:58:58,857 INFO L124 PetriNetUnfolderBase]: 5073/7739 cut-off events. [2024-06-27 23:58:58,858 INFO L125 PetriNetUnfolderBase]: For 2178633/2178633 co-relation queries the response was YES. [2024-06-27 23:58:58,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92523 conditions, 7739 events. 5073/7739 cut-off events. For 2178633/2178633 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 44842 event pairs, 1580 based on Foata normal form. 6/7738 useless extension candidates. Maximal degree in co-relation 92272. Up to 6530 conditions per place. [2024-06-27 23:58:59,039 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 663 selfloop transitions, 195 changer transitions 0/913 dead transitions. [2024-06-27 23:58:59,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 913 transitions, 20856 flow [2024-06-27 23:58:59,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:58:59,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:58:59,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 23:58:59,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 23:58:59,041 INFO L175 Difference]: Start difference. First operand has 498 places, 856 transitions, 17862 flow. Second operand 9 states and 162 transitions. [2024-06-27 23:58:59,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 913 transitions, 20856 flow [2024-06-27 23:59:05,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 913 transitions, 20534 flow, removed 78 selfloop flow, removed 4 redundant places. [2024-06-27 23:59:05,986 INFO L231 Difference]: Finished difference. Result has 504 places, 881 transitions, 18585 flow [2024-06-27 23:59:05,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=17540, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=856, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=674, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18585, PETRI_PLACES=504, PETRI_TRANSITIONS=881} [2024-06-27 23:59:05,987 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 461 predicate places. [2024-06-27 23:59:05,987 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 881 transitions, 18585 flow [2024-06-27 23:59:05,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:05,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:59:05,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:59:05,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 23:59:05,988 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:59:05,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:59:05,988 INFO L85 PathProgramCache]: Analyzing trace with hash -490637052, now seen corresponding path program 4 times [2024-06-27 23:59:05,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:59:05,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047522631] [2024-06-27 23:59:05,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:59:05,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:59:06,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:59:07,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:59:07,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:59:07,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047522631] [2024-06-27 23:59:07,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047522631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:59:07,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:59:07,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:59:07,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578275573] [2024-06-27 23:59:07,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:59:07,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:59:07,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:59:07,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:59:07,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:59:07,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:59:07,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 881 transitions, 18585 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:07,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:59:07,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:59:07,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:59:10,446 INFO L124 PetriNetUnfolderBase]: 5224/7899 cut-off events. [2024-06-27 23:59:10,446 INFO L125 PetriNetUnfolderBase]: For 2214252/2214256 co-relation queries the response was YES. [2024-06-27 23:59:10,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95062 conditions, 7899 events. 5224/7899 cut-off events. For 2214252/2214256 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 45125 event pairs, 1676 based on Foata normal form. 8/7906 useless extension candidates. Maximal degree in co-relation 94809. Up to 7368 conditions per place. [2024-06-27 23:59:10,606 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 723 selfloop transitions, 189 changer transitions 0/915 dead transitions. [2024-06-27 23:59:10,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 915 transitions, 21388 flow [2024-06-27 23:59:10,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:59:10,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:59:10,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 23:59:10,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-27 23:59:10,607 INFO L175 Difference]: Start difference. First operand has 504 places, 881 transitions, 18585 flow. Second operand 9 states and 149 transitions. [2024-06-27 23:59:10,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 915 transitions, 21388 flow [2024-06-27 23:59:18,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 915 transitions, 21002 flow, removed 102 selfloop flow, removed 6 redundant places. [2024-06-27 23:59:18,019 INFO L231 Difference]: Finished difference. Result has 508 places, 897 transitions, 19061 flow [2024-06-27 23:59:18,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=18199, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=881, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=704, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=19061, PETRI_PLACES=508, PETRI_TRANSITIONS=897} [2024-06-27 23:59:18,019 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 465 predicate places. [2024-06-27 23:59:18,019 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 897 transitions, 19061 flow [2024-06-27 23:59:18,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:18,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:59:18,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:59:18,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 23:59:18,020 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:59:18,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:59:18,021 INFO L85 PathProgramCache]: Analyzing trace with hash -313268382, now seen corresponding path program 5 times [2024-06-27 23:59:18,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:59:18,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627297806] [2024-06-27 23:59:18,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:59:18,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:59:18,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:59:19,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:59:19,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:59:19,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627297806] [2024-06-27 23:59:19,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627297806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:59:19,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:59:19,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:59:19,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772225] [2024-06-27 23:59:19,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:59:19,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:59:19,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:59:19,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:59:19,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:59:19,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:59:19,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 897 transitions, 19061 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:19,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:59:19,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:59:19,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:59:22,697 INFO L124 PetriNetUnfolderBase]: 5234/7912 cut-off events. [2024-06-27 23:59:22,697 INFO L125 PetriNetUnfolderBase]: For 2226268/2226272 co-relation queries the response was YES. [2024-06-27 23:59:22,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95778 conditions, 7912 events. 5234/7912 cut-off events. For 2226268/2226272 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 45136 event pairs, 1666 based on Foata normal form. 6/7917 useless extension candidates. Maximal degree in co-relation 95523. Up to 7378 conditions per place. [2024-06-27 23:59:22,917 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 736 selfloop transitions, 177 changer transitions 0/916 dead transitions. [2024-06-27 23:59:22,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 916 transitions, 21551 flow [2024-06-27 23:59:22,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:59:22,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:59:22,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-27 23:59:22,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-27 23:59:22,919 INFO L175 Difference]: Start difference. First operand has 508 places, 897 transitions, 19061 flow. Second operand 9 states and 146 transitions. [2024-06-27 23:59:22,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 916 transitions, 21551 flow [2024-06-27 23:59:31,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 916 transitions, 21316 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-27 23:59:31,606 INFO L231 Difference]: Finished difference. Result has 513 places, 901 transitions, 19309 flow [2024-06-27 23:59:31,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=18833, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=897, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=723, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=19309, PETRI_PLACES=513, PETRI_TRANSITIONS=901} [2024-06-27 23:59:31,606 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 470 predicate places. [2024-06-27 23:59:31,606 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 901 transitions, 19309 flow [2024-06-27 23:59:31,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:31,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:59:31,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:59:31,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 23:59:31,607 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:59:31,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:59:31,607 INFO L85 PathProgramCache]: Analyzing trace with hash -313505532, now seen corresponding path program 6 times [2024-06-27 23:59:31,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:59:31,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613452409] [2024-06-27 23:59:31,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:59:31,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:59:31,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:59:33,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:59:33,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:59:33,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613452409] [2024-06-27 23:59:33,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613452409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:59:33,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:59:33,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:59:33,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052203534] [2024-06-27 23:59:33,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:59:33,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:59:33,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:59:33,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:59:33,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:59:33,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:59:33,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 901 transitions, 19309 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:33,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:59:33,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:59:33,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:59:36,178 INFO L124 PetriNetUnfolderBase]: 5228/7904 cut-off events. [2024-06-27 23:59:36,178 INFO L125 PetriNetUnfolderBase]: For 2244417/2244421 co-relation queries the response was YES. [2024-06-27 23:59:36,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95754 conditions, 7904 events. 5228/7904 cut-off events. For 2244417/2244421 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 45114 event pairs, 1666 based on Foata normal form. 6/7909 useless extension candidates. Maximal degree in co-relation 95498. Up to 7373 conditions per place. [2024-06-27 23:59:36,326 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 737 selfloop transitions, 176 changer transitions 0/916 dead transitions. [2024-06-27 23:59:36,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 916 transitions, 21695 flow [2024-06-27 23:59:36,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:59:36,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:59:36,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 23:59:36,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-27 23:59:36,328 INFO L175 Difference]: Start difference. First operand has 513 places, 901 transitions, 19309 flow. Second operand 8 states and 139 transitions. [2024-06-27 23:59:36,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 916 transitions, 21695 flow [2024-06-27 23:59:44,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 916 transitions, 21399 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 23:59:44,036 INFO L231 Difference]: Finished difference. Result has 515 places, 901 transitions, 19377 flow [2024-06-27 23:59:44,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=19013, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=901, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=725, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=19377, PETRI_PLACES=515, PETRI_TRANSITIONS=901} [2024-06-27 23:59:44,037 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 472 predicate places. [2024-06-27 23:59:44,037 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 901 transitions, 19377 flow [2024-06-27 23:59:44,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:44,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:59:44,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:59:44,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 23:59:44,037 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:59:44,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:59:44,038 INFO L85 PathProgramCache]: Analyzing trace with hash 566363924, now seen corresponding path program 6 times [2024-06-27 23:59:44,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:59:44,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44177104] [2024-06-27 23:59:44,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:59:44,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:59:44,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:59:45,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:59:45,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:59:45,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44177104] [2024-06-27 23:59:45,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44177104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:59:45,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:59:45,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:59:45,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174330963] [2024-06-27 23:59:45,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:59:45,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:59:45,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:59:45,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:59:45,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:59:45,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:59:45,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 901 transitions, 19377 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:45,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:59:45,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:59:45,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:59:48,488 INFO L124 PetriNetUnfolderBase]: 5164/7860 cut-off events. [2024-06-27 23:59:48,488 INFO L125 PetriNetUnfolderBase]: For 2336083/2336083 co-relation queries the response was YES. [2024-06-27 23:59:48,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96645 conditions, 7860 events. 5164/7860 cut-off events. For 2336083/2336083 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 45482 event pairs, 1600 based on Foata normal form. 4/7857 useless extension candidates. Maximal degree in co-relation 96388. Up to 6610 conditions per place. [2024-06-27 23:59:48,646 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 654 selfloop transitions, 220 changer transitions 0/935 dead transitions. [2024-06-27 23:59:48,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 935 transitions, 22106 flow [2024-06-27 23:59:48,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:59:48,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:59:48,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 23:59:48,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-27 23:59:48,648 INFO L175 Difference]: Start difference. First operand has 515 places, 901 transitions, 19377 flow. Second operand 9 states and 157 transitions. [2024-06-27 23:59:48,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 935 transitions, 22106 flow [2024-06-27 23:59:56,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 935 transitions, 21823 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 23:59:56,557 INFO L231 Difference]: Finished difference. Result has 519 places, 912 transitions, 19841 flow [2024-06-27 23:59:56,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=19094, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=901, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=691, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=19841, PETRI_PLACES=519, PETRI_TRANSITIONS=912} [2024-06-27 23:59:56,558 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 476 predicate places. [2024-06-27 23:59:56,558 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 912 transitions, 19841 flow [2024-06-27 23:59:56,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:56,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:59:56,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:59:56,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 23:59:56,558 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:59:56,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:59:56,559 INFO L85 PathProgramCache]: Analyzing trace with hash 279364374, now seen corresponding path program 6 times [2024-06-27 23:59:56,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:59:56,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529002229] [2024-06-27 23:59:56,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:59:56,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:59:56,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:59:58,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:59:58,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:59:58,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529002229] [2024-06-27 23:59:58,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529002229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:59:58,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:59:58,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:59:58,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428660270] [2024-06-27 23:59:58,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:59:58,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:59:58,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:59:58,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:59:58,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:59:58,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:59:58,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 912 transitions, 19841 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:58,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:59:58,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:59:58,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:00:01,322 INFO L124 PetriNetUnfolderBase]: 5463/8231 cut-off events. [2024-06-28 00:00:01,323 INFO L125 PetriNetUnfolderBase]: For 2494517/2494521 co-relation queries the response was YES. [2024-06-28 00:00:01,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101623 conditions, 8231 events. 5463/8231 cut-off events. For 2494517/2494521 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 47074 event pairs, 1701 based on Foata normal form. 10/8240 useless extension candidates. Maximal degree in co-relation 101365. Up to 7325 conditions per place. [2024-06-28 00:00:01,505 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 736 selfloop transitions, 240 changer transitions 0/979 dead transitions. [2024-06-28 00:00:01,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 979 transitions, 23154 flow [2024-06-28 00:00:01,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:00:01,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:00:01,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-28 00:00:01,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-28 00:00:01,507 INFO L175 Difference]: Start difference. First operand has 519 places, 912 transitions, 19841 flow. Second operand 9 states and 164 transitions. [2024-06-28 00:00:01,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 979 transitions, 23154 flow [2024-06-28 00:00:13,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 979 transitions, 22855 flow, removed 66 selfloop flow, removed 4 redundant places. [2024-06-28 00:00:13,372 INFO L231 Difference]: Finished difference. Result has 526 places, 948 transitions, 21019 flow [2024-06-28 00:00:13,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=19542, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=912, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=682, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=21019, PETRI_PLACES=526, PETRI_TRANSITIONS=948} [2024-06-28 00:00:13,373 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 483 predicate places. [2024-06-28 00:00:13,373 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 948 transitions, 21019 flow [2024-06-28 00:00:13,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:00:13,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:00:13,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:00:13,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-28 00:00:13,374 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:00:13,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:00:13,374 INFO L85 PathProgramCache]: Analyzing trace with hash 566251704, now seen corresponding path program 7 times [2024-06-28 00:00:13,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:00:13,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307445459] [2024-06-28 00:00:13,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:00:13,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:00:13,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:00:15,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:00:15,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:00:15,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307445459] [2024-06-28 00:00:15,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307445459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:00:15,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:00:15,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:00:15,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586444640] [2024-06-28 00:00:15,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:00:15,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:00:15,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:00:15,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:00:15,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:00:15,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:00:15,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 948 transitions, 21019 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:00:15,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:00:15,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:00:15,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15