./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix052_power.oepc_power.opt_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/mix052_power.oepc_power.opt_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/mix052_power.oepc_power.opt_pso.oepc_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix052_power.oepc_power.opt_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 23:55:13,923 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 23:55:13,988 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 23:55:13,992 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 23:55:13,993 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 23:55:14,017 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 23:55:14,018 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 23:55:14,019 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 23:55:14,019 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 23:55:14,024 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 23:55:14,024 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 23:55:14,025 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 23:55:14,026 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 23:55:14,027 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 23:55:14,028 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 23:55:14,028 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 23:55:14,028 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 23:55:14,028 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 23:55:14,029 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 23:55:14,029 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 23:55:14,029 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 23:55:14,030 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 23:55:14,030 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 23:55:14,030 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 23:55:14,030 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 23:55:14,031 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 23:55:14,031 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 23:55:14,031 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 23:55:14,032 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 23:55:14,032 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 23:55:14,033 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 23:55:14,033 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 23:55:14,033 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 23:55:14,033 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 23:55:14,034 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 23:55:14,034 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 23:55:14,034 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 23:55:14,034 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 23:55:14,035 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 23:55:14,035 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 23:55:14,035 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 23:55:14,035 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 23:55:14,035 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 23:55:14,036 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 23:55:14,250 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 23:55:14,271 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 23:55:14,273 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 23:55:14,274 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 23:55:14,275 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 23:55:14,275 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix052_power.oepc_power.opt_pso.oepc_rmo.oepc.i [2024-06-27 23:55:15,330 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 23:55:15,534 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 23:55:15,534 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix052_power.oepc_power.opt_pso.oepc_rmo.oepc.i [2024-06-27 23:55:15,545 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9899bc51f/951e734d51a14e16bec6c32b08827347/FLAG737f09d0b [2024-06-27 23:55:15,555 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9899bc51f/951e734d51a14e16bec6c32b08827347 [2024-06-27 23:55:15,557 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 23:55:15,557 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 23:55:15,558 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix052_power.oepc_power.opt_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-27 23:55:15,638 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 23:55:15,640 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 23:55:15,641 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 23:55:15,642 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 23:55:15,645 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 23:55:15,646 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 11:55:15" (1/2) ... [2024-06-27 23:55:15,647 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@333728f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:55:15, skipping insertion in model container [2024-06-27 23:55:15,647 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 11:55:15" (1/2) ... [2024-06-27 23:55:15,649 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@fc0956 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:55:15, skipping insertion in model container [2024-06-27 23:55:15,650 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:55:15" (2/2) ... [2024-06-27 23:55:15,650 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@333728f2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:55:15, skipping insertion in model container [2024-06-27 23:55:15,651 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:55:15" (2/2) ... [2024-06-27 23:55:15,651 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 23:55:15,675 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 23:55:15,676 INFO L97 edCorrectnessWitness]: Location invariant before [L838-L838] ! 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_EAX) + (long long )z$mem_tmp >= 0LL) && (0LL - (long long )z$flush_delayed) + (long long )z$r_buff0_thd1 >= 0LL) && (0LL - (long long )z$flush_delayed) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$flush_delayed) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff0_thd0) + (long long )z$r_buff0_thd1 >= 0LL) && (0LL - (long long )z$r_buff0_thd0) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd0) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff0_thd1) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd2) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd2) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff0_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd3) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff1_thd0) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd0) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff1_thd1) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd1) + (long long )z$w_buff1 >= 0LL) && (0LL - (long long )z$r_buff1_thd2) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd2) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$read_delayed) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$read_delayed) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$r_buff0_thd1) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$r_buff1_thd1) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$w_buff0) + (long long )z$w_buff0_used >= 0LL) && (long long )__unbuffered_cnt + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_cnt + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_cnt + (long long )z$w_buff0_used >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z$w_buff0_used >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z$w_buff0_used >= 0LL) && (long long )main$tmp_guard1 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )main$tmp_guard1 + (long long )z$w_buff0 >= 0LL) && (long long )main$tmp_guard1 + (long long )z$w_buff0_used >= 0LL) && (long long )x + (long long )z$r_buff0_thd1 >= 0LL) && (long long )x + (long long )z$w_buff0 >= 0LL) && (long long )x + (long long )z$w_buff0_used >= 0LL) && (long long )y + (long long )z$r_buff0_thd1 >= 0LL) && (long long )y + (long long )z$w_buff0 >= 0LL) && (long long )y + (long long )z$w_buff0_used >= 0LL) && (long long )z + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z + (long long )z$w_buff0 >= 0LL) && (long long )z + (long long )z$w_buff0_used >= 0LL) && (long long )z$flush_delayed + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z$flush_delayed + (long long )z$w_buff0 >= 0LL) && (long long )z$flush_delayed + (long long )z$w_buff0_used >= 0LL) && (long long )z$mem_tmp + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z$mem_tmp + (long long )z$w_buff0 >= 0LL) && (long long )z$mem_tmp + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd0 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z$r_buff0_thd0 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd0 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff0_thd2 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff0_thd3 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd0 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd1 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd2 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd3 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$read_delayed >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff1 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff1_used >= 0LL) && (long long )z$r_buff0_thd2 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd2 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd3 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd3 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd0 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd0 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd1 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd1 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd2 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd2 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd3 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd3 + (long long )z$w_buff0_used >= 0LL) && (long long )z$read_delayed + (long long )z$w_buff0 >= 0LL) && (long long )z$read_delayed + (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 + (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 + (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0 + (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff0_used + (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0_used + (long long )z$w_buff1_used >= 0LL) && (long long )weak$$choice0 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )weak$$choice0 + (long long )z$w_buff0 >= 0LL) && (long long )weak$$choice0 + (long long )z$w_buff0_used >= 0LL) && (long long )weak$$choice2 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )weak$$choice2 + (long long )z$w_buff0 >= 0LL) && (long long )weak$$choice2 + (long long )z$w_buff0_used >= 0LL) && (1LL + (long long )z$w_buff0_used) - (long long )z$w_buff1 >= 0LL) && (long long )__unbuffered_p2_EAX - (long long )z$mem_tmp >= 0LL) && (long long )z - (long long )z$mem_tmp >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff0_thd2 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff0_thd3 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd0 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd1 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd2 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd3 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$read_delayed >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$w_buff1 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$w_buff1_used >= 0LL) && (long long )z$r_buff1_thd1 - (long long )z$w_buff1 >= 0LL) && (long long )z$r_buff1_thd1 - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff0_used - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff1 - (long long )z$w_buff1_used >= 0LL) [2024-06-27 23:55:15,677 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )z >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )z$mem_tmp >= 0LL) && (0LL - (long long )z$flush_delayed) + (long long )z$r_buff0_thd1 >= 0LL) && (0LL - (long long )z$flush_delayed) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$flush_delayed) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff0_thd0) + (long long )z$r_buff0_thd1 >= 0LL) && (0LL - (long long )z$r_buff0_thd0) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd0) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff0_thd1) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd2) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd2) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff0_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd3) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff1_thd0) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd0) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff1_thd1) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd1) + (long long )z$w_buff1 >= 0LL) && (0LL - (long long )z$r_buff1_thd2) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd2) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$read_delayed) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$read_delayed) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$r_buff0_thd1) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$r_buff1_thd1) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$w_buff0) + (long long )z$w_buff0_used >= 0LL) && (long long )__unbuffered_cnt + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_cnt + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_cnt + (long long )z$w_buff0_used >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z$w_buff0_used >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z$w_buff0_used >= 0LL) && (long long )main$tmp_guard1 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )main$tmp_guard1 + (long long )z$w_buff0 >= 0LL) && (long long )main$tmp_guard1 + (long long )z$w_buff0_used >= 0LL) && (long long )x + (long long )z$r_buff0_thd1 >= 0LL) && (long long )x + (long long )z$w_buff0 >= 0LL) && (long long )x + (long long )z$w_buff0_used >= 0LL) && (long long )y + (long long )z$r_buff0_thd1 >= 0LL) && (long long )y + (long long )z$w_buff0 >= 0LL) && (long long )y + (long long )z$w_buff0_used >= 0LL) && (long long )z + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z + (long long )z$w_buff0 >= 0LL) && (long long )z + (long long )z$w_buff0_used >= 0LL) && (long long )z$flush_delayed + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z$flush_delayed + (long long )z$w_buff0 >= 0LL) && (long long )z$flush_delayed + (long long )z$w_buff0_used >= 0LL) && (long long )z$mem_tmp + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z$mem_tmp + (long long )z$w_buff0 >= 0LL) && (long long )z$mem_tmp + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd0 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z$r_buff0_thd0 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd0 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff0_thd2 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff0_thd3 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd0 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd1 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd2 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd3 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$read_delayed >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff1 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff1_used >= 0LL) && (long long )z$r_buff0_thd2 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd2 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd3 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd3 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd0 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd0 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd1 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd1 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd2 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd2 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd3 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd3 + (long long )z$w_buff0_used >= 0LL) && (long long )z$read_delayed + (long long )z$w_buff0 >= 0LL) && (long long )z$read_delayed + (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 + (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 + (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0 + (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff0_used + (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0_used + (long long )z$w_buff1_used >= 0LL) && (long long )weak$$choice0 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )weak$$choice0 + (long long )z$w_buff0 >= 0LL) && (long long )weak$$choice0 + (long long )z$w_buff0_used >= 0LL) && (long long )weak$$choice2 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )weak$$choice2 + (long long )z$w_buff0 >= 0LL) && (long long )weak$$choice2 + (long long )z$w_buff0_used >= 0LL) && (1LL + (long long )z$w_buff0_used) - (long long )z$w_buff1 >= 0LL) && (long long )__unbuffered_p2_EAX - (long long )z$mem_tmp >= 0LL) && (long long )z - (long long )z$mem_tmp >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff0_thd2 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff0_thd3 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd0 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd1 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd2 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd3 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$read_delayed >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$w_buff1 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$w_buff1_used >= 0LL) && (long long )z$r_buff1_thd1 - (long long )z$w_buff1 >= 0LL) && (long long )z$r_buff1_thd1 - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff0_used - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff1 - (long long )z$w_buff1_used >= 0LL) [2024-06-27 23:55:15,677 INFO L97 edCorrectnessWitness]: Location invariant before [L836-L836] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )z >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )z$mem_tmp >= 0LL) && (0LL - (long long )z$flush_delayed) + (long long )z$r_buff0_thd1 >= 0LL) && (0LL - (long long )z$flush_delayed) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$flush_delayed) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff0_thd0) + (long long )z$r_buff0_thd1 >= 0LL) && (0LL - (long long )z$r_buff0_thd0) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd0) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff0_thd1) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd2) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd2) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff0_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd3) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff1_thd0) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd0) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff1_thd1) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd1) + (long long )z$w_buff1 >= 0LL) && (0LL - (long long )z$r_buff1_thd2) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd2) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$read_delayed) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$read_delayed) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$r_buff0_thd1) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$r_buff1_thd1) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$w_buff0) + (long long )z$w_buff0_used >= 0LL) && (long long )__unbuffered_cnt + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_cnt + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_cnt + (long long )z$w_buff0_used >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z$w_buff0_used >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z$w_buff0_used >= 0LL) && (long long )main$tmp_guard1 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )main$tmp_guard1 + (long long )z$w_buff0 >= 0LL) && (long long )main$tmp_guard1 + (long long )z$w_buff0_used >= 0LL) && (long long )x + (long long )z$r_buff0_thd1 >= 0LL) && (long long )x + (long long )z$w_buff0 >= 0LL) && (long long )x + (long long )z$w_buff0_used >= 0LL) && (long long )y + (long long )z$r_buff0_thd1 >= 0LL) && (long long )y + (long long )z$w_buff0 >= 0LL) && (long long )y + (long long )z$w_buff0_used >= 0LL) && (long long )z + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z + (long long )z$w_buff0 >= 0LL) && (long long )z + (long long )z$w_buff0_used >= 0LL) && (long long )z$flush_delayed + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z$flush_delayed + (long long )z$w_buff0 >= 0LL) && (long long )z$flush_delayed + (long long )z$w_buff0_used >= 0LL) && (long long )z$mem_tmp + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z$mem_tmp + (long long )z$w_buff0 >= 0LL) && (long long )z$mem_tmp + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd0 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z$r_buff0_thd0 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd0 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff0_thd2 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff0_thd3 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd0 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd1 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd2 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd3 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$read_delayed >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff1 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff1_used >= 0LL) && (long long )z$r_buff0_thd2 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd2 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd3 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd3 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd0 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd0 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd1 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd1 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd2 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd2 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd3 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd3 + (long long )z$w_buff0_used >= 0LL) && (long long )z$read_delayed + (long long )z$w_buff0 >= 0LL) && (long long )z$read_delayed + (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 + (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 + (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0 + (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff0_used + (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0_used + (long long )z$w_buff1_used >= 0LL) && (long long )weak$$choice0 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )weak$$choice0 + (long long )z$w_buff0 >= 0LL) && (long long )weak$$choice0 + (long long )z$w_buff0_used >= 0LL) && (long long )weak$$choice2 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )weak$$choice2 + (long long )z$w_buff0 >= 0LL) && (long long )weak$$choice2 + (long long )z$w_buff0_used >= 0LL) && (1LL + (long long )z$w_buff0_used) - (long long )z$w_buff1 >= 0LL) && (long long )__unbuffered_p2_EAX - (long long )z$mem_tmp >= 0LL) && (long long )z - (long long )z$mem_tmp >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff0_thd2 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff0_thd3 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd0 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd1 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd2 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd3 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$read_delayed >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$w_buff1 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$w_buff1_used >= 0LL) && (long long )z$r_buff1_thd1 - (long long )z$w_buff1 >= 0LL) && (long long )z$r_buff1_thd1 - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff0_used - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff1 - (long long )z$w_buff1_used >= 0LL) [2024-06-27 23:55:15,677 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 23:55:15,677 INFO L106 edCorrectnessWitness]: ghost_update [L834-L834] multithreaded = 1; [2024-06-27 23:55:15,718 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 23:55:16,059 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 23:55:16,071 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 23:55:16,280 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 23:55:16,360 INFO L206 MainTranslator]: Completed translation [2024-06-27 23:55:16,361 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:55:16 WrapperNode [2024-06-27 23:55:16,372 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 23:55:16,374 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 23:55:16,374 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 23:55:16,374 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 23:55:16,380 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:55:16" (1/1) ... [2024-06-27 23:55:16,398 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:55:16" (1/1) ... [2024-06-27 23:55:16,463 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 125 [2024-06-27 23:55:16,463 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 23:55:16,464 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 23:55:16,464 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 23:55:16,464 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 23:55:16,473 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:55:16" (1/1) ... [2024-06-27 23:55:16,473 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:55:16" (1/1) ... [2024-06-27 23:55:16,485 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:55:16" (1/1) ... [2024-06-27 23:55:16,533 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 23:55:16,533 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:55:16" (1/1) ... [2024-06-27 23:55:16,533 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:55:16" (1/1) ... [2024-06-27 23:55:16,558 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:55:16" (1/1) ... [2024-06-27 23:55:16,560 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:55:16" (1/1) ... [2024-06-27 23:55:16,564 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:55:16" (1/1) ... [2024-06-27 23:55:16,572 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:55:16" (1/1) ... [2024-06-27 23:55:16,578 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 23:55:16,579 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 23:55:16,580 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 23:55:16,580 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 23:55:16,580 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:55:16" (1/1) ... [2024-06-27 23:55:16,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 23:55:16,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 23:55:16,626 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 23:55:16,672 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 23:55:16,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 23:55:16,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 23:55:16,690 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 23:55:16,690 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 23:55:16,690 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 23:55:16,690 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 23:55:16,690 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 23:55:16,691 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 23:55:16,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 23:55:16,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 23:55:16,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 23:55:16,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 23:55:16,694 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 23:55:16,820 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 23:55:16,822 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 23:55:17,380 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 23:55:17,381 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 23:55:17,480 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 23:55:17,481 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 23:55:17,481 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 11:55:17 BoogieIcfgContainer [2024-06-27 23:55:17,481 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 23:55:17,483 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 23:55:17,483 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 23:55:17,486 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 23:55:17,486 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 11:55:15" (1/4) ... [2024-06-27 23:55:17,486 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f5ba62f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 11:55:17, skipping insertion in model container [2024-06-27 23:55:17,487 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:55:15" (2/4) ... [2024-06-27 23:55:17,487 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f5ba62f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 11:55:17, skipping insertion in model container [2024-06-27 23:55:17,487 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:55:16" (3/4) ... [2024-06-27 23:55:17,489 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f5ba62f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 11:55:17, skipping insertion in model container [2024-06-27 23:55:17,489 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 11:55:17" (4/4) ... [2024-06-27 23:55:17,490 INFO L112 eAbstractionObserver]: Analyzing ICFG mix052_power.oepc_power.opt_pso.oepc_rmo.oepc.i [2024-06-27 23:55:17,502 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 23:55:17,502 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 23:55:17,502 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 23:55:17,570 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 23:55:17,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-27 23:55:17,612 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-27 23:55:17,612 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 23:55:17,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 58 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 23:55:17,614 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-27 23:55:17,615 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-27 23:55:17,622 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 23:55:17,626 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;@13227c7e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 23:55:17,626 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 23:55:17,629 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 23:55:17,629 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 23:55:17,629 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 23:55:17,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:17,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 23:55:17,630 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 23:55:17,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:17,633 INFO L85 PathProgramCache]: Analyzing trace with hash 366539877, now seen corresponding path program 1 times [2024-06-27 23:55:17,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:17,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007646208] [2024-06-27 23:55:17,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:17,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:17,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:18,924 INFO 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 23:55:18,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:18,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007646208] [2024-06-27 23:55:18,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007646208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:18,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:18,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 23:55:18,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367700370] [2024-06-27 23:55:18,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:18,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 23:55:18,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:18,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 23:55:18,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 23:55:19,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-27 23:55:19,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:19,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:19,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-27 23:55:19,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:19,406 INFO L124 PetriNetUnfolderBase]: 1363/2074 cut-off events. [2024-06-27 23:55:19,406 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-06-27 23:55:19,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4198 conditions, 2074 events. 1363/2074 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9696 event pairs, 964 based on Foata normal form. 1/2036 useless extension candidates. Maximal degree in co-relation 4186. Up to 2037 conditions per place. [2024-06-27 23:55:19,418 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 32 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-27 23:55:19,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 169 flow [2024-06-27 23:55:19,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 23:55:19,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 23:55:19,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-27 23:55:19,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 23:55:19,428 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 72 transitions. [2024-06-27 23:55:19,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 169 flow [2024-06-27 23:55:19,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 164 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 23:55:19,432 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-27 23:55:19,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-27 23:55:19,435 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-27 23:55:19,435 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-27 23:55:19,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:19,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:19,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:19,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 23:55:19,436 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 23:55:19,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:19,436 INFO L85 PathProgramCache]: Analyzing trace with hash 58400200, now seen corresponding path program 1 times [2024-06-27 23:55:19,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:19,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072251812] [2024-06-27 23:55:19,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:19,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:19,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:20,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:55:20,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:20,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072251812] [2024-06-27 23:55:20,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072251812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:20,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:20,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 23:55:20,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953636291] [2024-06-27 23:55:20,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:20,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 23:55:20,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:20,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 23:55:20,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 23:55:20,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-27 23:55:20,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:20,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:20,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-27 23:55:20,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:20,833 INFO L124 PetriNetUnfolderBase]: 1357/2070 cut-off events. [2024-06-27 23:55:20,834 INFO L125 PetriNetUnfolderBase]: For 393/393 co-relation queries the response was YES. [2024-06-27 23:55:20,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4737 conditions, 2070 events. 1357/2070 cut-off events. For 393/393 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9665 event pairs, 840 based on Foata normal form. 3/2073 useless extension candidates. Maximal degree in co-relation 4725. Up to 2013 conditions per place. [2024-06-27 23:55:20,847 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 39 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2024-06-27 23:55:20,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 236 flow [2024-06-27 23:55:20,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 23:55:20,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 23:55:20,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-06-27 23:55:20,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-27 23:55:20,852 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 93 transitions. [2024-06-27 23:55:20,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 236 flow [2024-06-27 23:55:20,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 51 transitions, 232 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 23:55:20,856 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 134 flow [2024-06-27 23:55:20,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-27 23:55:20,857 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2024-06-27 23:55:20,857 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 134 flow [2024-06-27 23:55:20,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:20,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:20,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:20,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 23:55:20,861 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 23:55:20,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:20,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1810407254, now seen corresponding path program 1 times [2024-06-27 23:55:20,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:20,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649731304] [2024-06-27 23:55:20,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:20,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:20,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:21,841 INFO 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 23:55:21,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:21,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649731304] [2024-06-27 23:55:21,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649731304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:21,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:21,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:55:21,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684524877] [2024-06-27 23:55:21,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:21,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:55:21,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:21,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:55:21,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:55:21,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-27 23:55:21,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 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 23:55:21,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:21,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-27 23:55:21,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:22,266 INFO L124 PetriNetUnfolderBase]: 1411/2146 cut-off events. [2024-06-27 23:55:22,266 INFO L125 PetriNetUnfolderBase]: For 1163/1163 co-relation queries the response was YES. [2024-06-27 23:55:22,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5474 conditions, 2146 events. 1411/2146 cut-off events. For 1163/1163 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10031 event pairs, 629 based on Foata normal form. 7/2152 useless extension candidates. Maximal degree in co-relation 5460. Up to 1982 conditions per place. [2024-06-27 23:55:22,277 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 54 selfloop transitions, 16 changer transitions 0/75 dead transitions. [2024-06-27 23:55:22,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 75 transitions, 398 flow [2024-06-27 23:55:22,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:55:22,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:55:22,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-27 23:55:22,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-27 23:55:22,279 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 134 flow. Second operand 5 states and 124 transitions. [2024-06-27 23:55:22,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 75 transitions, 398 flow [2024-06-27 23:55:22,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 75 transitions, 384 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 23:55:22,281 INFO L231 Difference]: Finished difference. Result has 49 places, 48 transitions, 235 flow [2024-06-27 23:55:22,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=235, PETRI_PLACES=49, PETRI_TRANSITIONS=48} [2024-06-27 23:55:22,282 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2024-06-27 23:55:22,282 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 48 transitions, 235 flow [2024-06-27 23:55:22,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 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 23:55:22,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:22,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:22,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 23:55:22,282 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 23:55:22,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:22,283 INFO L85 PathProgramCache]: Analyzing trace with hash -543117789, now seen corresponding path program 1 times [2024-06-27 23:55:22,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:22,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883228505] [2024-06-27 23:55:22,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:22,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:22,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:23,364 INFO 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 23:55:23,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:23,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883228505] [2024-06-27 23:55:23,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883228505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:23,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:23,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:55:23,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172850672] [2024-06-27 23:55:23,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:23,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:55:23,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:23,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:55:23,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:55:23,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-27 23:55:23,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 48 transitions, 235 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:23,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:23,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-27 23:55:23,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:23,914 INFO L124 PetriNetUnfolderBase]: 1433/2180 cut-off events. [2024-06-27 23:55:23,914 INFO L125 PetriNetUnfolderBase]: For 2845/2845 co-relation queries the response was YES. [2024-06-27 23:55:23,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6745 conditions, 2180 events. 1433/2180 cut-off events. For 2845/2845 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10319 event pairs, 476 based on Foata normal form. 7/2186 useless extension candidates. Maximal degree in co-relation 6728. Up to 1925 conditions per place. [2024-06-27 23:55:23,926 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 65 selfloop transitions, 28 changer transitions 0/98 dead transitions. [2024-06-27 23:55:23,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 98 transitions, 627 flow [2024-06-27 23:55:23,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:55:23,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:55:23,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 23:55:23,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 23:55:23,928 INFO L175 Difference]: Start difference. First operand has 49 places, 48 transitions, 235 flow. Second operand 6 states and 150 transitions. [2024-06-27 23:55:23,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 98 transitions, 627 flow [2024-06-27 23:55:23,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 98 transitions, 619 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-27 23:55:23,932 INFO L231 Difference]: Finished difference. Result has 58 places, 61 transitions, 414 flow [2024-06-27 23:55:23,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=414, PETRI_PLACES=58, PETRI_TRANSITIONS=61} [2024-06-27 23:55:23,933 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 17 predicate places. [2024-06-27 23:55:23,933 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 61 transitions, 414 flow [2024-06-27 23:55:23,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:23,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:23,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:23,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 23:55:23,934 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 23:55:23,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:23,934 INFO L85 PathProgramCache]: Analyzing trace with hash 343218841, now seen corresponding path program 1 times [2024-06-27 23:55:23,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:23,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363216669] [2024-06-27 23:55:23,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:23,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:23,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:25,007 INFO 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 23:55:25,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:25,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363216669] [2024-06-27 23:55:25,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363216669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:25,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:25,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:55:25,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591814439] [2024-06-27 23:55:25,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:25,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:55:25,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:25,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:55:25,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:55:25,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-27 23:55:25,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 61 transitions, 414 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 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 23:55:25,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:25,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-27 23:55:25,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:25,697 INFO L124 PetriNetUnfolderBase]: 1515/2326 cut-off events. [2024-06-27 23:55:25,697 INFO L125 PetriNetUnfolderBase]: For 5688/5688 co-relation queries the response was YES. [2024-06-27 23:55:25,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8456 conditions, 2326 events. 1515/2326 cut-off events. For 5688/5688 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 11358 event pairs, 348 based on Foata normal form. 26/2351 useless extension candidates. Maximal degree in co-relation 8433. Up to 1889 conditions per place. [2024-06-27 23:55:25,714 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 73 selfloop transitions, 30 changer transitions 0/108 dead transitions. [2024-06-27 23:55:25,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 108 transitions, 802 flow [2024-06-27 23:55:25,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:55:25,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:55:25,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 23:55:25,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-27 23:55:25,717 INFO L175 Difference]: Start difference. First operand has 58 places, 61 transitions, 414 flow. Second operand 7 states and 171 transitions. [2024-06-27 23:55:25,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 108 transitions, 802 flow [2024-06-27 23:55:25,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 108 transitions, 786 flow, removed 8 selfloop flow, removed 0 redundant places. [2024-06-27 23:55:25,730 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 480 flow [2024-06-27 23:55:25,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=480, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2024-06-27 23:55:25,732 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 23 predicate places. [2024-06-27 23:55:25,732 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 480 flow [2024-06-27 23:55:25,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 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 23:55:25,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:25,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:25,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 23:55:25,736 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 23:55:25,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:25,737 INFO L85 PathProgramCache]: Analyzing trace with hash -212618023, now seen corresponding path program 1 times [2024-06-27 23:55:25,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:25,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611426988] [2024-06-27 23:55:25,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:25,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:25,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:26,938 INFO 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 23:55:26,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:26,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611426988] [2024-06-27 23:55:26,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611426988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:26,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:26,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:55:26,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140592875] [2024-06-27 23:55:26,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:26,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:55:26,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:26,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:55:26,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:55:26,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 23:55:26,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 480 flow. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:26,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:26,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 23:55:26,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:27,498 INFO L124 PetriNetUnfolderBase]: 1505/2322 cut-off events. [2024-06-27 23:55:27,499 INFO L125 PetriNetUnfolderBase]: For 7829/7829 co-relation queries the response was YES. [2024-06-27 23:55:27,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8893 conditions, 2322 events. 1505/2322 cut-off events. For 7829/7829 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 11502 event pairs, 816 based on Foata normal form. 4/2323 useless extension candidates. Maximal degree in co-relation 8866. Up to 2254 conditions per place. [2024-06-27 23:55:27,517 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 58 selfloop transitions, 12 changer transitions 0/74 dead transitions. [2024-06-27 23:55:27,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 74 transitions, 664 flow [2024-06-27 23:55:27,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:55:27,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:55:27,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-27 23:55:27,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-06-27 23:55:27,518 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 480 flow. Second operand 5 states and 92 transitions. [2024-06-27 23:55:27,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 74 transitions, 664 flow [2024-06-27 23:55:27,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 74 transitions, 592 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 23:55:27,526 INFO L231 Difference]: Finished difference. Result has 65 places, 64 transitions, 467 flow [2024-06-27 23:55:27,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=467, PETRI_PLACES=65, PETRI_TRANSITIONS=64} [2024-06-27 23:55:27,528 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 24 predicate places. [2024-06-27 23:55:27,528 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 64 transitions, 467 flow [2024-06-27 23:55:27,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:27,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:27,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:27,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 23:55:27,528 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 23:55:27,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:27,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1494142630, now seen corresponding path program 1 times [2024-06-27 23:55:27,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:27,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784755015] [2024-06-27 23:55:27,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:27,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:27,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:55:28,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:28,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784755015] [2024-06-27 23:55:28,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784755015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:28,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:28,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:55:28,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908732399] [2024-06-27 23:55:28,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:28,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:55:28,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:28,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:55:28,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:55:28,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 23:55:28,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 64 transitions, 467 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:28,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:28,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 23:55:28,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:29,591 INFO L124 PetriNetUnfolderBase]: 1584/2443 cut-off events. [2024-06-27 23:55:29,591 INFO L125 PetriNetUnfolderBase]: For 8213/8221 co-relation queries the response was YES. [2024-06-27 23:55:29,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9393 conditions, 2443 events. 1584/2443 cut-off events. For 8213/8221 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 11945 event pairs, 485 based on Foata normal form. 12/2454 useless extension candidates. Maximal degree in co-relation 9362. Up to 2257 conditions per place. [2024-06-27 23:55:29,610 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 77 selfloop transitions, 28 changer transitions 0/109 dead transitions. [2024-06-27 23:55:29,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 109 transitions, 957 flow [2024-06-27 23:55:29,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:55:29,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:55:29,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-27 23:55:29,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-27 23:55:29,612 INFO L175 Difference]: Start difference. First operand has 65 places, 64 transitions, 467 flow. Second operand 7 states and 135 transitions. [2024-06-27 23:55:29,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 109 transitions, 957 flow [2024-06-27 23:55:29,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 109 transitions, 934 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 23:55:29,621 INFO L231 Difference]: Finished difference. Result has 71 places, 83 transitions, 700 flow [2024-06-27 23:55:29,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=700, PETRI_PLACES=71, PETRI_TRANSITIONS=83} [2024-06-27 23:55:29,622 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 30 predicate places. [2024-06-27 23:55:29,622 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 83 transitions, 700 flow [2024-06-27 23:55:29,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:29,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:29,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:29,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 23:55:29,622 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 23:55:29,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:29,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1539923350, now seen corresponding path program 2 times [2024-06-27 23:55:29,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:29,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092845499] [2024-06-27 23:55:29,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:29,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:29,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:30,748 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 23:55:30,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:30,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092845499] [2024-06-27 23:55:30,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092845499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:30,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:30,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:55:30,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953032077] [2024-06-27 23:55:30,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:30,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:55:30,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:30,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:55:30,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:55:30,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 23:55:30,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 83 transitions, 700 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:30,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:30,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 23:55:30,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:31,276 INFO L124 PetriNetUnfolderBase]: 1681/2594 cut-off events. [2024-06-27 23:55:31,276 INFO L125 PetriNetUnfolderBase]: For 11451/11451 co-relation queries the response was YES. [2024-06-27 23:55:31,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10981 conditions, 2594 events. 1681/2594 cut-off events. For 11451/11451 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12895 event pairs, 770 based on Foata normal form. 10/2601 useless extension candidates. Maximal degree in co-relation 10947. Up to 2342 conditions per place. [2024-06-27 23:55:31,294 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 86 selfloop transitions, 37 changer transitions 0/127 dead transitions. [2024-06-27 23:55:31,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 127 transitions, 1323 flow [2024-06-27 23:55:31,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:55:31,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:55:31,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-27 23:55:31,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-06-27 23:55:31,297 INFO L175 Difference]: Start difference. First operand has 71 places, 83 transitions, 700 flow. Second operand 6 states and 116 transitions. [2024-06-27 23:55:31,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 127 transitions, 1323 flow [2024-06-27 23:55:31,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 127 transitions, 1286 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-27 23:55:31,312 INFO L231 Difference]: Finished difference. Result has 76 places, 103 transitions, 1056 flow [2024-06-27 23:55:31,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=677, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1056, PETRI_PLACES=76, PETRI_TRANSITIONS=103} [2024-06-27 23:55:31,314 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 35 predicate places. [2024-06-27 23:55:31,314 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 103 transitions, 1056 flow [2024-06-27 23:55:31,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:31,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:31,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:31,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 23:55:31,314 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 23:55:31,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:31,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1832524600, now seen corresponding path program 3 times [2024-06-27 23:55:31,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:31,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377463547] [2024-06-27 23:55:31,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:31,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:31,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:32,322 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 23:55:32,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:32,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377463547] [2024-06-27 23:55:32,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377463547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:32,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:32,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:55:32,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806409455] [2024-06-27 23:55:32,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:32,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:55:32,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:32,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:55:32,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:55:32,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:55:32,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 103 transitions, 1056 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:32,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:32,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:55:32,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:32,956 INFO L124 PetriNetUnfolderBase]: 2105/3186 cut-off events. [2024-06-27 23:55:32,957 INFO L125 PetriNetUnfolderBase]: For 16764/16764 co-relation queries the response was YES. [2024-06-27 23:55:32,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14073 conditions, 3186 events. 2105/3186 cut-off events. For 16764/16764 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15291 event pairs, 1006 based on Foata normal form. 6/3192 useless extension candidates. Maximal degree in co-relation 14036. Up to 3104 conditions per place. [2024-06-27 23:55:32,976 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 105 selfloop transitions, 16 changer transitions 0/124 dead transitions. [2024-06-27 23:55:32,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 124 transitions, 1408 flow [2024-06-27 23:55:32,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:55:32,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:55:32,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-27 23:55:32,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-27 23:55:32,977 INFO L175 Difference]: Start difference. First operand has 76 places, 103 transitions, 1056 flow. Second operand 6 states and 104 transitions. [2024-06-27 23:55:32,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 124 transitions, 1408 flow [2024-06-27 23:55:32,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 124 transitions, 1391 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-27 23:55:32,996 INFO L231 Difference]: Finished difference. Result has 81 places, 109 transitions, 1158 flow [2024-06-27 23:55:32,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1039, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1158, PETRI_PLACES=81, PETRI_TRANSITIONS=109} [2024-06-27 23:55:32,997 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 40 predicate places. [2024-06-27 23:55:32,997 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 109 transitions, 1158 flow [2024-06-27 23:55:32,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:32,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:32,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:32,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 23:55:32,998 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 23:55:32,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:32,998 INFO L85 PathProgramCache]: Analyzing trace with hash 670115814, now seen corresponding path program 1 times [2024-06-27 23:55:32,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:32,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342861327] [2024-06-27 23:55:32,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:32,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:33,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:34,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:55:34,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:34,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342861327] [2024-06-27 23:55:34,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342861327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:34,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:34,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:55:34,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061298483] [2024-06-27 23:55:34,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:34,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:55:34,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:34,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:55:34,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:55:34,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:55:34,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 109 transitions, 1158 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:34,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:34,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:55:34,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:34,972 INFO L124 PetriNetUnfolderBase]: 2096/3169 cut-off events. [2024-06-27 23:55:34,972 INFO L125 PetriNetUnfolderBase]: For 18930/18930 co-relation queries the response was YES. [2024-06-27 23:55:34,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14516 conditions, 3169 events. 2096/3169 cut-off events. For 18930/18930 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15168 event pairs, 1006 based on Foata normal form. 5/3174 useless extension candidates. Maximal degree in co-relation 14476. Up to 3048 conditions per place. [2024-06-27 23:55:35,000 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 113 selfloop transitions, 22 changer transitions 0/138 dead transitions. [2024-06-27 23:55:35,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 138 transitions, 1616 flow [2024-06-27 23:55:35,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:55:35,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:55:35,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 23:55:35,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409375 [2024-06-27 23:55:35,003 INFO L175 Difference]: Start difference. First operand has 81 places, 109 transitions, 1158 flow. Second operand 8 states and 131 transitions. [2024-06-27 23:55:35,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 138 transitions, 1616 flow [2024-06-27 23:55:35,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 138 transitions, 1571 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 23:55:35,028 INFO L231 Difference]: Finished difference. Result has 85 places, 113 transitions, 1233 flow [2024-06-27 23:55:35,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1113, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1233, PETRI_PLACES=85, PETRI_TRANSITIONS=113} [2024-06-27 23:55:35,029 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 44 predicate places. [2024-06-27 23:55:35,029 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 113 transitions, 1233 flow [2024-06-27 23:55:35,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:35,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:35,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:35,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 23:55:35,030 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:55:35,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:35,031 INFO L85 PathProgramCache]: Analyzing trace with hash 669172600, now seen corresponding path program 1 times [2024-06-27 23:55:35,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:35,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096405233] [2024-06-27 23:55:35,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:35,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:35,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:37,333 INFO 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 23:55:37,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:37,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096405233] [2024-06-27 23:55:37,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096405233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:37,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:37,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:55:37,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327147234] [2024-06-27 23:55:37,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:37,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:55:37,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:37,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:55:37,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:55:37,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:55:37,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 113 transitions, 1233 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:37,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:37,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:55:37,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:38,264 INFO L124 PetriNetUnfolderBase]: 2095/3168 cut-off events. [2024-06-27 23:55:38,265 INFO L125 PetriNetUnfolderBase]: For 21094/21094 co-relation queries the response was YES. [2024-06-27 23:55:38,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14747 conditions, 3168 events. 2095/3168 cut-off events. For 21094/21094 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15133 event pairs, 990 based on Foata normal form. 4/3172 useless extension candidates. Maximal degree in co-relation 14706. Up to 3076 conditions per place. [2024-06-27 23:55:38,287 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 117 selfloop transitions, 18 changer transitions 0/138 dead transitions. [2024-06-27 23:55:38,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 138 transitions, 1625 flow [2024-06-27 23:55:38,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:55:38,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:55:38,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 23:55:38,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-27 23:55:38,290 INFO L175 Difference]: Start difference. First operand has 85 places, 113 transitions, 1233 flow. Second operand 8 states and 127 transitions. [2024-06-27 23:55:38,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 138 transitions, 1625 flow [2024-06-27 23:55:38,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 138 transitions, 1577 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 23:55:38,315 INFO L231 Difference]: Finished difference. Result has 89 places, 119 transitions, 1307 flow [2024-06-27 23:55:38,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1193, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1307, PETRI_PLACES=89, PETRI_TRANSITIONS=119} [2024-06-27 23:55:38,316 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 48 predicate places. [2024-06-27 23:55:38,316 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 119 transitions, 1307 flow [2024-06-27 23:55:38,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:38,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:38,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:38,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 23:55:38,317 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:55:38,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:38,317 INFO L85 PathProgramCache]: Analyzing trace with hash 456194483, now seen corresponding path program 1 times [2024-06-27 23:55:38,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:38,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403062955] [2024-06-27 23:55:38,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:38,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:38,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:39,564 INFO 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 23:55:39,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:39,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403062955] [2024-06-27 23:55:39,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403062955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:39,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:39,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:55:39,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142765902] [2024-06-27 23:55:39,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:39,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:55:39,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:39,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:55:39,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:55:39,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:55:39,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 119 transitions, 1307 flow. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:39,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:39,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:55:39,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:40,283 INFO L124 PetriNetUnfolderBase]: 2086/3156 cut-off events. [2024-06-27 23:55:40,283 INFO L125 PetriNetUnfolderBase]: For 23345/23345 co-relation queries the response was YES. [2024-06-27 23:55:40,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15295 conditions, 3156 events. 2086/3156 cut-off events. For 23345/23345 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14984 event pairs, 1002 based on Foata normal form. 3/3159 useless extension candidates. Maximal degree in co-relation 15253. Up to 3105 conditions per place. [2024-06-27 23:55:40,302 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 118 selfloop transitions, 10 changer transitions 0/131 dead transitions. [2024-06-27 23:55:40,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 131 transitions, 1613 flow [2024-06-27 23:55:40,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:55:40,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:55:40,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-06-27 23:55:40,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 23:55:40,304 INFO L175 Difference]: Start difference. First operand has 89 places, 119 transitions, 1307 flow. Second operand 5 states and 85 transitions. [2024-06-27 23:55:40,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 131 transitions, 1613 flow [2024-06-27 23:55:40,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 131 transitions, 1558 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 23:55:40,327 INFO L231 Difference]: Finished difference. Result has 89 places, 122 transitions, 1310 flow [2024-06-27 23:55:40,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1252, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1310, PETRI_PLACES=89, PETRI_TRANSITIONS=122} [2024-06-27 23:55:40,328 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 48 predicate places. [2024-06-27 23:55:40,328 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 122 transitions, 1310 flow [2024-06-27 23:55:40,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:40,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:40,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:40,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 23:55:40,329 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 23:55:40,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:40,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1977203207, now seen corresponding path program 1 times [2024-06-27 23:55:40,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:40,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446809726] [2024-06-27 23:55:40,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:40,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:40,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:41,861 INFO 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 23:55:41,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:41,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446809726] [2024-06-27 23:55:41,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446809726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:41,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:41,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:55:41,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654434915] [2024-06-27 23:55:41,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:41,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:55:41,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:41,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:55:41,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:55:42,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 23:55:42,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 122 transitions, 1310 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 23:55:42,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:42,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 23:55:42,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:42,630 INFO L124 PetriNetUnfolderBase]: 1995/3051 cut-off events. [2024-06-27 23:55:42,631 INFO L125 PetriNetUnfolderBase]: For 26222/26284 co-relation queries the response was YES. [2024-06-27 23:55:42,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15280 conditions, 3051 events. 1995/3051 cut-off events. For 26222/26284 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15247 event pairs, 557 based on Foata normal form. 31/3045 useless extension candidates. Maximal degree in co-relation 15237. Up to 2418 conditions per place. [2024-06-27 23:55:42,652 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 86 selfloop transitions, 65 changer transitions 0/157 dead transitions. [2024-06-27 23:55:42,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 157 transitions, 1852 flow [2024-06-27 23:55:42,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:55:42,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:55:42,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-27 23:55:42,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-27 23:55:42,654 INFO L175 Difference]: Start difference. First operand has 89 places, 122 transitions, 1310 flow. Second operand 7 states and 147 transitions. [2024-06-27 23:55:42,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 157 transitions, 1852 flow [2024-06-27 23:55:42,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 157 transitions, 1828 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 23:55:42,686 INFO L231 Difference]: Finished difference. Result has 93 places, 128 transitions, 1478 flow [2024-06-27 23:55:42,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1286, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1478, PETRI_PLACES=93, PETRI_TRANSITIONS=128} [2024-06-27 23:55:42,687 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 52 predicate places. [2024-06-27 23:55:42,687 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 128 transitions, 1478 flow [2024-06-27 23:55:42,687 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 23:55:42,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:42,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:42,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 23:55:42,688 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 23:55:42,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:42,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1980291737, now seen corresponding path program 2 times [2024-06-27 23:55:42,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:42,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121119926] [2024-06-27 23:55:42,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:42,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:42,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:44,134 INFO 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 23:55:44,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:44,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121119926] [2024-06-27 23:55:44,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121119926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:44,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:44,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:55:44,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033485956] [2024-06-27 23:55:44,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:44,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:55:44,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:44,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:55:44,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:55:44,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 23:55:44,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 128 transitions, 1478 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 23:55:44,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:44,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 23:55:44,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:44,876 INFO L124 PetriNetUnfolderBase]: 1978/3035 cut-off events. [2024-06-27 23:55:44,877 INFO L125 PetriNetUnfolderBase]: For 30017/30063 co-relation queries the response was YES. [2024-06-27 23:55:44,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15962 conditions, 3035 events. 1978/3035 cut-off events. For 30017/30063 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15150 event pairs, 545 based on Foata normal form. 24/3026 useless extension candidates. Maximal degree in co-relation 15917. Up to 2521 conditions per place. [2024-06-27 23:55:44,895 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 82 selfloop transitions, 68 changer transitions 0/156 dead transitions. [2024-06-27 23:55:44,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 156 transitions, 1980 flow [2024-06-27 23:55:44,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:55:44,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:55:44,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-27 23:55:44,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-06-27 23:55:44,897 INFO L175 Difference]: Start difference. First operand has 93 places, 128 transitions, 1478 flow. Second operand 7 states and 144 transitions. [2024-06-27 23:55:44,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 156 transitions, 1980 flow [2024-06-27 23:55:44,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 156 transitions, 1889 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 23:55:44,930 INFO L231 Difference]: Finished difference. Result has 97 places, 128 transitions, 1536 flow [2024-06-27 23:55:44,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1387, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1536, PETRI_PLACES=97, PETRI_TRANSITIONS=128} [2024-06-27 23:55:44,930 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 56 predicate places. [2024-06-27 23:55:44,930 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 128 transitions, 1536 flow [2024-06-27 23:55:44,930 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 23:55:44,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:44,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:44,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 23:55:44,931 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 23:55:44,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:44,931 INFO L85 PathProgramCache]: Analyzing trace with hash -2130294529, now seen corresponding path program 1 times [2024-06-27 23:55:44,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:44,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244857] [2024-06-27 23:55:44,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:44,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:44,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:46,456 INFO 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 23:55:46,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:46,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244857] [2024-06-27 23:55:46,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:46,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:46,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:55:46,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42131584] [2024-06-27 23:55:46,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:46,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:55:46,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:46,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:55:46,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:55:46,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:55:46,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 128 transitions, 1536 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:46,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:46,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:55:46,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:47,282 INFO L124 PetriNetUnfolderBase]: 2145/3232 cut-off events. [2024-06-27 23:55:47,282 INFO L125 PetriNetUnfolderBase]: For 33335/33364 co-relation queries the response was YES. [2024-06-27 23:55:47,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17644 conditions, 3232 events. 2145/3232 cut-off events. For 33335/33364 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 15412 event pairs, 579 based on Foata normal form. 24/3256 useless extension candidates. Maximal degree in co-relation 17597. Up to 2744 conditions per place. [2024-06-27 23:55:47,316 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 104 selfloop transitions, 79 changer transitions 0/186 dead transitions. [2024-06-27 23:55:47,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 186 transitions, 2525 flow [2024-06-27 23:55:47,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:55:47,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:55:47,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 23:55:47,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.471875 [2024-06-27 23:55:47,318 INFO L175 Difference]: Start difference. First operand has 97 places, 128 transitions, 1536 flow. Second operand 8 states and 151 transitions. [2024-06-27 23:55:47,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 186 transitions, 2525 flow [2024-06-27 23:55:47,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 186 transitions, 2327 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 23:55:47,353 INFO L231 Difference]: Finished difference. Result has 101 places, 150 transitions, 1916 flow [2024-06-27 23:55:47,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1385, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1916, PETRI_PLACES=101, PETRI_TRANSITIONS=150} [2024-06-27 23:55:47,354 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 60 predicate places. [2024-06-27 23:55:47,354 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 150 transitions, 1916 flow [2024-06-27 23:55:47,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:47,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:47,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:47,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 23:55:47,355 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:55:47,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:47,355 INFO L85 PathProgramCache]: Analyzing trace with hash 127190231, now seen corresponding path program 2 times [2024-06-27 23:55:47,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:47,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120223002] [2024-06-27 23:55:47,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:47,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:48,702 INFO 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 23:55:48,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:48,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120223002] [2024-06-27 23:55:48,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120223002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:48,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:48,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:55:48,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275110568] [2024-06-27 23:55:48,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:48,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:55:48,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:48,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:55:48,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:55:48,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:55:48,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 150 transitions, 1916 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:48,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:48,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:55:48,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:49,486 INFO L124 PetriNetUnfolderBase]: 2154/3248 cut-off events. [2024-06-27 23:55:49,486 INFO L125 PetriNetUnfolderBase]: For 37569/37569 co-relation queries the response was YES. [2024-06-27 23:55:49,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18201 conditions, 3248 events. 2154/3248 cut-off events. For 37569/37569 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 15451 event pairs, 962 based on Foata normal form. 2/3250 useless extension candidates. Maximal degree in co-relation 18152. Up to 3150 conditions per place. [2024-06-27 23:55:49,508 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 146 selfloop transitions, 27 changer transitions 0/176 dead transitions. [2024-06-27 23:55:49,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 176 transitions, 2443 flow [2024-06-27 23:55:49,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:55:49,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:55:49,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 23:55:49,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43214285714285716 [2024-06-27 23:55:49,511 INFO L175 Difference]: Start difference. First operand has 101 places, 150 transitions, 1916 flow. Second operand 7 states and 121 transitions. [2024-06-27 23:55:49,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 176 transitions, 2443 flow [2024-06-27 23:55:49,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 176 transitions, 2328 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 23:55:49,549 INFO L231 Difference]: Finished difference. Result has 104 places, 156 transitions, 1979 flow [2024-06-27 23:55:49,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1804, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1979, PETRI_PLACES=104, PETRI_TRANSITIONS=156} [2024-06-27 23:55:49,549 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 63 predicate places. [2024-06-27 23:55:49,550 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 156 transitions, 1979 flow [2024-06-27 23:55:49,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:49,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:49,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:49,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 23:55:49,550 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 23:55:49,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:49,551 INFO L85 PathProgramCache]: Analyzing trace with hash -730761917, now seen corresponding path program 3 times [2024-06-27 23:55:49,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:49,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143702084] [2024-06-27 23:55:49,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:49,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:49,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:50,946 INFO 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 23:55:50,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:50,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143702084] [2024-06-27 23:55:50,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143702084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:50,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:50,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:55:50,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666670757] [2024-06-27 23:55:50,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:50,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:55:50,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:50,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:55:50,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:55:51,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:55:51,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 156 transitions, 1979 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:51,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:51,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:55:51,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:51,672 INFO L124 PetriNetUnfolderBase]: 2148/3239 cut-off events. [2024-06-27 23:55:51,672 INFO L125 PetriNetUnfolderBase]: For 39840/39840 co-relation queries the response was YES. [2024-06-27 23:55:51,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18143 conditions, 3239 events. 2148/3239 cut-off events. For 39840/39840 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 15400 event pairs, 962 based on Foata normal form. 3/3242 useless extension candidates. Maximal degree in co-relation 18093. Up to 3140 conditions per place. [2024-06-27 23:55:51,691 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 149 selfloop transitions, 27 changer transitions 0/179 dead transitions. [2024-06-27 23:55:51,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 179 transitions, 2467 flow [2024-06-27 23:55:51,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:55:51,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:55:51,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 23:55:51,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 23:55:51,696 INFO L175 Difference]: Start difference. First operand has 104 places, 156 transitions, 1979 flow. Second operand 7 states and 120 transitions. [2024-06-27 23:55:51,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 179 transitions, 2467 flow [2024-06-27 23:55:51,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 179 transitions, 2278 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 23:55:51,735 INFO L231 Difference]: Finished difference. Result has 104 places, 159 transitions, 1917 flow [2024-06-27 23:55:51,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1795, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1917, PETRI_PLACES=104, PETRI_TRANSITIONS=159} [2024-06-27 23:55:51,736 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 63 predicate places. [2024-06-27 23:55:51,737 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 159 transitions, 1917 flow [2024-06-27 23:55:51,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:51,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:51,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:51,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 23:55:51,738 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 23:55:51,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:51,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1170847239, now seen corresponding path program 1 times [2024-06-27 23:55:51,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:51,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537611685] [2024-06-27 23:55:51,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:51,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:51,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:53,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:55:53,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:53,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537611685] [2024-06-27 23:55:53,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537611685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:53,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:53,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:55:53,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725192509] [2024-06-27 23:55:53,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:53,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:55:53,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:53,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:55:53,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:55:53,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 23:55:53,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 159 transitions, 1917 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 23:55:53,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:53,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 23:55:53,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:54,325 INFO L124 PetriNetUnfolderBase]: 2170/3334 cut-off events. [2024-06-27 23:55:54,325 INFO L125 PetriNetUnfolderBase]: For 47647/47710 co-relation queries the response was YES. [2024-06-27 23:55:54,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18833 conditions, 3334 events. 2170/3334 cut-off events. For 47647/47710 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 16989 event pairs, 399 based on Foata normal form. 47/3345 useless extension candidates. Maximal degree in co-relation 18782. Up to 2132 conditions per place. [2024-06-27 23:55:54,353 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 105 selfloop transitions, 90 changer transitions 0/202 dead transitions. [2024-06-27 23:55:54,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 202 transitions, 2631 flow [2024-06-27 23:55:54,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:55:54,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:55:54,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-27 23:55:54,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.528125 [2024-06-27 23:55:54,356 INFO L175 Difference]: Start difference. First operand has 104 places, 159 transitions, 1917 flow. Second operand 8 states and 169 transitions. [2024-06-27 23:55:54,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 202 transitions, 2631 flow [2024-06-27 23:55:54,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 202 transitions, 2598 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 23:55:54,413 INFO L231 Difference]: Finished difference. Result has 108 places, 161 transitions, 2104 flow [2024-06-27 23:55:54,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1884, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2104, PETRI_PLACES=108, PETRI_TRANSITIONS=161} [2024-06-27 23:55:54,415 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2024-06-27 23:55:54,415 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 161 transitions, 2104 flow [2024-06-27 23:55:54,415 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 23:55:54,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:54,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:54,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 23:55:54,415 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 23:55:54,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:54,416 INFO L85 PathProgramCache]: Analyzing trace with hash -976629053, now seen corresponding path program 2 times [2024-06-27 23:55:54,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:54,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45213427] [2024-06-27 23:55:54,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:54,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:54,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:56,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:55:56,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:56,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45213427] [2024-06-27 23:55:56,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45213427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:56,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:56,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:55:56,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504642197] [2024-06-27 23:55:56,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:56,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:55:56,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:56,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:55:56,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:55:56,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 23:55:56,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 161 transitions, 2104 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 23:55:56,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:56,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 23:55:56,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:56,971 INFO L124 PetriNetUnfolderBase]: 2246/3466 cut-off events. [2024-06-27 23:55:56,972 INFO L125 PetriNetUnfolderBase]: For 54948/55011 co-relation queries the response was YES. [2024-06-27 23:55:56,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20059 conditions, 3466 events. 2246/3466 cut-off events. For 54948/55011 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 17979 event pairs, 581 based on Foata normal form. 49/3483 useless extension candidates. Maximal degree in co-relation 20006. Up to 2646 conditions per place. [2024-06-27 23:55:56,997 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 103 selfloop transitions, 88 changer transitions 0/198 dead transitions. [2024-06-27 23:55:56,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 198 transitions, 2718 flow [2024-06-27 23:55:56,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:55:57,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:55:57,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-27 23:55:57,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515625 [2024-06-27 23:55:57,025 INFO L175 Difference]: Start difference. First operand has 108 places, 161 transitions, 2104 flow. Second operand 8 states and 165 transitions. [2024-06-27 23:55:57,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 198 transitions, 2718 flow [2024-06-27 23:55:57,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 198 transitions, 2600 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 23:55:57,082 INFO L231 Difference]: Finished difference. Result has 112 places, 162 transitions, 2189 flow [2024-06-27 23:55:57,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1986, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2189, PETRI_PLACES=112, PETRI_TRANSITIONS=162} [2024-06-27 23:55:57,083 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 71 predicate places. [2024-06-27 23:55:57,083 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 162 transitions, 2189 flow [2024-06-27 23:55:57,083 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 23:55:57,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:57,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:57,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 23:55:57,084 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 23:55:57,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:57,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1259502279, now seen corresponding path program 3 times [2024-06-27 23:55:57,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:57,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431021224] [2024-06-27 23:55:57,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:57,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:57,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:58,677 INFO 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 23:55:58,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:58,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431021224] [2024-06-27 23:55:58,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431021224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:58,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:58,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:55:58,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923193816] [2024-06-27 23:55:58,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:58,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:55:58,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:58,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:55:58,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:55:58,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 23:55:58,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 162 transitions, 2189 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 23:55:58,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:58,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 23:55:58,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:59,574 INFO L124 PetriNetUnfolderBase]: 2204/3404 cut-off events. [2024-06-27 23:55:59,574 INFO L125 PetriNetUnfolderBase]: For 55607/55656 co-relation queries the response was YES. [2024-06-27 23:55:59,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19919 conditions, 3404 events. 2204/3404 cut-off events. For 55607/55656 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 17469 event pairs, 568 based on Foata normal form. 48/3427 useless extension candidates. Maximal degree in co-relation 19864. Up to 2689 conditions per place. [2024-06-27 23:55:59,599 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 97 selfloop transitions, 94 changer transitions 0/198 dead transitions. [2024-06-27 23:55:59,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 198 transitions, 2805 flow [2024-06-27 23:55:59,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:55:59,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:55:59,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-27 23:55:59,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50625 [2024-06-27 23:55:59,601 INFO L175 Difference]: Start difference. First operand has 112 places, 162 transitions, 2189 flow. Second operand 8 states and 162 transitions. [2024-06-27 23:55:59,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 198 transitions, 2805 flow [2024-06-27 23:55:59,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 198 transitions, 2618 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 23:55:59,664 INFO L231 Difference]: Finished difference. Result has 114 places, 162 transitions, 2197 flow [2024-06-27 23:55:59,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2002, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2197, PETRI_PLACES=114, PETRI_TRANSITIONS=162} [2024-06-27 23:55:59,665 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 73 predicate places. [2024-06-27 23:55:59,665 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 162 transitions, 2197 flow [2024-06-27 23:55:59,665 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 23:55:59,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:59,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:59,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 23:55:59,666 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:55:59,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:59,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1614620197, now seen corresponding path program 1 times [2024-06-27 23:55:59,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:59,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563109363] [2024-06-27 23:55:59,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:59,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:59,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:56:01,167 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 23:56:01,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:56:01,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563109363] [2024-06-27 23:56:01,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563109363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:56:01,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:56:01,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:56:01,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199467575] [2024-06-27 23:56:01,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:56:01,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:56:01,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:56:01,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:56:01,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:56:01,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:56:01,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 162 transitions, 2197 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:56:01,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:56:01,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:56:01,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:56:02,194 INFO L124 PetriNetUnfolderBase]: 2366/3600 cut-off events. [2024-06-27 23:56:02,195 INFO L125 PetriNetUnfolderBase]: For 55616/55634 co-relation queries the response was YES. [2024-06-27 23:56:02,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20878 conditions, 3600 events. 2366/3600 cut-off events. For 55616/55634 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 17848 event pairs, 593 based on Foata normal form. 22/3622 useless extension candidates. Maximal degree in co-relation 20822. Up to 3057 conditions per place. [2024-06-27 23:56:02,219 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 115 selfloop transitions, 86 changer transitions 0/204 dead transitions. [2024-06-27 23:56:02,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 204 transitions, 2851 flow [2024-06-27 23:56:02,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:56:02,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:56:02,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 23:56:02,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2024-06-27 23:56:02,221 INFO L175 Difference]: Start difference. First operand has 114 places, 162 transitions, 2197 flow. Second operand 8 states and 156 transitions. [2024-06-27 23:56:02,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 204 transitions, 2851 flow [2024-06-27 23:56:02,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 204 transitions, 2650 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 23:56:02,277 INFO L231 Difference]: Finished difference. Result has 115 places, 165 transitions, 2215 flow [2024-06-27 23:56:02,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1998, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2215, PETRI_PLACES=115, PETRI_TRANSITIONS=165} [2024-06-27 23:56:02,278 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 74 predicate places. [2024-06-27 23:56:02,278 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 165 transitions, 2215 flow [2024-06-27 23:56:02,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:56:02,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:56:02,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:56:02,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 23:56:02,279 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:56:02,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:56:02,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1828578534, now seen corresponding path program 1 times [2024-06-27 23:56:02,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:56:02,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085897609] [2024-06-27 23:56:02,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:56:02,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:56:02,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:56:03,545 INFO 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 23:56:03,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:56:03,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085897609] [2024-06-27 23:56:03,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085897609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:56:03,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:56:03,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:56:03,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526023275] [2024-06-27 23:56:03,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:56:03,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:56:03,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:56:03,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:56:03,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:56:03,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:56:03,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 165 transitions, 2215 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 23:56:03,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:56:03,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:56:03,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:56:04,391 INFO L124 PetriNetUnfolderBase]: 2371/3619 cut-off events. [2024-06-27 23:56:04,392 INFO L125 PetriNetUnfolderBase]: For 58490/58490 co-relation queries the response was YES. [2024-06-27 23:56:04,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21234 conditions, 3619 events. 2371/3619 cut-off events. For 58490/58490 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 18123 event pairs, 967 based on Foata normal form. 1/3620 useless extension candidates. Maximal degree in co-relation 21178. Up to 3540 conditions per place. [2024-06-27 23:56:04,415 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 169 selfloop transitions, 23 changer transitions 0/195 dead transitions. [2024-06-27 23:56:04,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 195 transitions, 2799 flow [2024-06-27 23:56:04,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:56:04,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:56:04,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 23:56:04,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 23:56:04,417 INFO L175 Difference]: Start difference. First operand has 115 places, 165 transitions, 2215 flow. Second operand 7 states and 119 transitions. [2024-06-27 23:56:04,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 195 transitions, 2799 flow [2024-06-27 23:56:04,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 195 transitions, 2604 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 23:56:04,483 INFO L231 Difference]: Finished difference. Result has 118 places, 177 transitions, 2202 flow [2024-06-27 23:56:04,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2024, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2202, PETRI_PLACES=118, PETRI_TRANSITIONS=177} [2024-06-27 23:56:04,484 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 77 predicate places. [2024-06-27 23:56:04,484 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 177 transitions, 2202 flow [2024-06-27 23:56:04,484 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 23:56:04,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:56:04,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:56:04,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 23:56:04,485 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:56:04,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:56:04,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1311527397, now seen corresponding path program 2 times [2024-06-27 23:56:04,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:56:04,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341756419] [2024-06-27 23:56:04,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:56:04,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:56:04,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:56:06,097 INFO 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 23:56:06,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:56:06,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341756419] [2024-06-27 23:56:06,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341756419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:56:06,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:56:06,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:56:06,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050665865] [2024-06-27 23:56:06,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:56:06,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:56:06,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:56:06,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:56:06,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:56:06,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:56:06,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 177 transitions, 2202 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:56:06,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:56:06,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:56:06,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:56:07,030 INFO L124 PetriNetUnfolderBase]: 2427/3706 cut-off events. [2024-06-27 23:56:07,030 INFO L125 PetriNetUnfolderBase]: For 64257/64259 co-relation queries the response was YES. [2024-06-27 23:56:07,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21714 conditions, 3706 events. 2427/3706 cut-off events. For 64257/64259 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 18638 event pairs, 1062 based on Foata normal form. 10/3716 useless extension candidates. Maximal degree in co-relation 21654. Up to 3247 conditions per place. [2024-06-27 23:56:07,058 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 141 selfloop transitions, 78 changer transitions 0/222 dead transitions. [2024-06-27 23:56:07,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 222 transitions, 2952 flow [2024-06-27 23:56:07,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:56:07,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:56:07,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 23:56:07,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446875 [2024-06-27 23:56:07,060 INFO L175 Difference]: Start difference. First operand has 118 places, 177 transitions, 2202 flow. Second operand 8 states and 143 transitions. [2024-06-27 23:56:07,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 222 transitions, 2952 flow [2024-06-27 23:56:07,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 222 transitions, 2930 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-27 23:56:07,126 INFO L231 Difference]: Finished difference. Result has 126 places, 190 transitions, 2523 flow [2024-06-27 23:56:07,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2180, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2523, PETRI_PLACES=126, PETRI_TRANSITIONS=190} [2024-06-27 23:56:07,127 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 85 predicate places. [2024-06-27 23:56:07,127 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 190 transitions, 2523 flow [2024-06-27 23:56:07,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:56:07,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:56:07,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:56:07,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 23:56:07,128 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:56:07,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:56:07,128 INFO L85 PathProgramCache]: Analyzing trace with hash -637167914, now seen corresponding path program 2 times [2024-06-27 23:56:07,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:56:07,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108281942] [2024-06-27 23:56:07,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:56:07,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:56:07,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:56:08,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:56:08,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:56:08,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108281942] [2024-06-27 23:56:08,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108281942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:56:08,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:56:08,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:56:08,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794109249] [2024-06-27 23:56:08,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:56:08,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:56:08,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:56:08,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:56:08,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:56:08,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:56:08,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 190 transitions, 2523 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 23:56:08,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:56:08,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:56:08,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:56:08,988 INFO L124 PetriNetUnfolderBase]: 2453/3744 cut-off events. [2024-06-27 23:56:08,989 INFO L125 PetriNetUnfolderBase]: For 70666/70666 co-relation queries the response was YES. [2024-06-27 23:56:09,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23020 conditions, 3744 events. 2453/3744 cut-off events. For 70666/70666 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 18887 event pairs, 1080 based on Foata normal form. 1/3745 useless extension candidates. Maximal degree in co-relation 22956. Up to 3662 conditions per place. [2024-06-27 23:56:09,016 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 185 selfloop transitions, 29 changer transitions 0/217 dead transitions. [2024-06-27 23:56:09,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 217 transitions, 3164 flow [2024-06-27 23:56:09,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:56:09,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:56:09,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-27 23:56:09,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 23:56:09,018 INFO L175 Difference]: Start difference. First operand has 126 places, 190 transitions, 2523 flow. Second operand 6 states and 105 transitions. [2024-06-27 23:56:09,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 217 transitions, 3164 flow [2024-06-27 23:56:09,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 217 transitions, 3028 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-27 23:56:09,091 INFO L231 Difference]: Finished difference. Result has 130 places, 204 transitions, 2629 flow [2024-06-27 23:56:09,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2387, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2629, PETRI_PLACES=130, PETRI_TRANSITIONS=204} [2024-06-27 23:56:09,091 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 89 predicate places. [2024-06-27 23:56:09,092 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 204 transitions, 2629 flow [2024-06-27 23:56:09,092 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 23:56:09,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:56:09,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:56:09,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 23:56:09,092 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 23:56:09,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:56:09,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1178782185, now seen corresponding path program 3 times [2024-06-27 23:56:09,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:56:09,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90909977] [2024-06-27 23:56:09,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:56:09,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:56:09,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:56:10,611 INFO 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 23:56:10,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:56:10,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90909977] [2024-06-27 23:56:10,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90909977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:56:10,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:56:10,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:56:10,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541892700] [2024-06-27 23:56:10,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:56:10,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:56:10,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:56:10,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:56:10,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:56:10,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:56:10,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 204 transitions, 2629 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:56:10,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:56:10,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:56:10,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:56:11,548 INFO L124 PetriNetUnfolderBase]: 2470/3770 cut-off events. [2024-06-27 23:56:11,549 INFO L125 PetriNetUnfolderBase]: For 76157/76157 co-relation queries the response was YES. [2024-06-27 23:56:11,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23531 conditions, 3770 events. 2470/3770 cut-off events. For 76157/76157 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 19019 event pairs, 1078 based on Foata normal form. 4/3774 useless extension candidates. Maximal degree in co-relation 23463. Up to 3640 conditions per place. [2024-06-27 23:56:11,575 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 199 selfloop transitions, 29 changer transitions 0/231 dead transitions. [2024-06-27 23:56:11,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 231 transitions, 3230 flow [2024-06-27 23:56:11,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:56:11,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:56:11,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-27 23:56:11,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3972222222222222 [2024-06-27 23:56:11,577 INFO L175 Difference]: Start difference. First operand has 130 places, 204 transitions, 2629 flow. Second operand 9 states and 143 transitions. [2024-06-27 23:56:11,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 231 transitions, 3230 flow [2024-06-27 23:56:11,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 231 transitions, 3187 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-27 23:56:11,670 INFO L231 Difference]: Finished difference. Result has 137 places, 206 transitions, 2693 flow [2024-06-27 23:56:11,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2586, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2693, PETRI_PLACES=137, PETRI_TRANSITIONS=206} [2024-06-27 23:56:11,670 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 96 predicate places. [2024-06-27 23:56:11,671 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 206 transitions, 2693 flow [2024-06-27 23:56:11,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:56:11,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:56:11,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:56:11,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 23:56:11,671 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 23:56:11,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:56:11,672 INFO L85 PathProgramCache]: Analyzing trace with hash -27301693, now seen corresponding path program 4 times [2024-06-27 23:56:11,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:56:11,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608560708] [2024-06-27 23:56:11,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:56:11,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:56:11,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:56:13,034 INFO 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 23:56:13,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:56:13,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608560708] [2024-06-27 23:56:13,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608560708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:56:13,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:56:13,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:56:13,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847891862] [2024-06-27 23:56:13,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:56:13,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:56:13,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:56:13,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:56:13,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:56:13,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:56:13,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 206 transitions, 2693 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:56:13,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:56:13,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:56:13,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:56:14,045 INFO L124 PetriNetUnfolderBase]: 2487/3797 cut-off events. [2024-06-27 23:56:14,045 INFO L125 PetriNetUnfolderBase]: For 82861/82861 co-relation queries the response was YES. [2024-06-27 23:56:14,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24083 conditions, 3797 events. 2487/3797 cut-off events. For 82861/82861 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 19166 event pairs, 1064 based on Foata normal form. 4/3801 useless extension candidates. Maximal degree in co-relation 24013. Up to 3681 conditions per place. [2024-06-27 23:56:14,072 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 209 selfloop transitions, 20 changer transitions 0/232 dead transitions. [2024-06-27 23:56:14,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 232 transitions, 3283 flow [2024-06-27 23:56:14,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:56:14,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:56:14,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-27 23:56:14,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39444444444444443 [2024-06-27 23:56:14,074 INFO L175 Difference]: Start difference. First operand has 137 places, 206 transitions, 2693 flow. Second operand 9 states and 142 transitions. [2024-06-27 23:56:14,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 232 transitions, 3283 flow [2024-06-27 23:56:14,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 232 transitions, 3190 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-27 23:56:14,181 INFO L231 Difference]: Finished difference. Result has 138 places, 208 transitions, 2691 flow [2024-06-27 23:56:14,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2600, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2691, PETRI_PLACES=138, PETRI_TRANSITIONS=208} [2024-06-27 23:56:14,182 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 97 predicate places. [2024-06-27 23:56:14,182 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 208 transitions, 2691 flow [2024-06-27 23:56:14,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:56:14,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:56:14,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:56:14,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 23:56:14,182 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 23:56:14,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:56:14,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1406683335, now seen corresponding path program 5 times [2024-06-27 23:56:14,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:56:14,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995333370] [2024-06-27 23:56:14,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:56:14,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:56:14,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:56:15,780 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 23:56:15,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:56:15,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995333370] [2024-06-27 23:56:15,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995333370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:56:15,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:56:15,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:56:15,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030098657] [2024-06-27 23:56:15,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:56:15,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:56:15,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:56:15,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:56:15,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:56:15,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:56:15,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 208 transitions, 2691 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:56:15,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:56:15,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:56:15,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:56:16,798 INFO L124 PetriNetUnfolderBase]: 2515/3840 cut-off events. [2024-06-27 23:56:16,799 INFO L125 PetriNetUnfolderBase]: For 88800/88800 co-relation queries the response was YES. [2024-06-27 23:56:16,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24545 conditions, 3840 events. 2515/3840 cut-off events. For 88800/88800 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 19517 event pairs, 1075 based on Foata normal form. 4/3844 useless extension candidates. Maximal degree in co-relation 24475. Up to 3665 conditions per place. [2024-06-27 23:56:16,824 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 197 selfloop transitions, 40 changer transitions 0/240 dead transitions. [2024-06-27 23:56:16,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 240 transitions, 3355 flow [2024-06-27 23:56:16,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:56:16,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:56:16,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 23:56:16,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 23:56:16,825 INFO L175 Difference]: Start difference. First operand has 138 places, 208 transitions, 2691 flow. Second operand 8 states and 136 transitions. [2024-06-27 23:56:16,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 240 transitions, 3355 flow [2024-06-27 23:56:16,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 240 transitions, 3282 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-27 23:56:16,928 INFO L231 Difference]: Finished difference. Result has 139 places, 212 transitions, 2769 flow [2024-06-27 23:56:16,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2618, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2769, PETRI_PLACES=139, PETRI_TRANSITIONS=212} [2024-06-27 23:56:16,928 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 98 predicate places. [2024-06-27 23:56:16,929 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 212 transitions, 2769 flow [2024-06-27 23:56:16,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:56:16,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:56:16,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:56:16,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 23:56:16,929 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:56:16,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:56:16,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1170508223, now seen corresponding path program 1 times [2024-06-27 23:56:16,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:56:16,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705574213] [2024-06-27 23:56:16,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:56:16,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:56:16,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:56:18,118 INFO 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 23:56:18,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:56:18,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705574213] [2024-06-27 23:56:18,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705574213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:56:18,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:56:18,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:56:18,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880146406] [2024-06-27 23:56:18,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:56:18,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:56:18,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:56:18,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:56:18,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:56:18,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:56:18,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 212 transitions, 2769 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:56:18,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:56:18,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:56:18,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:56:18,910 INFO L124 PetriNetUnfolderBase]: 2495/3812 cut-off events. [2024-06-27 23:56:18,910 INFO L125 PetriNetUnfolderBase]: For 94254/94256 co-relation queries the response was YES. [2024-06-27 23:56:18,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24686 conditions, 3812 events. 2495/3812 cut-off events. For 94254/94256 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 19320 event pairs, 1063 based on Foata normal form. 4/3816 useless extension candidates. Maximal degree in co-relation 24615. Up to 3491 conditions per place. [2024-06-27 23:56:18,940 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 173 selfloop transitions, 65 changer transitions 0/241 dead transitions. [2024-06-27 23:56:18,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 241 transitions, 3417 flow [2024-06-27 23:56:18,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:56:18,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:56:18,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-27 23:56:18,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-27 23:56:18,942 INFO L175 Difference]: Start difference. First operand has 139 places, 212 transitions, 2769 flow. Second operand 7 states and 128 transitions. [2024-06-27 23:56:18,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 241 transitions, 3417 flow [2024-06-27 23:56:19,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 241 transitions, 3306 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 23:56:19,066 INFO L231 Difference]: Finished difference. Result has 142 places, 218 transitions, 2931 flow [2024-06-27 23:56:19,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2660, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2931, PETRI_PLACES=142, PETRI_TRANSITIONS=218} [2024-06-27 23:56:19,067 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 101 predicate places. [2024-06-27 23:56:19,067 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 218 transitions, 2931 flow [2024-06-27 23:56:19,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:56:19,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:56:19,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:56:19,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 23:56:19,068 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:56:19,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:56:19,068 INFO L85 PathProgramCache]: Analyzing trace with hash 447667517, now seen corresponding path program 6 times [2024-06-27 23:56:19,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:56:19,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733262306] [2024-06-27 23:56:19,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:56:19,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:56:19,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:56:20,409 INFO 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 23:56:20,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:56:20,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733262306] [2024-06-27 23:56:20,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733262306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:56:20,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:56:20,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:56:20,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503811488] [2024-06-27 23:56:20,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:56:20,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:56:20,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:56:20,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:56:20,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:56:20,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:56:20,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 218 transitions, 2931 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:56:20,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:56:20,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:56:20,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:56:21,419 INFO L124 PetriNetUnfolderBase]: 2487/3790 cut-off events. [2024-06-27 23:56:21,425 INFO L125 PetriNetUnfolderBase]: For 98701/98701 co-relation queries the response was YES. [2024-06-27 23:56:21,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24978 conditions, 3790 events. 2487/3790 cut-off events. For 98701/98701 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 19123 event pairs, 1076 based on Foata normal form. 4/3794 useless extension candidates. Maximal degree in co-relation 24905. Up to 3666 conditions per place. [2024-06-27 23:56:21,474 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 213 selfloop transitions, 29 changer transitions 0/245 dead transitions. [2024-06-27 23:56:21,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 245 transitions, 3571 flow [2024-06-27 23:56:21,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:56:21,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:56:21,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 23:56:21,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 23:56:21,477 INFO L175 Difference]: Start difference. First operand has 142 places, 218 transitions, 2931 flow. Second operand 8 states and 136 transitions. [2024-06-27 23:56:21,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 245 transitions, 3571 flow [2024-06-27 23:56:21,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 245 transitions, 3500 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 23:56:21,752 INFO L231 Difference]: Finished difference. Result has 146 places, 220 transitions, 2977 flow [2024-06-27 23:56:21,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2860, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2977, PETRI_PLACES=146, PETRI_TRANSITIONS=220} [2024-06-27 23:56:21,753 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 105 predicate places. [2024-06-27 23:56:21,753 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 220 transitions, 2977 flow [2024-06-27 23:56:21,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:56:21,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:56:21,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:56:21,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 23:56:21,754 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 23:56:21,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:56:21,754 INFO L85 PathProgramCache]: Analyzing trace with hash -625740074, now seen corresponding path program 3 times [2024-06-27 23:56:21,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:56:21,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674285493] [2024-06-27 23:56:21,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:56:21,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:56:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:56:22,817 INFO 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 23:56:22,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:56:22,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674285493] [2024-06-27 23:56:22,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674285493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:56:22,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:56:22,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:56:22,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014485687] [2024-06-27 23:56:22,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:56:22,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:56:22,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:56:22,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:56:22,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:56:22,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:56:22,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 220 transitions, 2977 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 23:56:22,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:56:22,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:56:22,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:56:23,539 INFO L124 PetriNetUnfolderBase]: 2484/3785 cut-off events. [2024-06-27 23:56:23,540 INFO L125 PetriNetUnfolderBase]: For 103662/103662 co-relation queries the response was YES. [2024-06-27 23:56:23,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25213 conditions, 3785 events. 2484/3785 cut-off events. For 103662/103662 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 19074 event pairs, 1084 based on Foata normal form. 1/3786 useless extension candidates. Maximal degree in co-relation 25138. Up to 3736 conditions per place. [2024-06-27 23:56:23,571 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 212 selfloop transitions, 13 changer transitions 0/228 dead transitions. [2024-06-27 23:56:23,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 228 transitions, 3453 flow [2024-06-27 23:56:23,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:56:23,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:56:23,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-27 23:56:23,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-27 23:56:23,573 INFO L175 Difference]: Start difference. First operand has 146 places, 220 transitions, 2977 flow. Second operand 6 states and 95 transitions. [2024-06-27 23:56:23,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 228 transitions, 3453 flow [2024-06-27 23:56:23,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 228 transitions, 3342 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 23:56:23,746 INFO L231 Difference]: Finished difference. Result has 146 places, 220 transitions, 2898 flow [2024-06-27 23:56:23,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2866, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2898, PETRI_PLACES=146, PETRI_TRANSITIONS=220} [2024-06-27 23:56:23,747 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 105 predicate places. [2024-06-27 23:56:23,747 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 220 transitions, 2898 flow [2024-06-27 23:56:23,747 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 23:56:23,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:56:23,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:56:23,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 23:56:23,748 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 23:56:23,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:56:23,748 INFO L85 PathProgramCache]: Analyzing trace with hash -631448042, now seen corresponding path program 1 times [2024-06-27 23:56:23,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:56:23,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487000415] [2024-06-27 23:56:23,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:56:23,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:56:23,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:56:25,136 INFO 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 23:56:25,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:56:25,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487000415] [2024-06-27 23:56:25,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487000415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:56:25,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:56:25,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:56:25,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737444476] [2024-06-27 23:56:25,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:56:25,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:56:25,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:56:25,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:56:25,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:56:25,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:56:25,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 220 transitions, 2898 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 23:56:25,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:56:25,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:56:25,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:56:26,023 INFO L124 PetriNetUnfolderBase]: 2499/3806 cut-off events. [2024-06-27 23:56:26,023 INFO L125 PetriNetUnfolderBase]: For 108838/108838 co-relation queries the response was YES. [2024-06-27 23:56:26,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25277 conditions, 3806 events. 2499/3806 cut-off events. For 108838/108838 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 19210 event pairs, 1083 based on Foata normal form. 3/3809 useless extension candidates. Maximal degree in co-relation 25201. Up to 3714 conditions per place. [2024-06-27 23:56:26,057 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 216 selfloop transitions, 24 changer transitions 0/243 dead transitions. [2024-06-27 23:56:26,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 243 transitions, 3581 flow [2024-06-27 23:56:26,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:56:26,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:56:26,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-27 23:56:26,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44583333333333336 [2024-06-27 23:56:26,058 INFO L175 Difference]: Start difference. First operand has 146 places, 220 transitions, 2898 flow. Second operand 6 states and 107 transitions. [2024-06-27 23:56:26,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 243 transitions, 3581 flow [2024-06-27 23:56:26,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 243 transitions, 3542 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 23:56:26,235 INFO L231 Difference]: Finished difference. Result has 149 places, 228 transitions, 3031 flow [2024-06-27 23:56:26,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2859, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3031, PETRI_PLACES=149, PETRI_TRANSITIONS=228} [2024-06-27 23:56:26,236 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 108 predicate places. [2024-06-27 23:56:26,236 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 228 transitions, 3031 flow [2024-06-27 23:56:26,236 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 23:56:26,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:56:26,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:56:26,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 23:56:26,237 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 23:56:26,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:56:26,237 INFO L85 PathProgramCache]: Analyzing trace with hash 347537848, now seen corresponding path program 2 times [2024-06-27 23:56:26,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:56:26,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107239327] [2024-06-27 23:56:26,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:56:26,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:56:26,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:56:27,582 INFO 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 23:56:27,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:56:27,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107239327] [2024-06-27 23:56:27,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107239327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:56:27,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:56:27,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:56:27,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079894483] [2024-06-27 23:56:27,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:56:27,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:56:27,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:56:27,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:56:27,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:56:27,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:56:27,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 228 transitions, 3031 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 23:56:27,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:56:27,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:56:27,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:56:28,474 INFO L124 PetriNetUnfolderBase]: 2490/3794 cut-off events. [2024-06-27 23:56:28,474 INFO L125 PetriNetUnfolderBase]: For 114144/114148 co-relation queries the response was YES. [2024-06-27 23:56:28,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25733 conditions, 3794 events. 2490/3794 cut-off events. For 114144/114148 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 19120 event pairs, 1074 based on Foata normal form. 7/3801 useless extension candidates. Maximal degree in co-relation 25655. Up to 3707 conditions per place. [2024-06-27 23:56:28,507 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 213 selfloop transitions, 25 changer transitions 0/241 dead transitions. [2024-06-27 23:56:28,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 241 transitions, 3562 flow [2024-06-27 23:56:28,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:56:28,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:56:28,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-27 23:56:28,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42083333333333334 [2024-06-27 23:56:28,509 INFO L175 Difference]: Start difference. First operand has 149 places, 228 transitions, 3031 flow. Second operand 6 states and 101 transitions. [2024-06-27 23:56:28,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 241 transitions, 3562 flow [2024-06-27 23:56:28,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 241 transitions, 3525 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-27 23:56:28,678 INFO L231 Difference]: Finished difference. Result has 154 places, 229 transitions, 3067 flow [2024-06-27 23:56:28,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3000, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3067, PETRI_PLACES=154, PETRI_TRANSITIONS=229} [2024-06-27 23:56:28,679 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 113 predicate places. [2024-06-27 23:56:28,679 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 229 transitions, 3067 flow [2024-06-27 23:56:28,679 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 23:56:28,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:56:28,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:56:28,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 23:56:28,679 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:56:28,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:56:28,680 INFO L85 PathProgramCache]: Analyzing trace with hash -338018098, now seen corresponding path program 1 times [2024-06-27 23:56:28,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:56:28,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860517647] [2024-06-27 23:56:28,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:56:28,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:56:28,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:56:30,161 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 23:56:30,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:56:30,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860517647] [2024-06-27 23:56:30,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860517647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:56:30,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:56:30,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:56:30,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964852886] [2024-06-27 23:56:30,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:56:30,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:56:30,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:56:30,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:56:30,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:56:30,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:56:30,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 229 transitions, 3067 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 23:56:30,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:56:30,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:56:30,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:56:31,225 INFO L124 PetriNetUnfolderBase]: 2541/3863 cut-off events. [2024-06-27 23:56:31,225 INFO L125 PetriNetUnfolderBase]: For 120444/120456 co-relation queries the response was YES. [2024-06-27 23:56:31,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26483 conditions, 3863 events. 2541/3863 cut-off events. For 120444/120456 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 19453 event pairs, 784 based on Foata normal form. 12/3875 useless extension candidates. Maximal degree in co-relation 26401. Up to 3535 conditions per place. [2024-06-27 23:56:31,262 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 217 selfloop transitions, 69 changer transitions 0/289 dead transitions. [2024-06-27 23:56:31,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 289 transitions, 4339 flow [2024-06-27 23:56:31,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:56:31,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:56:31,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 23:56:31,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-27 23:56:31,264 INFO L175 Difference]: Start difference. First operand has 154 places, 229 transitions, 3067 flow. Second operand 8 states and 145 transitions. [2024-06-27 23:56:31,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 289 transitions, 4339 flow [2024-06-27 23:56:31,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 289 transitions, 4283 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-27 23:56:31,451 INFO L231 Difference]: Finished difference. Result has 164 places, 259 transitions, 3680 flow [2024-06-27 23:56:31,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3023, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3680, PETRI_PLACES=164, PETRI_TRANSITIONS=259} [2024-06-27 23:56:31,452 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 123 predicate places. [2024-06-27 23:56:31,452 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 259 transitions, 3680 flow [2024-06-27 23:56:31,452 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 23:56:31,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:56:31,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:56:31,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 23:56:31,453 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 23:56:31,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:56:31,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1951109349, now seen corresponding path program 1 times [2024-06-27 23:56:31,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:56:31,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996390895] [2024-06-27 23:56:31,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:56:31,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:56:31,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:56:33,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:56:33,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:56:33,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996390895] [2024-06-27 23:56:33,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996390895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:56:33,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:56:33,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:56:33,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841522996] [2024-06-27 23:56:33,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:56:33,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:56:33,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:56:33,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:56:33,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:56:33,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:56:33,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 259 transitions, 3680 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 23:56:33,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:56:33,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:56:33,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:56:34,426 INFO L124 PetriNetUnfolderBase]: 2650/4035 cut-off events. [2024-06-27 23:56:34,426 INFO L125 PetriNetUnfolderBase]: For 133358/133369 co-relation queries the response was YES. [2024-06-27 23:56:34,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29158 conditions, 4035 events. 2650/4035 cut-off events. For 133358/133369 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 20518 event pairs, 815 based on Foata normal form. 12/4047 useless extension candidates. Maximal degree in co-relation 29070. Up to 3407 conditions per place. [2024-06-27 23:56:34,461 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 202 selfloop transitions, 129 changer transitions 0/334 dead transitions. [2024-06-27 23:56:34,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 334 transitions, 5212 flow [2024-06-27 23:56:34,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:56:34,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:56:34,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 23:56:34,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527777777777778 [2024-06-27 23:56:34,463 INFO L175 Difference]: Start difference. First operand has 164 places, 259 transitions, 3680 flow. Second operand 9 states and 163 transitions. [2024-06-27 23:56:34,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 334 transitions, 5212 flow [2024-06-27 23:56:34,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 334 transitions, 5122 flow, removed 44 selfloop flow, removed 1 redundant places. [2024-06-27 23:56:34,659 INFO L231 Difference]: Finished difference. Result has 174 places, 292 transitions, 4519 flow [2024-06-27 23:56:34,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3606, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4519, PETRI_PLACES=174, PETRI_TRANSITIONS=292} [2024-06-27 23:56:34,660 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 133 predicate places. [2024-06-27 23:56:34,660 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 292 transitions, 4519 flow [2024-06-27 23:56:34,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 23:56:34,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:56:34,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:56:34,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 23:56:34,660 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 23:56:34,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:56:34,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1950900099, now seen corresponding path program 2 times [2024-06-27 23:56:34,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:56:34,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915558306] [2024-06-27 23:56:34,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:56:34,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:56:34,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:56:36,213 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 23:56:36,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:56:36,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915558306] [2024-06-27 23:56:36,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915558306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:56:36,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:56:36,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:56:36,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642722311] [2024-06-27 23:56:36,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:56:36,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:56:36,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:56:36,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:56:36,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:56:36,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:56:36,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 292 transitions, 4519 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 23:56:36,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:56:36,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:56:36,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:56:37,423 INFO L124 PetriNetUnfolderBase]: 2725/4152 cut-off events. [2024-06-27 23:56:37,424 INFO L125 PetriNetUnfolderBase]: For 144823/144831 co-relation queries the response was YES. [2024-06-27 23:56:37,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30673 conditions, 4152 events. 2725/4152 cut-off events. For 144823/144831 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 21300 event pairs, 803 based on Foata normal form. 10/4162 useless extension candidates. Maximal degree in co-relation 30580. Up to 3370 conditions per place. [2024-06-27 23:56:37,461 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 205 selfloop transitions, 136 changer transitions 0/344 dead transitions. [2024-06-27 23:56:37,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 344 transitions, 5753 flow [2024-06-27 23:56:37,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:56:37,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:56:37,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 23:56:37,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 23:56:37,463 INFO L175 Difference]: Start difference. First operand has 174 places, 292 transitions, 4519 flow. Second operand 9 states and 165 transitions. [2024-06-27 23:56:37,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 344 transitions, 5753 flow [2024-06-27 23:56:37,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 344 transitions, 5539 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-27 23:56:37,701 INFO L231 Difference]: Finished difference. Result has 180 places, 301 transitions, 4746 flow [2024-06-27 23:56:37,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4305, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4746, PETRI_PLACES=180, PETRI_TRANSITIONS=301} [2024-06-27 23:56:37,702 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 139 predicate places. [2024-06-27 23:56:37,702 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 301 transitions, 4746 flow [2024-06-27 23:56:37,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 23:56:37,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:56:37,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:56:37,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 23:56:37,702 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:56:37,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:56:37,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1956471729, now seen corresponding path program 3 times [2024-06-27 23:56:37,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:56:37,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602185185] [2024-06-27 23:56:37,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:56:37,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:56:37,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:56:39,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:56:39,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:56:39,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602185185] [2024-06-27 23:56:39,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602185185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:56:39,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:56:39,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:56:39,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669619828] [2024-06-27 23:56:39,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:56:39,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:56:39,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:56:39,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:56:39,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:56:39,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:56:39,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 301 transitions, 4746 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 23:56:39,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:56:39,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:56:39,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:56:40,803 INFO L124 PetriNetUnfolderBase]: 2768/4214 cut-off events. [2024-06-27 23:56:40,803 INFO L125 PetriNetUnfolderBase]: For 153773/153777 co-relation queries the response was YES. [2024-06-27 23:56:40,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31777 conditions, 4214 events. 2768/4214 cut-off events. For 153773/153777 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 21671 event pairs, 845 based on Foata normal form. 8/4222 useless extension candidates. Maximal degree in co-relation 31682. Up to 3567 conditions per place. [2024-06-27 23:56:40,842 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 204 selfloop transitions, 152 changer transitions 0/359 dead transitions. [2024-06-27 23:56:40,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 359 transitions, 6115 flow [2024-06-27 23:56:40,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:56:40,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:56:40,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 23:56:40,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 23:56:40,844 INFO L175 Difference]: Start difference. First operand has 180 places, 301 transitions, 4746 flow. Second operand 9 states and 165 transitions. [2024-06-27 23:56:40,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 359 transitions, 6115 flow [2024-06-27 23:56:41,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 359 transitions, 5894 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-27 23:56:41,118 INFO L231 Difference]: Finished difference. Result has 186 places, 325 transitions, 5486 flow [2024-06-27 23:56:41,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4553, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5486, PETRI_PLACES=186, PETRI_TRANSITIONS=325} [2024-06-27 23:56:41,119 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 145 predicate places. [2024-06-27 23:56:41,119 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 325 transitions, 5486 flow [2024-06-27 23:56:41,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 23:56:41,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:56:41,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:56:41,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 23:56:41,119 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 23:56:41,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:56:41,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1061987740, now seen corresponding path program 2 times [2024-06-27 23:56:41,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:56:41,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278811046] [2024-06-27 23:56:41,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:56:41,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:56:41,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:56:42,770 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 23:56:42,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:56:42,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278811046] [2024-06-27 23:56:42,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278811046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:56:42,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:56:42,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:56:42,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010707422] [2024-06-27 23:56:42,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:56:42,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:56:42,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:56:42,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:56:42,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:56:42,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:56:42,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 325 transitions, 5486 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 23:56:42,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:56:42,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:56:42,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:56:43,991 INFO L124 PetriNetUnfolderBase]: 2820/4280 cut-off events. [2024-06-27 23:56:43,991 INFO L125 PetriNetUnfolderBase]: For 163193/163199 co-relation queries the response was YES. [2024-06-27 23:56:44,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33218 conditions, 4280 events. 2820/4280 cut-off events. For 163193/163199 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 21977 event pairs, 804 based on Foata normal form. 8/4288 useless extension candidates. Maximal degree in co-relation 33119. Up to 3916 conditions per place. [2024-06-27 23:56:44,038 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 283 selfloop transitions, 83 changer transitions 0/369 dead transitions. [2024-06-27 23:56:44,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 369 transitions, 6782 flow [2024-06-27 23:56:44,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:56:44,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:56:44,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 23:56:44,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45625 [2024-06-27 23:56:44,040 INFO L175 Difference]: Start difference. First operand has 186 places, 325 transitions, 5486 flow. Second operand 8 states and 146 transitions. [2024-06-27 23:56:44,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 369 transitions, 6782 flow [2024-06-27 23:56:44,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 369 transitions, 6586 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 23:56:44,310 INFO L231 Difference]: Finished difference. Result has 193 places, 343 transitions, 5784 flow [2024-06-27 23:56:44,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5296, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5784, PETRI_PLACES=193, PETRI_TRANSITIONS=343} [2024-06-27 23:56:44,311 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 152 predicate places. [2024-06-27 23:56:44,311 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 343 transitions, 5784 flow [2024-06-27 23:56:44,312 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 23:56:44,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:56:44,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:56:44,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 23:56:44,312 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 23:56:44,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:56:44,313 INFO L85 PathProgramCache]: Analyzing trace with hash -819963232, now seen corresponding path program 3 times [2024-06-27 23:56:44,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:56:44,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019241049] [2024-06-27 23:56:44,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:56:44,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:56:44,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:56:45,951 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 23:56:45,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:56:45,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019241049] [2024-06-27 23:56:45,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019241049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:56:45,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:56:45,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:56:45,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548967968] [2024-06-27 23:56:45,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:56:45,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:56:45,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:56:45,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:56:45,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:56:46,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:56:46,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 343 transitions, 5784 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 23:56:46,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:56:46,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:56:46,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:56:47,194 INFO L124 PetriNetUnfolderBase]: 2816/4279 cut-off events. [2024-06-27 23:56:47,194 INFO L125 PetriNetUnfolderBase]: For 170132/170139 co-relation queries the response was YES. [2024-06-27 23:56:47,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33437 conditions, 4279 events. 2816/4279 cut-off events. For 170132/170139 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 21988 event pairs, 812 based on Foata normal form. 8/4287 useless extension candidates. Maximal degree in co-relation 33334. Up to 3914 conditions per place. [2024-06-27 23:56:47,233 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 282 selfloop transitions, 80 changer transitions 0/365 dead transitions. [2024-06-27 23:56:47,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 365 transitions, 6774 flow [2024-06-27 23:56:47,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:56:47,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:56:47,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 23:56:47,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 23:56:47,235 INFO L175 Difference]: Start difference. First operand has 193 places, 343 transitions, 5784 flow. Second operand 8 states and 140 transitions. [2024-06-27 23:56:47,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 365 transitions, 6774 flow [2024-06-27 23:56:47,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 365 transitions, 6648 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-27 23:56:47,556 INFO L231 Difference]: Finished difference. Result has 198 places, 343 transitions, 5827 flow [2024-06-27 23:56:47,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5658, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5827, PETRI_PLACES=198, PETRI_TRANSITIONS=343} [2024-06-27 23:56:47,557 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 157 predicate places. [2024-06-27 23:56:47,557 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 343 transitions, 5827 flow [2024-06-27 23:56:47,557 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 23:56:47,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:56:47,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:56:47,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 23:56:47,557 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:56:47,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:56:47,558 INFO L85 PathProgramCache]: Analyzing trace with hash -851358730, now seen corresponding path program 1 times [2024-06-27 23:56:47,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:56:47,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209017120] [2024-06-27 23:56:47,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:56:47,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:56:47,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:56:49,128 INFO 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 23:56:49,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:56:49,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209017120] [2024-06-27 23:56:49,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209017120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:56:49,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:56:49,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:56:49,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934815636] [2024-06-27 23:56:49,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:56:49,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:56:49,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:56:49,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:56:49,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:56:49,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:56:49,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 343 transitions, 5827 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 23:56:49,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:56:49,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:56:49,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:56:50,208 INFO L124 PetriNetUnfolderBase]: 2834/4298 cut-off events. [2024-06-27 23:56:50,208 INFO L125 PetriNetUnfolderBase]: For 179103/179105 co-relation queries the response was YES. [2024-06-27 23:56:50,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33836 conditions, 4298 events. 2834/4298 cut-off events. For 179103/179105 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 22050 event pairs, 982 based on Foata normal form. 4/4302 useless extension candidates. Maximal degree in co-relation 33732. Up to 4186 conditions per place. [2024-06-27 23:56:50,257 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 328 selfloop transitions, 39 changer transitions 0/370 dead transitions. [2024-06-27 23:56:50,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 370 transitions, 6815 flow [2024-06-27 23:56:50,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:56:50,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:56:50,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 23:56:50,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45357142857142857 [2024-06-27 23:56:50,259 INFO L175 Difference]: Start difference. First operand has 198 places, 343 transitions, 5827 flow. Second operand 7 states and 127 transitions. [2024-06-27 23:56:50,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 370 transitions, 6815 flow [2024-06-27 23:56:50,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 370 transitions, 6648 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 23:56:50,631 INFO L231 Difference]: Finished difference. Result has 200 places, 349 transitions, 5855 flow [2024-06-27 23:56:50,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5660, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5855, PETRI_PLACES=200, PETRI_TRANSITIONS=349} [2024-06-27 23:56:50,633 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 159 predicate places. [2024-06-27 23:56:50,633 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 349 transitions, 5855 flow [2024-06-27 23:56:50,633 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 23:56:50,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:56:50,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:56:50,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 23:56:50,633 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 23:56:50,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:56:50,634 INFO L85 PathProgramCache]: Analyzing trace with hash 194449921, now seen corresponding path program 4 times [2024-06-27 23:56:50,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:56:50,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997819843] [2024-06-27 23:56:50,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:56:50,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:56:50,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:56:52,298 INFO 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 23:56:52,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:56:52,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997819843] [2024-06-27 23:56:52,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997819843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:56:52,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:56:52,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:56:52,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422595217] [2024-06-27 23:56:52,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:56:52,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:56:52,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:56:52,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:56:52,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:56:52,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:56:52,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 349 transitions, 5855 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 23:56:52,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:56:52,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:56:52,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:56:53,495 INFO L124 PetriNetUnfolderBase]: 2893/4405 cut-off events. [2024-06-27 23:56:53,496 INFO L125 PetriNetUnfolderBase]: For 190984/190986 co-relation queries the response was YES. [2024-06-27 23:56:53,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34600 conditions, 4405 events. 2893/4405 cut-off events. For 190984/190986 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 22874 event pairs, 1115 based on Foata normal form. 8/4413 useless extension candidates. Maximal degree in co-relation 34497. Up to 3856 conditions per place. [2024-06-27 23:56:53,547 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 244 selfloop transitions, 146 changer transitions 0/393 dead transitions. [2024-06-27 23:56:53,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 393 transitions, 7074 flow [2024-06-27 23:56:53,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:56:53,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:56:53,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 23:56:53,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 23:56:53,549 INFO L175 Difference]: Start difference. First operand has 200 places, 349 transitions, 5855 flow. Second operand 8 states and 144 transitions. [2024-06-27 23:56:53,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 393 transitions, 7074 flow [2024-06-27 23:56:53,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 393 transitions, 6983 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-27 23:56:53,970 INFO L231 Difference]: Finished difference. Result has 206 places, 365 transitions, 6432 flow [2024-06-27 23:56:53,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5764, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6432, PETRI_PLACES=206, PETRI_TRANSITIONS=365} [2024-06-27 23:56:53,970 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 165 predicate places. [2024-06-27 23:56:53,970 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 365 transitions, 6432 flow [2024-06-27 23:56:53,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 23:56:53,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:56:53,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:56:53,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 23:56:53,971 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 23:56:53,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:56:53,972 INFO L85 PathProgramCache]: Analyzing trace with hash 200021551, now seen corresponding path program 5 times [2024-06-27 23:56:53,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:56:53,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583250698] [2024-06-27 23:56:53,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:56:53,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:56:53,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:56:55,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:56:55,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:56:55,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583250698] [2024-06-27 23:56:55,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583250698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:56:55,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:56:55,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:56:55,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658276405] [2024-06-27 23:56:55,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:56:55,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:56:55,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:56:55,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:56:55,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:56:55,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:56:55,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 365 transitions, 6432 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 23:56:55,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:56:55,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:56:55,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:56:56,846 INFO L124 PetriNetUnfolderBase]: 3007/4573 cut-off events. [2024-06-27 23:56:56,846 INFO L125 PetriNetUnfolderBase]: For 206179/206181 co-relation queries the response was YES. [2024-06-27 23:56:56,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37073 conditions, 4573 events. 3007/4573 cut-off events. For 206179/206181 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 23863 event pairs, 1103 based on Foata normal form. 6/4579 useless extension candidates. Maximal degree in co-relation 36966. Up to 3774 conditions per place. [2024-06-27 23:56:56,895 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 256 selfloop transitions, 158 changer transitions 0/417 dead transitions. [2024-06-27 23:56:56,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 417 transitions, 8025 flow [2024-06-27 23:56:56,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:56:56,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:56:56,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 23:56:56,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 23:56:56,897 INFO L175 Difference]: Start difference. First operand has 206 places, 365 transitions, 6432 flow. Second operand 8 states and 144 transitions. [2024-06-27 23:56:56,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 417 transitions, 8025 flow [2024-06-27 23:56:57,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 417 transitions, 7831 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-27 23:56:57,271 INFO L231 Difference]: Finished difference. Result has 212 places, 388 transitions, 7112 flow [2024-06-27 23:56:57,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6253, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7112, PETRI_PLACES=212, PETRI_TRANSITIONS=388} [2024-06-27 23:56:57,273 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 171 predicate places. [2024-06-27 23:56:57,273 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 388 transitions, 7112 flow [2024-06-27 23:56:57,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 23:56:57,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:56:57,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:56:57,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 23:56:57,273 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:56:57,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:56:57,274 INFO L85 PathProgramCache]: Analyzing trace with hash 200014111, now seen corresponding path program 6 times [2024-06-27 23:56:57,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:56:57,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760037605] [2024-06-27 23:56:57,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:56:57,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:56:57,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:56:58,985 INFO 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 23:56:58,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:56:58,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760037605] [2024-06-27 23:56:58,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760037605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:56:58,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:56:58,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:56:58,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501093848] [2024-06-27 23:56:58,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:56:58,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:56:58,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:56:58,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:56:58,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:56:59,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:56:59,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 388 transitions, 7112 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 23:56:59,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:56:59,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:56:59,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:57:00,199 INFO L124 PetriNetUnfolderBase]: 2999/4568 cut-off events. [2024-06-27 23:57:00,199 INFO L125 PetriNetUnfolderBase]: For 215424/215426 co-relation queries the response was YES. [2024-06-27 23:57:00,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37446 conditions, 4568 events. 2999/4568 cut-off events. For 215424/215426 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 23967 event pairs, 1118 based on Foata normal form. 6/4574 useless extension candidates. Maximal degree in co-relation 37337. Up to 3996 conditions per place. [2024-06-27 23:57:00,254 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 265 selfloop transitions, 149 changer transitions 0/417 dead transitions. [2024-06-27 23:57:00,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 417 transitions, 8104 flow [2024-06-27 23:57:00,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:57:00,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:57:00,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 23:57:00,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-27 23:57:00,256 INFO L175 Difference]: Start difference. First operand has 212 places, 388 transitions, 7112 flow. Second operand 8 states and 142 transitions. [2024-06-27 23:57:00,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 417 transitions, 8104 flow [2024-06-27 23:57:00,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 417 transitions, 8007 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-27 23:57:00,657 INFO L231 Difference]: Finished difference. Result has 218 places, 388 transitions, 7325 flow [2024-06-27 23:57:00,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7015, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7325, PETRI_PLACES=218, PETRI_TRANSITIONS=388} [2024-06-27 23:57:00,658 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 177 predicate places. [2024-06-27 23:57:00,658 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 388 transitions, 7325 flow [2024-06-27 23:57:00,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 23:57:00,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:57:00,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:57:00,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 23:57:00,659 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 23:57:00,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:57:00,659 INFO L85 PathProgramCache]: Analyzing trace with hash 945519838, now seen corresponding path program 4 times [2024-06-27 23:57:00,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:57:00,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259277998] [2024-06-27 23:57:00,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:57:00,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:57:00,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:57:01,943 INFO 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 23:57:01,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:57:01,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259277998] [2024-06-27 23:57:01,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259277998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:57:01,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:57:01,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:57:01,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204861893] [2024-06-27 23:57:01,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:57:01,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:57:01,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:57:01,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:57:01,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:57:02,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:57:02,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 388 transitions, 7325 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 23:57:02,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:57:02,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:57:02,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:57:03,115 INFO L124 PetriNetUnfolderBase]: 3146/4772 cut-off events. [2024-06-27 23:57:03,115 INFO L125 PetriNetUnfolderBase]: For 238510/238514 co-relation queries the response was YES. [2024-06-27 23:57:03,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39686 conditions, 4772 events. 3146/4772 cut-off events. For 238510/238514 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 25083 event pairs, 1167 based on Foata normal form. 10/4782 useless extension candidates. Maximal degree in co-relation 39575. Up to 4321 conditions per place. [2024-06-27 23:57:03,162 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 355 selfloop transitions, 91 changer transitions 0/449 dead transitions. [2024-06-27 23:57:03,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 449 transitions, 8973 flow [2024-06-27 23:57:03,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:57:03,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:57:03,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 23:57:03,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-06-27 23:57:03,164 INFO L175 Difference]: Start difference. First operand has 218 places, 388 transitions, 7325 flow. Second operand 7 states and 132 transitions. [2024-06-27 23:57:03,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 449 transitions, 8973 flow [2024-06-27 23:57:03,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 449 transitions, 8578 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 23:57:03,602 INFO L231 Difference]: Finished difference. Result has 221 places, 422 transitions, 7735 flow [2024-06-27 23:57:03,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6934, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7735, PETRI_PLACES=221, PETRI_TRANSITIONS=422} [2024-06-27 23:57:03,604 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 180 predicate places. [2024-06-27 23:57:03,604 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 422 transitions, 7735 flow [2024-06-27 23:57:03,604 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 23:57:03,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:57:03,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:57:03,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 23:57:03,605 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 23:57:03,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:57:03,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1722631750, now seen corresponding path program 5 times [2024-06-27 23:57:03,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:57:03,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666368003] [2024-06-27 23:57:03,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:57:03,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:57:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:57:04,906 INFO 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 23:57:04,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:57:04,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666368003] [2024-06-27 23:57:04,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666368003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:57:04,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:57:04,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:57:04,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356143464] [2024-06-27 23:57:04,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:57:04,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:57:04,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:57:04,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:57:04,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:57:04,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:57:04,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 422 transitions, 7735 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 23:57:04,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:57:04,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:57:04,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:57:06,004 INFO L124 PetriNetUnfolderBase]: 3174/4810 cut-off events. [2024-06-27 23:57:06,004 INFO L125 PetriNetUnfolderBase]: For 246628/246632 co-relation queries the response was YES. [2024-06-27 23:57:06,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41054 conditions, 4810 events. 3174/4810 cut-off events. For 246628/246632 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 25318 event pairs, 1173 based on Foata normal form. 6/4816 useless extension candidates. Maximal degree in co-relation 40938. Up to 4509 conditions per place. [2024-06-27 23:57:06,064 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 370 selfloop transitions, 77 changer transitions 0/450 dead transitions. [2024-06-27 23:57:06,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 450 transitions, 9052 flow [2024-06-27 23:57:06,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:57:06,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:57:06,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 23:57:06,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43214285714285716 [2024-06-27 23:57:06,066 INFO L175 Difference]: Start difference. First operand has 221 places, 422 transitions, 7735 flow. Second operand 7 states and 121 transitions. [2024-06-27 23:57:06,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 450 transitions, 9052 flow [2024-06-27 23:57:06,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 450 transitions, 8953 flow, removed 48 selfloop flow, removed 1 redundant places. [2024-06-27 23:57:06,564 INFO L231 Difference]: Finished difference. Result has 229 places, 436 transitions, 8097 flow [2024-06-27 23:57:06,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7636, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8097, PETRI_PLACES=229, PETRI_TRANSITIONS=436} [2024-06-27 23:57:06,565 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 188 predicate places. [2024-06-27 23:57:06,565 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 436 transitions, 8097 flow [2024-06-27 23:57:06,565 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 23:57:06,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:57:06,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:57:06,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 23:57:06,566 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:57:06,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:57:06,566 INFO L85 PathProgramCache]: Analyzing trace with hash 945818740, now seen corresponding path program 2 times [2024-06-27 23:57:06,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:57:06,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006435669] [2024-06-27 23:57:06,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:57:06,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:57:06,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:57:08,243 INFO 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 23:57:08,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:57:08,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006435669] [2024-06-27 23:57:08,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006435669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:57:08,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:57:08,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:57:08,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403180620] [2024-06-27 23:57:08,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:57:08,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:57:08,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:57:08,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:57:08,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:57:08,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:57:08,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 436 transitions, 8097 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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 23:57:08,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:57:08,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:57:08,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:57:09,530 INFO L124 PetriNetUnfolderBase]: 3184/4818 cut-off events. [2024-06-27 23:57:09,531 INFO L125 PetriNetUnfolderBase]: For 257888/257888 co-relation queries the response was YES. [2024-06-27 23:57:09,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41708 conditions, 4818 events. 3184/4818 cut-off events. For 257888/257888 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 25289 event pairs, 1194 based on Foata normal form. 2/4820 useless extension candidates. Maximal degree in co-relation 41587. Up to 4702 conditions per place. [2024-06-27 23:57:09,587 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 415 selfloop transitions, 37 changer transitions 0/455 dead transitions. [2024-06-27 23:57:09,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 455 transitions, 9211 flow [2024-06-27 23:57:09,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:57:09,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:57:09,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 23:57:09,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39375 [2024-06-27 23:57:09,593 INFO L175 Difference]: Start difference. First operand has 229 places, 436 transitions, 8097 flow. Second operand 8 states and 126 transitions. [2024-06-27 23:57:09,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 455 transitions, 9211 flow [2024-06-27 23:57:10,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 455 transitions, 9124 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-27 23:57:10,221 INFO L231 Difference]: Finished difference. Result has 235 places, 440 transitions, 8164 flow [2024-06-27 23:57:10,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8010, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8164, PETRI_PLACES=235, PETRI_TRANSITIONS=440} [2024-06-27 23:57:10,222 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 194 predicate places. [2024-06-27 23:57:10,222 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 440 transitions, 8164 flow [2024-06-27 23:57:10,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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 23:57:10,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:57:10,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:57:10,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 23:57:10,223 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 23:57:10,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:57:10,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1916811573, now seen corresponding path program 7 times [2024-06-27 23:57:10,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:57:10,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759775642] [2024-06-27 23:57:10,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:57:10,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:57:10,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:57:11,736 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 23:57:11,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:57:11,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759775642] [2024-06-27 23:57:11,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759775642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:57:11,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:57:11,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:57:11,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648131711] [2024-06-27 23:57:11,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:57:11,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:57:11,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:57:11,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:57:11,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:57:11,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:57:11,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 440 transitions, 8164 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 23:57:11,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:57:11,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:57:11,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:57:13,009 INFO L124 PetriNetUnfolderBase]: 3201/4845 cut-off events. [2024-06-27 23:57:13,009 INFO L125 PetriNetUnfolderBase]: For 267851/267853 co-relation queries the response was YES. [2024-06-27 23:57:13,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42009 conditions, 4845 events. 3201/4845 cut-off events. For 267851/267853 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 25407 event pairs, 1174 based on Foata normal form. 6/4851 useless extension candidates. Maximal degree in co-relation 41886. Up to 4691 conditions per place. [2024-06-27 23:57:13,070 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 442 selfloop transitions, 22 changer transitions 0/467 dead transitions. [2024-06-27 23:57:13,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 467 transitions, 9254 flow [2024-06-27 23:57:13,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:57:13,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:57:13,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-27 23:57:13,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39444444444444443 [2024-06-27 23:57:13,073 INFO L175 Difference]: Start difference. First operand has 235 places, 440 transitions, 8164 flow. Second operand 9 states and 142 transitions. [2024-06-27 23:57:13,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 467 transitions, 9254 flow [2024-06-27 23:57:13,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 467 transitions, 9167 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 23:57:13,740 INFO L231 Difference]: Finished difference. Result has 240 places, 442 transitions, 8192 flow [2024-06-27 23:57:13,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8077, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8192, PETRI_PLACES=240, PETRI_TRANSITIONS=442} [2024-06-27 23:57:13,741 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 199 predicate places. [2024-06-27 23:57:13,741 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 442 transitions, 8192 flow [2024-06-27 23:57:13,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 23:57:13,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:57:13,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:57:13,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 23:57:13,742 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 23:57:13,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:57:13,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1970744399, now seen corresponding path program 8 times [2024-06-27 23:57:13,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:57:13,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620531768] [2024-06-27 23:57:13,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:57:13,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:57:13,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:57:15,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:57:15,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:57:15,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620531768] [2024-06-27 23:57:15,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620531768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:57:15,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:57:15,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:57:15,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270258858] [2024-06-27 23:57:15,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:57:15,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:57:15,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:57:15,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:57:15,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:57:15,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:57:15,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 442 transitions, 8192 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 23:57:15,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:57:15,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:57:15,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:57:16,378 INFO L124 PetriNetUnfolderBase]: 3218/4881 cut-off events. [2024-06-27 23:57:16,378 INFO L125 PetriNetUnfolderBase]: For 280178/280180 co-relation queries the response was YES. [2024-06-27 23:57:16,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42525 conditions, 4881 events. 3218/4881 cut-off events. For 280178/280180 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 25795 event pairs, 1162 based on Foata normal form. 6/4887 useless extension candidates. Maximal degree in co-relation 42402. Up to 4485 conditions per place. [2024-06-27 23:57:16,443 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 361 selfloop transitions, 106 changer transitions 0/470 dead transitions. [2024-06-27 23:57:16,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 470 transitions, 9312 flow [2024-06-27 23:57:16,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:57:16,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:57:16,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 23:57:16,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446875 [2024-06-27 23:57:16,445 INFO L175 Difference]: Start difference. First operand has 240 places, 442 transitions, 8192 flow. Second operand 8 states and 143 transitions. [2024-06-27 23:57:16,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 470 transitions, 9312 flow [2024-06-27 23:57:17,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 470 transitions, 9215 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-27 23:57:17,040 INFO L231 Difference]: Finished difference. Result has 241 places, 444 transitions, 8382 flow [2024-06-27 23:57:17,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8095, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8382, PETRI_PLACES=241, PETRI_TRANSITIONS=444} [2024-06-27 23:57:17,041 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 200 predicate places. [2024-06-27 23:57:17,041 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 444 transitions, 8382 flow [2024-06-27 23:57:17,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 23:57:17,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:57:17,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:57:17,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 23:57:17,043 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:57:17,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:57:17,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1714243889, now seen corresponding path program 9 times [2024-06-27 23:57:17,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:57:17,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835389043] [2024-06-27 23:57:17,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:57:17,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:57:17,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:57:18,514 INFO 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 23:57:18,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:57:18,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835389043] [2024-06-27 23:57:18,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835389043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:57:18,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:57:18,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:57:18,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490960757] [2024-06-27 23:57:18,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:57:18,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:57:18,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:57:18,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:57:18,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:57:18,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:57:18,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 444 transitions, 8382 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 23:57:18,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:57:18,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:57:18,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:57:20,018 INFO L124 PetriNetUnfolderBase]: 3235/4906 cut-off events. [2024-06-27 23:57:20,019 INFO L125 PetriNetUnfolderBase]: For 292813/292815 co-relation queries the response was YES. [2024-06-27 23:57:20,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43305 conditions, 4906 events. 3235/4906 cut-off events. For 292813/292815 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 25920 event pairs, 1151 based on Foata normal form. 6/4912 useless extension candidates. Maximal degree in co-relation 43181. Up to 4269 conditions per place. [2024-06-27 23:57:20,071 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 298 selfloop transitions, 166 changer transitions 0/467 dead transitions. [2024-06-27 23:57:20,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 467 transitions, 9472 flow [2024-06-27 23:57:20,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:57:20,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:57:20,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 23:57:20,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 23:57:20,072 INFO L175 Difference]: Start difference. First operand has 241 places, 444 transitions, 8382 flow. Second operand 8 states and 136 transitions. [2024-06-27 23:57:20,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 467 transitions, 9472 flow [2024-06-27 23:57:20,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 467 transitions, 9263 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-27 23:57:20,678 INFO L231 Difference]: Finished difference. Result has 244 places, 446 transitions, 8604 flow [2024-06-27 23:57:20,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8173, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8604, PETRI_PLACES=244, PETRI_TRANSITIONS=446} [2024-06-27 23:57:20,679 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 203 predicate places. [2024-06-27 23:57:20,679 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 446 transitions, 8604 flow [2024-06-27 23:57:20,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 23:57:20,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:57:20,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:57:20,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 23:57:20,680 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:57:20,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:57:20,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1714251329, now seen corresponding path program 10 times [2024-06-27 23:57:20,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:57:20,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115208270] [2024-06-27 23:57:20,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:57:20,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:57:20,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:57:22,360 INFO 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 23:57:22,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:57:22,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115208270] [2024-06-27 23:57:22,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115208270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:57:22,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:57:22,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:57:22,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212217758] [2024-06-27 23:57:22,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:57:22,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:57:22,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:57:22,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:57:22,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:57:22,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:57:22,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 446 transitions, 8604 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 23:57:22,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:57:22,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:57:22,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:57:23,600 INFO L124 PetriNetUnfolderBase]: 3252/4925 cut-off events. [2024-06-27 23:57:23,600 INFO L125 PetriNetUnfolderBase]: For 307729/307731 co-relation queries the response was YES. [2024-06-27 23:57:23,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43994 conditions, 4925 events. 3252/4925 cut-off events. For 307729/307731 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 25962 event pairs, 1155 based on Foata normal form. 6/4931 useless extension candidates. Maximal degree in co-relation 43869. Up to 4065 conditions per place. [2024-06-27 23:57:23,668 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 307 selfloop transitions, 158 changer transitions 0/468 dead transitions. [2024-06-27 23:57:23,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 468 transitions, 9682 flow [2024-06-27 23:57:23,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:57:23,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:57:23,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 23:57:23,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-27 23:57:23,670 INFO L175 Difference]: Start difference. First operand has 244 places, 446 transitions, 8604 flow. Second operand 8 states and 133 transitions. [2024-06-27 23:57:23,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 468 transitions, 9682 flow [2024-06-27 23:57:24,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 468 transitions, 9313 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-27 23:57:24,341 INFO L231 Difference]: Finished difference. Result has 245 places, 448 transitions, 8644 flow [2024-06-27 23:57:24,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8235, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8644, PETRI_PLACES=245, PETRI_TRANSITIONS=448} [2024-06-27 23:57:24,342 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 204 predicate places. [2024-06-27 23:57:24,342 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 448 transitions, 8644 flow [2024-06-27 23:57:24,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 23:57:24,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:57:24,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:57:24,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 23:57:24,343 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:57:24,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:57:24,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1970751839, now seen corresponding path program 11 times [2024-06-27 23:57:24,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:57:24,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873861327] [2024-06-27 23:57:24,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:57:24,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:57:24,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:57:25,923 INFO 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 23:57:25,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:57:25,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873861327] [2024-06-27 23:57:25,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873861327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:57:25,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:57:25,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:57:25,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750286214] [2024-06-27 23:57:25,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:57:25,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:57:25,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:57:25,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:57:25,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:57:26,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:57:26,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 448 transitions, 8644 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 23:57:26,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:57:26,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:57:26,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:57:27,301 INFO L124 PetriNetUnfolderBase]: 3244/4913 cut-off events. [2024-06-27 23:57:27,301 INFO L125 PetriNetUnfolderBase]: For 304542/304544 co-relation queries the response was YES. [2024-06-27 23:57:27,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43775 conditions, 4913 events. 3244/4913 cut-off events. For 304542/304544 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 25897 event pairs, 1152 based on Foata normal form. 4/4917 useless extension candidates. Maximal degree in co-relation 43650. Up to 3967 conditions per place. [2024-06-27 23:57:27,355 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 297 selfloop transitions, 171 changer transitions 0/471 dead transitions. [2024-06-27 23:57:27,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 471 transitions, 9742 flow [2024-06-27 23:57:27,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:57:27,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:57:27,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 23:57:27,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 23:57:27,357 INFO L175 Difference]: Start difference. First operand has 245 places, 448 transitions, 8644 flow. Second operand 7 states and 126 transitions. [2024-06-27 23:57:27,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 471 transitions, 9742 flow [2024-06-27 23:57:27,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 471 transitions, 9379 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 23:57:28,002 INFO L231 Difference]: Finished difference. Result has 246 places, 450 transitions, 8723 flow [2024-06-27 23:57:28,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8281, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8723, PETRI_PLACES=246, PETRI_TRANSITIONS=450} [2024-06-27 23:57:28,002 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 205 predicate places. [2024-06-27 23:57:28,003 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 450 transitions, 8723 flow [2024-06-27 23:57:28,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 23:57:28,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:57:28,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:57:28,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 23:57:28,003 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 23:57:28,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:57:28,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1214273820, now seen corresponding path program 3 times [2024-06-27 23:57:28,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:57:28,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522342547] [2024-06-27 23:57:28,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:57:28,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:57:28,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:57:29,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:57:29,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:57:29,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522342547] [2024-06-27 23:57:29,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522342547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:57:29,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:57:29,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:57:29,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326967948] [2024-06-27 23:57:29,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:57:29,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:57:29,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:57:29,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:57:29,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:57:29,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:57:29,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 450 transitions, 8723 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 23:57:29,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:57:29,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:57:29,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:57:30,699 INFO L124 PetriNetUnfolderBase]: 3235/4899 cut-off events. [2024-06-27 23:57:30,700 INFO L125 PetriNetUnfolderBase]: For 310626/310626 co-relation queries the response was YES. [2024-06-27 23:57:30,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43824 conditions, 4899 events. 3235/4899 cut-off events. For 310626/310626 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 25826 event pairs, 1211 based on Foata normal form. 3/4902 useless extension candidates. Maximal degree in co-relation 43698. Up to 4826 conditions per place. [2024-06-27 23:57:30,759 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 439 selfloop transitions, 21 changer transitions 0/463 dead transitions. [2024-06-27 23:57:30,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 463 transitions, 9743 flow [2024-06-27 23:57:30,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:57:30,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:57:30,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2024-06-27 23:57:30,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.365625 [2024-06-27 23:57:30,760 INFO L175 Difference]: Start difference. First operand has 246 places, 450 transitions, 8723 flow. Second operand 8 states and 117 transitions. [2024-06-27 23:57:30,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 463 transitions, 9743 flow [2024-06-27 23:57:31,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 463 transitions, 9333 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-27 23:57:31,466 INFO L231 Difference]: Finished difference. Result has 249 places, 453 transitions, 8435 flow [2024-06-27 23:57:31,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8313, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8435, PETRI_PLACES=249, PETRI_TRANSITIONS=453} [2024-06-27 23:57:31,466 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 208 predicate places. [2024-06-27 23:57:31,466 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 453 transitions, 8435 flow [2024-06-27 23:57:31,467 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 23:57:31,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:57:31,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:57:31,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 23:57:31,467 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 23:57:31,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:57:31,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1213858110, now seen corresponding path program 4 times [2024-06-27 23:57:31,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:57:31,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036548364] [2024-06-27 23:57:31,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:57:31,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:57:31,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:57:32,883 INFO 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 23:57:32,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:57:32,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036548364] [2024-06-27 23:57:32,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036548364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:57:32,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:57:32,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:57:32,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680166756] [2024-06-27 23:57:32,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:57:32,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:57:32,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:57:32,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:57:32,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:57:32,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:57:32,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 453 transitions, 8435 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 23:57:32,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:57:32,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:57:32,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:57:34,141 INFO L124 PetriNetUnfolderBase]: 3229/4891 cut-off events. [2024-06-27 23:57:34,141 INFO L125 PetriNetUnfolderBase]: For 299899/299899 co-relation queries the response was YES. [2024-06-27 23:57:34,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43014 conditions, 4891 events. 3229/4891 cut-off events. For 299899/299899 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 25749 event pairs, 1210 based on Foata normal form. 2/4893 useless extension candidates. Maximal degree in co-relation 42887. Up to 4815 conditions per place. [2024-06-27 23:57:34,202 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 440 selfloop transitions, 21 changer transitions 0/464 dead transitions. [2024-06-27 23:57:34,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 464 transitions, 9399 flow [2024-06-27 23:57:34,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:57:34,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:57:34,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-27 23:57:34,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.371875 [2024-06-27 23:57:34,204 INFO L175 Difference]: Start difference. First operand has 249 places, 453 transitions, 8435 flow. Second operand 8 states and 119 transitions. [2024-06-27 23:57:34,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 464 transitions, 9399 flow [2024-06-27 23:57:34,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 464 transitions, 9262 flow, removed 41 selfloop flow, removed 8 redundant places. [2024-06-27 23:57:34,879 INFO L231 Difference]: Finished difference. Result has 249 places, 453 transitions, 8346 flow [2024-06-27 23:57:34,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8298, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8346, PETRI_PLACES=249, PETRI_TRANSITIONS=453} [2024-06-27 23:57:34,880 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 208 predicate places. [2024-06-27 23:57:34,880 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 453 transitions, 8346 flow [2024-06-27 23:57:34,880 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 23:57:34,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:57:34,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:57:34,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 23:57:34,881 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 23:57:34,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:57:34,881 INFO L85 PathProgramCache]: Analyzing trace with hash 2076894790, now seen corresponding path program 6 times [2024-06-27 23:57:34,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:57:34,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507042465] [2024-06-27 23:57:34,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:57:34,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:57:34,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:57:35,996 INFO 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 23:57:35,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:57:35,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507042465] [2024-06-27 23:57:35,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507042465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:57:35,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:57:35,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:57:35,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362152427] [2024-06-27 23:57:35,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:57:35,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:57:36,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:57:36,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:57:36,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:57:36,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:57:36,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 453 transitions, 8346 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 23:57:36,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:57:36,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:57:36,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:57:37,204 INFO L124 PetriNetUnfolderBase]: 3225/4887 cut-off events. [2024-06-27 23:57:37,204 INFO L125 PetriNetUnfolderBase]: For 305787/305791 co-relation queries the response was YES. [2024-06-27 23:57:37,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42954 conditions, 4887 events. 3225/4887 cut-off events. For 305787/305791 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 25764 event pairs, 1201 based on Foata normal form. 6/4893 useless extension candidates. Maximal degree in co-relation 42828. Up to 4787 conditions per place. [2024-06-27 23:57:37,270 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 431 selfloop transitions, 29 changer transitions 0/463 dead transitions. [2024-06-27 23:57:37,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 463 transitions, 9398 flow [2024-06-27 23:57:37,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:57:37,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:57:37,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-27 23:57:37,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-27 23:57:37,272 INFO L175 Difference]: Start difference. First operand has 249 places, 453 transitions, 8346 flow. Second operand 7 states and 113 transitions. [2024-06-27 23:57:37,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 463 transitions, 9398 flow [2024-06-27 23:57:38,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 463 transitions, 9311 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 23:57:38,065 INFO L231 Difference]: Finished difference. Result has 250 places, 453 transitions, 8325 flow [2024-06-27 23:57:38,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8259, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8325, PETRI_PLACES=250, PETRI_TRANSITIONS=453} [2024-06-27 23:57:38,066 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 209 predicate places. [2024-06-27 23:57:38,066 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 453 transitions, 8325 flow [2024-06-27 23:57:38,066 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 23:57:38,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:57:38,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:57:38,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 23:57:38,067 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 23:57:38,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:57:38,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1499925350, now seen corresponding path program 1 times [2024-06-27 23:57:38,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:57:38,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980178474] [2024-06-27 23:57:38,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:57:38,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:57:38,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:57:39,818 INFO 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 23:57:39,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:57:39,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980178474] [2024-06-27 23:57:39,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980178474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:57:39,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:57:39,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:57:39,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203422166] [2024-06-27 23:57:39,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:57:39,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:57:39,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:57:39,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:57:39,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:57:39,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:57:39,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 453 transitions, 8325 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 23:57:39,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:57:39,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:57:39,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:57:41,280 INFO L124 PetriNetUnfolderBase]: 3235/4901 cut-off events. [2024-06-27 23:57:41,280 INFO L125 PetriNetUnfolderBase]: For 316068/316068 co-relation queries the response was YES. [2024-06-27 23:57:41,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43193 conditions, 4901 events. 3235/4901 cut-off events. For 316068/316068 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 25811 event pairs, 1205 based on Foata normal form. 2/4903 useless extension candidates. Maximal degree in co-relation 43066. Up to 4805 conditions per place. [2024-06-27 23:57:41,332 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 447 selfloop transitions, 21 changer transitions 0/471 dead transitions. [2024-06-27 23:57:41,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 471 transitions, 9347 flow [2024-06-27 23:57:41,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:57:41,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:57:41,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-27 23:57:41,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.384375 [2024-06-27 23:57:41,334 INFO L175 Difference]: Start difference. First operand has 250 places, 453 transitions, 8325 flow. Second operand 8 states and 123 transitions. [2024-06-27 23:57:41,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 471 transitions, 9347 flow [2024-06-27 23:57:41,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 471 transitions, 9276 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 23:57:41,949 INFO L231 Difference]: Finished difference. Result has 254 places, 456 transitions, 8337 flow [2024-06-27 23:57:41,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8254, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8337, PETRI_PLACES=254, PETRI_TRANSITIONS=456} [2024-06-27 23:57:41,950 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 213 predicate places. [2024-06-27 23:57:41,950 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 456 transitions, 8337 flow [2024-06-27 23:57:41,950 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 23:57:41,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:57:41,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:57:41,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 23:57:41,950 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 23:57:41,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:57:41,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1476680198, now seen corresponding path program 2 times [2024-06-27 23:57:41,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:57:41,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313070357] [2024-06-27 23:57:41,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:57:41,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:57:41,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:57:43,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:57:43,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:57:43,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313070357] [2024-06-27 23:57:43,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313070357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:57:43,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:57:43,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:57:43,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841097668] [2024-06-27 23:57:43,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:57:43,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:57:43,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:57:43,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:57:43,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:57:43,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:57:43,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 456 transitions, 8337 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 23:57:43,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:57:43,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:57:43,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:57:45,146 INFO L124 PetriNetUnfolderBase]: 3297/4987 cut-off events. [2024-06-27 23:57:45,146 INFO L125 PetriNetUnfolderBase]: For 336217/336217 co-relation queries the response was YES. [2024-06-27 23:57:45,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44321 conditions, 4987 events. 3297/4987 cut-off events. For 336217/336217 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 26247 event pairs, 1216 based on Foata normal form. 6/4993 useless extension candidates. Maximal degree in co-relation 44193. Up to 4769 conditions per place. [2024-06-27 23:57:45,215 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 442 selfloop transitions, 44 changer transitions 0/489 dead transitions. [2024-06-27 23:57:45,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 489 transitions, 9754 flow [2024-06-27 23:57:45,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:57:45,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:57:45,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 23:57:45,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45357142857142857 [2024-06-27 23:57:45,217 INFO L175 Difference]: Start difference. First operand has 254 places, 456 transitions, 8337 flow. Second operand 7 states and 127 transitions. [2024-06-27 23:57:45,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 489 transitions, 9754 flow [2024-06-27 23:57:45,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 489 transitions, 9681 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 23:57:45,989 INFO L231 Difference]: Finished difference. Result has 255 places, 465 transitions, 8486 flow [2024-06-27 23:57:45,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8264, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8486, PETRI_PLACES=255, PETRI_TRANSITIONS=465} [2024-06-27 23:57:45,990 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 214 predicate places. [2024-06-27 23:57:45,990 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 465 transitions, 8486 flow [2024-06-27 23:57:45,990 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 23:57:45,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:57:45,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:57:45,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 23:57:45,991 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 23:57:45,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:57:45,991 INFO L85 PathProgramCache]: Analyzing trace with hash -2086203370, now seen corresponding path program 3 times [2024-06-27 23:57:45,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:57:45,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362244493] [2024-06-27 23:57:45,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:57:45,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:57:46,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:57:47,641 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 23:57:47,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:57:47,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362244493] [2024-06-27 23:57:47,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362244493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:57:47,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:57:47,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:57:47,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461676503] [2024-06-27 23:57:47,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:57:47,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:57:47,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:57:47,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:57:47,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:57:47,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:57:47,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 465 transitions, 8486 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 23:57:47,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:57:47,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:57:47,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:57:49,084 INFO L124 PetriNetUnfolderBase]: 3279/4964 cut-off events. [2024-06-27 23:57:49,084 INFO L125 PetriNetUnfolderBase]: For 339347/339349 co-relation queries the response was YES. [2024-06-27 23:57:49,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44389 conditions, 4964 events. 3279/4964 cut-off events. For 339347/339349 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 26184 event pairs, 1211 based on Foata normal form. 6/4970 useless extension candidates. Maximal degree in co-relation 44261. Up to 4758 conditions per place. [2024-06-27 23:57:49,151 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 436 selfloop transitions, 44 changer transitions 0/483 dead transitions. [2024-06-27 23:57:49,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 483 transitions, 9639 flow [2024-06-27 23:57:49,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:57:49,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:57:49,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 23:57:49,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43214285714285716 [2024-06-27 23:57:49,152 INFO L175 Difference]: Start difference. First operand has 255 places, 465 transitions, 8486 flow. Second operand 7 states and 121 transitions. [2024-06-27 23:57:49,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 483 transitions, 9639 flow [2024-06-27 23:57:49,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 483 transitions, 9578 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-27 23:57:49,862 INFO L231 Difference]: Finished difference. Result has 260 places, 465 transitions, 8521 flow [2024-06-27 23:57:49,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8425, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8521, PETRI_PLACES=260, PETRI_TRANSITIONS=465} [2024-06-27 23:57:49,863 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 219 predicate places. [2024-06-27 23:57:49,863 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 465 transitions, 8521 flow [2024-06-27 23:57:49,863 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 23:57:49,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:57:49,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:57:49,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 23:57:49,864 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 23:57:49,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:57:49,864 INFO L85 PathProgramCache]: Analyzing trace with hash 2077325752, now seen corresponding path program 1 times [2024-06-27 23:57:49,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:57:49,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835392161] [2024-06-27 23:57:49,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:57:49,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:57:49,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:57:52,558 INFO 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 23:57:52,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:57:52,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835392161] [2024-06-27 23:57:52,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835392161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:57:52,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:57:52,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:57:52,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518684559] [2024-06-27 23:57:52,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:57:52,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:57:52,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:57:52,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:57:52,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:57:52,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:57:52,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 465 transitions, 8521 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 23:57:52,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:57:52,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:57:52,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:57:54,035 INFO L124 PetriNetUnfolderBase]: 3274/4955 cut-off events. [2024-06-27 23:57:54,037 INFO L125 PetriNetUnfolderBase]: For 340639/340639 co-relation queries the response was YES. [2024-06-27 23:57:54,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44373 conditions, 4955 events. 3274/4955 cut-off events. For 340639/340639 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 26038 event pairs, 1209 based on Foata normal form. 2/4957 useless extension candidates. Maximal degree in co-relation 44242. Up to 4885 conditions per place. [2024-06-27 23:57:54,111 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 457 selfloop transitions, 17 changer transitions 0/477 dead transitions. [2024-06-27 23:57:54,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 477 transitions, 9543 flow [2024-06-27 23:57:54,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:57:54,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:57:54,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 116 transitions. [2024-06-27 23:57:54,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3625 [2024-06-27 23:57:54,113 INFO L175 Difference]: Start difference. First operand has 260 places, 465 transitions, 8521 flow. Second operand 8 states and 116 transitions. [2024-06-27 23:57:54,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 477 transitions, 9543 flow [2024-06-27 23:57:54,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 477 transitions, 9373 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-27 23:57:54,967 INFO L231 Difference]: Finished difference. Result has 260 places, 467 transitions, 8436 flow [2024-06-27 23:57:54,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8351, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8436, PETRI_PLACES=260, PETRI_TRANSITIONS=467} [2024-06-27 23:57:54,968 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 219 predicate places. [2024-06-27 23:57:54,968 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 467 transitions, 8436 flow [2024-06-27 23:57:54,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 23:57:54,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:57:54,968 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 23:57:54,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 23:57:54,968 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:57:54,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:57:54,969 INFO L85 PathProgramCache]: Analyzing trace with hash 832401947, now seen corresponding path program 1 times [2024-06-27 23:57:54,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:57:54,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745531405] [2024-06-27 23:57:54,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:57:54,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:57:54,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:57:56,354 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 23:57:56,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:57:56,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745531405] [2024-06-27 23:57:56,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745531405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:57:56,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:57:56,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:57:56,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623653355] [2024-06-27 23:57:56,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:57:56,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:57:56,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:57:56,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:57:56,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:57:56,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:57:56,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 467 transitions, 8436 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:57:56,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:57:56,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:57:56,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:57:57,682 INFO L124 PetriNetUnfolderBase]: 3311/5004 cut-off events. [2024-06-27 23:57:57,683 INFO L125 PetriNetUnfolderBase]: For 350456/350465 co-relation queries the response was YES. [2024-06-27 23:57:57,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44748 conditions, 5004 events. 3311/5004 cut-off events. For 350456/350465 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 26350 event pairs, 698 based on Foata normal form. 10/5014 useless extension candidates. Maximal degree in co-relation 44619. Up to 4429 conditions per place. [2024-06-27 23:57:57,746 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 387 selfloop transitions, 125 changer transitions 0/515 dead transitions. [2024-06-27 23:57:57,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 515 transitions, 9995 flow [2024-06-27 23:57:57,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:57:57,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:57:57,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 23:57:57,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465625 [2024-06-27 23:57:57,747 INFO L175 Difference]: Start difference. First operand has 260 places, 467 transitions, 8436 flow. Second operand 8 states and 149 transitions. [2024-06-27 23:57:57,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 515 transitions, 9995 flow [2024-06-27 23:57:58,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 515 transitions, 9926 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 23:57:58,535 INFO L231 Difference]: Finished difference. Result has 265 places, 487 transitions, 9016 flow [2024-06-27 23:57:58,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8367, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9016, PETRI_PLACES=265, PETRI_TRANSITIONS=487} [2024-06-27 23:57:58,536 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 224 predicate places. [2024-06-27 23:57:58,536 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 487 transitions, 9016 flow [2024-06-27 23:57:58,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:57:58,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:57:58,537 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 23:57:58,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 23:57:58,537 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:57:58,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:57:58,537 INFO L85 PathProgramCache]: Analyzing trace with hash -794296626, now seen corresponding path program 1 times [2024-06-27 23:57:58,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:57:58,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023745622] [2024-06-27 23:57:58,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:57:58,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:57:58,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:58:00,446 INFO 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 23:58:00,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:58:00,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023745622] [2024-06-27 23:58:00,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023745622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:58:00,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:58:00,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:58:00,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467328567] [2024-06-27 23:58:00,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:58:00,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:58:00,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:58:00,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:58:00,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:58:00,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 23:58:00,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 487 transitions, 9016 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 23:58:00,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:58:00,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 23:58:00,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:58:02,005 INFO L124 PetriNetUnfolderBase]: 3352/5090 cut-off events. [2024-06-27 23:58:02,006 INFO L125 PetriNetUnfolderBase]: For 381781/381791 co-relation queries the response was YES. [2024-06-27 23:58:02,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46782 conditions, 5090 events. 3352/5090 cut-off events. For 381781/381791 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 27147 event pairs, 805 based on Foata normal form. 18/5108 useless extension candidates. Maximal degree in co-relation 46649. Up to 4167 conditions per place. [2024-06-27 23:58:02,071 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 328 selfloop transitions, 194 changer transitions 0/525 dead transitions. [2024-06-27 23:58:02,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 525 transitions, 10323 flow [2024-06-27 23:58:02,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:58:02,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:58:02,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 23:58:02,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-27 23:58:02,074 INFO L175 Difference]: Start difference. First operand has 265 places, 487 transitions, 9016 flow. Second operand 9 states and 170 transitions. [2024-06-27 23:58:02,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 525 transitions, 10323 flow [2024-06-27 23:58:02,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 525 transitions, 10247 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-27 23:58:02,854 INFO L231 Difference]: Finished difference. Result has 272 places, 488 transitions, 9385 flow [2024-06-27 23:58:02,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8940, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9385, PETRI_PLACES=272, PETRI_TRANSITIONS=488} [2024-06-27 23:58:02,855 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 231 predicate places. [2024-06-27 23:58:02,855 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 488 transitions, 9385 flow [2024-06-27 23:58:02,855 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 23:58:02,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:58:02,855 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 23:58:02,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 23:58:02,856 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 23:58:02,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:58:02,856 INFO L85 PathProgramCache]: Analyzing trace with hash 304975601, now seen corresponding path program 2 times [2024-06-27 23:58:02,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:58:02,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909897391] [2024-06-27 23:58:02,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:58:02,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:58:02,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:58:04,358 INFO 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 23:58:04,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:58:04,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909897391] [2024-06-27 23:58:04,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909897391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:58:04,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:58:04,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:58:04,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502871240] [2024-06-27 23:58:04,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:58:04,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:58:04,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:58:04,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:58:04,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:58:04,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 23:58:04,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 488 transitions, 9385 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 23:58:04,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:58:04,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 23:58:04,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:58:05,775 INFO L124 PetriNetUnfolderBase]: 3362/5089 cut-off events. [2024-06-27 23:58:05,775 INFO L125 PetriNetUnfolderBase]: For 374291/374302 co-relation queries the response was YES. [2024-06-27 23:58:05,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47538 conditions, 5089 events. 3362/5089 cut-off events. For 374291/374302 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 26981 event pairs, 805 based on Foata normal form. 12/5101 useless extension candidates. Maximal degree in co-relation 47403. Up to 4569 conditions per place. [2024-06-27 23:58:05,842 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 381 selfloop transitions, 136 changer transitions 0/520 dead transitions. [2024-06-27 23:58:05,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 520 transitions, 10817 flow [2024-06-27 23:58:05,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:58:05,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:58:05,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 23:58:05,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2024-06-27 23:58:05,844 INFO L175 Difference]: Start difference. First operand has 272 places, 488 transitions, 9385 flow. Second operand 8 states and 156 transitions. [2024-06-27 23:58:05,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 520 transitions, 10817 flow [2024-06-27 23:58:06,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 520 transitions, 10392 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 23:58:06,574 INFO L231 Difference]: Finished difference. Result has 274 places, 493 transitions, 9338 flow [2024-06-27 23:58:06,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8960, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9338, PETRI_PLACES=274, PETRI_TRANSITIONS=493} [2024-06-27 23:58:06,574 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 233 predicate places. [2024-06-27 23:58:06,574 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 493 transitions, 9338 flow [2024-06-27 23:58:06,575 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 23:58:06,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:58:06,575 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 23:58:06,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 23:58:06,575 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 23:58:06,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:58:06,575 INFO L85 PathProgramCache]: Analyzing trace with hash 336640582, now seen corresponding path program 1 times [2024-06-27 23:58:06,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:58:06,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156808327] [2024-06-27 23:58:06,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:58:06,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:58:06,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:58:08,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:58:08,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:58:08,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156808327] [2024-06-27 23:58:08,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156808327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:58:08,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:58:08,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:58:08,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554768346] [2024-06-27 23:58:08,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:58:08,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:58:08,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:58:08,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:58:08,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:58:08,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:58:08,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 493 transitions, 9338 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 23:58:08,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:58:08,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:58:08,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:58:09,969 INFO L124 PetriNetUnfolderBase]: 3442/5200 cut-off events. [2024-06-27 23:58:09,970 INFO L125 PetriNetUnfolderBase]: For 393659/393672 co-relation queries the response was YES. [2024-06-27 23:58:10,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48586 conditions, 5200 events. 3442/5200 cut-off events. For 393659/393672 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 27584 event pairs, 813 based on Foata normal form. 16/5216 useless extension candidates. Maximal degree in co-relation 48449. Up to 4537 conditions per place. [2024-06-27 23:58:10,042 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 384 selfloop transitions, 151 changer transitions 0/538 dead transitions. [2024-06-27 23:58:10,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 538 transitions, 11049 flow [2024-06-27 23:58:10,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:58:10,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:58:10,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 23:58:10,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2024-06-27 23:58:10,044 INFO L175 Difference]: Start difference. First operand has 274 places, 493 transitions, 9338 flow. Second operand 9 states and 164 transitions. [2024-06-27 23:58:10,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 538 transitions, 11049 flow [2024-06-27 23:58:10,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 538 transitions, 10825 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-27 23:58:10,795 INFO L231 Difference]: Finished difference. Result has 280 places, 509 transitions, 9822 flow [2024-06-27 23:58:10,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9114, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9822, PETRI_PLACES=280, PETRI_TRANSITIONS=509} [2024-06-27 23:58:10,796 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 239 predicate places. [2024-06-27 23:58:10,796 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 509 transitions, 9822 flow [2024-06-27 23:58:10,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 23:58:10,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:58:10,796 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 23:58:10,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 23:58:10,797 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 23:58:10,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:58:10,797 INFO L85 PathProgramCache]: Analyzing trace with hash 305244371, now seen corresponding path program 3 times [2024-06-27 23:58:10,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:58:10,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277427488] [2024-06-27 23:58:10,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:58:10,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:58:10,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:58:12,461 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 23:58:12,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:58:12,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277427488] [2024-06-27 23:58:12,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277427488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:58:12,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:58:12,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:58:12,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056348660] [2024-06-27 23:58:12,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:58:12,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:58:12,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:58:12,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:58:12,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:58:12,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 23:58:12,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 509 transitions, 9822 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 23:58:12,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:58:12,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 23:58:12,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:58:14,024 INFO L124 PetriNetUnfolderBase]: 3452/5214 cut-off events. [2024-06-27 23:58:14,024 INFO L125 PetriNetUnfolderBase]: For 409367/409380 co-relation queries the response was YES. [2024-06-27 23:58:14,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49729 conditions, 5214 events. 3452/5214 cut-off events. For 409367/409380 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 27682 event pairs, 793 based on Foata normal form. 14/5228 useless extension candidates. Maximal degree in co-relation 49590. Up to 4794 conditions per place. [2024-06-27 23:58:14,087 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 404 selfloop transitions, 127 changer transitions 0/534 dead transitions. [2024-06-27 23:58:14,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 534 transitions, 11137 flow [2024-06-27 23:58:14,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:58:14,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:58:14,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 23:58:14,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-06-27 23:58:14,089 INFO L175 Difference]: Start difference. First operand has 280 places, 509 transitions, 9822 flow. Second operand 8 states and 148 transitions. [2024-06-27 23:58:14,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 534 transitions, 11137 flow [2024-06-27 23:58:15,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 534 transitions, 11001 flow, removed 53 selfloop flow, removed 3 redundant places. [2024-06-27 23:58:15,171 INFO L231 Difference]: Finished difference. Result has 285 places, 513 transitions, 10013 flow [2024-06-27 23:58:15,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9686, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10013, PETRI_PLACES=285, PETRI_TRANSITIONS=513} [2024-06-27 23:58:15,172 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 244 predicate places. [2024-06-27 23:58:15,172 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 513 transitions, 10013 flow [2024-06-27 23:58:15,172 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 23:58:15,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:58:15,172 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 23:58:15,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 23:58:15,172 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:58:15,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:58:15,173 INFO L85 PathProgramCache]: Analyzing trace with hash -621653221, now seen corresponding path program 1 times [2024-06-27 23:58:15,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:58:15,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020797060] [2024-06-27 23:58:15,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:58:15,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:58:15,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:58:17,076 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 23:58:17,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:58:17,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020797060] [2024-06-27 23:58:17,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020797060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:58:17,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:58:17,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:58:17,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860411900] [2024-06-27 23:58:17,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:58:17,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:58:17,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:58:17,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:58:17,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:58:17,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:58:17,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 513 transitions, 10013 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 23:58:17,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:58:17,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:58:17,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:58:18,674 INFO L124 PetriNetUnfolderBase]: 3488/5263 cut-off events. [2024-06-27 23:58:18,674 INFO L125 PetriNetUnfolderBase]: For 430094/430110 co-relation queries the response was YES. [2024-06-27 23:58:18,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50836 conditions, 5263 events. 3488/5263 cut-off events. For 430094/430110 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 27898 event pairs, 822 based on Foata normal form. 18/5281 useless extension candidates. Maximal degree in co-relation 50694. Up to 4853 conditions per place. [2024-06-27 23:58:18,751 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 426 selfloop transitions, 120 changer transitions 0/549 dead transitions. [2024-06-27 23:58:18,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 549 transitions, 11875 flow [2024-06-27 23:58:18,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:58:18,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:58:18,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 23:58:18,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-27 23:58:18,753 INFO L175 Difference]: Start difference. First operand has 285 places, 513 transitions, 10013 flow. Second operand 8 states and 145 transitions. [2024-06-27 23:58:18,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 549 transitions, 11875 flow [2024-06-27 23:58:19,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 549 transitions, 11674 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 23:58:19,887 INFO L231 Difference]: Finished difference. Result has 289 places, 525 transitions, 10390 flow [2024-06-27 23:58:19,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9833, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10390, PETRI_PLACES=289, PETRI_TRANSITIONS=525} [2024-06-27 23:58:19,888 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 248 predicate places. [2024-06-27 23:58:19,888 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 525 transitions, 10390 flow [2024-06-27 23:58:19,888 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 23:58:19,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:58:19,888 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 23:58:19,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 23:58:19,889 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 23:58:19,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:58:19,889 INFO L85 PathProgramCache]: Analyzing trace with hash -30376120, now seen corresponding path program 2 times [2024-06-27 23:58:19,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:58:19,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411714794] [2024-06-27 23:58:19,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:58:19,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:58:19,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:58:21,848 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 23:58:21,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:58:21,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411714794] [2024-06-27 23:58:21,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411714794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:58:21,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:58:21,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:58:21,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154627900] [2024-06-27 23:58:21,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:58:21,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:58:21,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:58:21,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:58:21,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:58:21,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:58:21,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 525 transitions, 10390 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 23:58:21,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:58:21,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:58:21,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:58:23,463 INFO L124 PetriNetUnfolderBase]: 3529/5340 cut-off events. [2024-06-27 23:58:23,464 INFO L125 PetriNetUnfolderBase]: For 452652/452666 co-relation queries the response was YES. [2024-06-27 23:58:23,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51569 conditions, 5340 events. 3529/5340 cut-off events. For 452652/452666 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 28543 event pairs, 821 based on Foata normal form. 22/5362 useless extension candidates. Maximal degree in co-relation 51426. Up to 4499 conditions per place. [2024-06-27 23:58:23,538 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 375 selfloop transitions, 189 changer transitions 0/567 dead transitions. [2024-06-27 23:58:23,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 567 transitions, 11805 flow [2024-06-27 23:58:23,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:58:23,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:58:23,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 23:58:23,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-27 23:58:23,540 INFO L175 Difference]: Start difference. First operand has 289 places, 525 transitions, 10390 flow. Second operand 8 states and 152 transitions. [2024-06-27 23:58:23,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 567 transitions, 11805 flow [2024-06-27 23:58:24,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 567 transitions, 11598 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 23:58:24,609 INFO L231 Difference]: Finished difference. Result has 292 places, 526 transitions, 10619 flow [2024-06-27 23:58:24,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10183, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10619, PETRI_PLACES=292, PETRI_TRANSITIONS=526} [2024-06-27 23:58:24,610 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 251 predicate places. [2024-06-27 23:58:24,610 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 526 transitions, 10619 flow [2024-06-27 23:58:24,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 23:58:24,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:58:24,610 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 23:58:24,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 23:58:24,611 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 23:58:24,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:58:24,611 INFO L85 PathProgramCache]: Analyzing trace with hash -521080910, now seen corresponding path program 3 times [2024-06-27 23:58:24,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:58:24,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454847198] [2024-06-27 23:58:24,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:58:24,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:58:24,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:58:26,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:58:26,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:58:26,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454847198] [2024-06-27 23:58:26,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454847198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:58:26,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:58:26,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:58:26,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988797817] [2024-06-27 23:58:26,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:58:26,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:58:26,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:58:26,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:58:26,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:58:26,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:58:26,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 526 transitions, 10619 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 23:58:26,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:58:26,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:58:26,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:58:28,255 INFO L124 PetriNetUnfolderBase]: 3570/5414 cut-off events. [2024-06-27 23:58:28,255 INFO L125 PetriNetUnfolderBase]: For 471091/471102 co-relation queries the response was YES. [2024-06-27 23:58:28,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52521 conditions, 5414 events. 3570/5414 cut-off events. For 471091/471102 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 29198 event pairs, 863 based on Foata normal form. 20/5434 useless extension candidates. Maximal degree in co-relation 52379. Up to 4557 conditions per place. [2024-06-27 23:58:28,336 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 358 selfloop transitions, 207 changer transitions 0/568 dead transitions. [2024-06-27 23:58:28,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 568 transitions, 12028 flow [2024-06-27 23:58:28,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:58:28,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:58:28,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 23:58:28,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2024-06-27 23:58:28,338 INFO L175 Difference]: Start difference. First operand has 292 places, 526 transitions, 10619 flow. Second operand 8 states and 156 transitions. [2024-06-27 23:58:28,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 568 transitions, 12028 flow [2024-06-27 23:58:29,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 568 transitions, 11680 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 23:58:29,405 INFO L231 Difference]: Finished difference. Result has 295 places, 527 transitions, 10746 flow [2024-06-27 23:58:29,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10271, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10746, PETRI_PLACES=295, PETRI_TRANSITIONS=527} [2024-06-27 23:58:29,406 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 254 predicate places. [2024-06-27 23:58:29,406 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 527 transitions, 10746 flow [2024-06-27 23:58:29,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 23:58:29,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:58:29,407 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 23:58:29,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 23:58:29,407 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:58:29,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:58:29,408 INFO L85 PathProgramCache]: Analyzing trace with hash -348360380, now seen corresponding path program 4 times [2024-06-27 23:58:29,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:58:29,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000329746] [2024-06-27 23:58:29,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:58:29,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:58:29,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:58:31,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:58:31,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:58:31,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000329746] [2024-06-27 23:58:31,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000329746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:58:31,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:58:31,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:58:31,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469773289] [2024-06-27 23:58:31,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:58:31,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:58:31,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:58:31,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:58:31,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:58:31,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 23:58:31,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 527 transitions, 10746 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 23:58:31,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:58:31,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 23:58:31,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:58:33,050 INFO L124 PetriNetUnfolderBase]: 3611/5483 cut-off events. [2024-06-27 23:58:33,051 INFO L125 PetriNetUnfolderBase]: For 489622/489636 co-relation queries the response was YES. [2024-06-27 23:58:33,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53108 conditions, 5483 events. 3611/5483 cut-off events. For 489622/489636 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 29672 event pairs, 825 based on Foata normal form. 22/5505 useless extension candidates. Maximal degree in co-relation 52965. Up to 4336 conditions per place. [2024-06-27 23:58:33,111 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 358 selfloop transitions, 204 changer transitions 0/565 dead transitions. [2024-06-27 23:58:33,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 565 transitions, 12112 flow [2024-06-27 23:58:33,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:58:33,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:58:33,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 23:58:33,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46944444444444444 [2024-06-27 23:58:33,113 INFO L175 Difference]: Start difference. First operand has 295 places, 527 transitions, 10746 flow. Second operand 9 states and 169 transitions. [2024-06-27 23:58:33,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 565 transitions, 12112 flow [2024-06-27 23:58:33,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 565 transitions, 11758 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 23:58:33,986 INFO L231 Difference]: Finished difference. Result has 299 places, 528 transitions, 10862 flow [2024-06-27 23:58:33,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10392, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10862, PETRI_PLACES=299, PETRI_TRANSITIONS=528} [2024-06-27 23:58:33,987 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 258 predicate places. [2024-06-27 23:58:33,987 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 528 transitions, 10862 flow [2024-06-27 23:58:33,987 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 23:58:33,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:58:33,988 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 23:58:33,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 23:58:33,988 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 23:58:33,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:58:33,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1447377461, now seen corresponding path program 2 times [2024-06-27 23:58:33,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:58:33,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487878114] [2024-06-27 23:58:33,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:58:33,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:58:33,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:58:35,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:58:35,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:58:35,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487878114] [2024-06-27 23:58:35,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487878114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:58:35,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:58:35,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:58:35,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064599607] [2024-06-27 23:58:35,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:58:35,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:58:35,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:58:35,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:58:35,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:58:35,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:58:35,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 528 transitions, 10862 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 23:58:35,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:58:35,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:58:35,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:58:37,321 INFO L124 PetriNetUnfolderBase]: 3597/5459 cut-off events. [2024-06-27 23:58:37,321 INFO L125 PetriNetUnfolderBase]: For 483303/483319 co-relation queries the response was YES. [2024-06-27 23:58:37,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52881 conditions, 5459 events. 3597/5459 cut-off events. For 483303/483319 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 29514 event pairs, 864 based on Foata normal form. 18/5477 useless extension candidates. Maximal degree in co-relation 52736. Up to 5053 conditions per place. [2024-06-27 23:58:37,401 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 427 selfloop transitions, 118 changer transitions 0/548 dead transitions. [2024-06-27 23:58:37,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 548 transitions, 12276 flow [2024-06-27 23:58:37,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:58:37,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:58:37,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 23:58:37,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 23:58:37,403 INFO L175 Difference]: Start difference. First operand has 299 places, 528 transitions, 10862 flow. Second operand 8 states and 140 transitions. [2024-06-27 23:58:37,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 548 transitions, 12276 flow [2024-06-27 23:58:38,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 548 transitions, 11784 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-27 23:58:38,465 INFO L231 Difference]: Finished difference. Result has 300 places, 528 transitions, 10625 flow [2024-06-27 23:58:38,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10370, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10625, PETRI_PLACES=300, PETRI_TRANSITIONS=528} [2024-06-27 23:58:38,466 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 259 predicate places. [2024-06-27 23:58:38,466 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 528 transitions, 10625 flow [2024-06-27 23:58:38,466 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 23:58:38,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:58:38,466 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 23:58:38,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 23:58:38,466 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 23:58:38,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:58:38,467 INFO L85 PathProgramCache]: Analyzing trace with hash -823142666, now seen corresponding path program 2 times [2024-06-27 23:58:38,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:58:38,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959638322] [2024-06-27 23:58:38,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:58:38,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:58:38,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:58:40,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:58:40,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:58:40,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959638322] [2024-06-27 23:58:40,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959638322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:58:40,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:58:40,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:58:40,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458207852] [2024-06-27 23:58:40,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:58:40,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:58:40,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:58:40,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:58:40,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:58:40,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:58:40,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 528 transitions, 10625 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 23:58:40,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:58:40,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:58:40,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:58:42,082 INFO L124 PetriNetUnfolderBase]: 3711/5615 cut-off events. [2024-06-27 23:58:42,083 INFO L125 PetriNetUnfolderBase]: For 505873/505886 co-relation queries the response was YES. [2024-06-27 23:58:42,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54075 conditions, 5615 events. 3711/5615 cut-off events. For 505873/505886 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 30420 event pairs, 888 based on Foata normal form. 16/5631 useless extension candidates. Maximal degree in co-relation 53929. Up to 4863 conditions per place. [2024-06-27 23:58:42,165 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 417 selfloop transitions, 156 changer transitions 0/576 dead transitions. [2024-06-27 23:58:42,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 576 transitions, 12555 flow [2024-06-27 23:58:42,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:58:42,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:58:42,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 23:58:42,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4638888888888889 [2024-06-27 23:58:42,167 INFO L175 Difference]: Start difference. First operand has 300 places, 528 transitions, 10625 flow. Second operand 9 states and 167 transitions. [2024-06-27 23:58:42,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 576 transitions, 12555 flow [2024-06-27 23:58:43,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 576 transitions, 12357 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 23:58:43,338 INFO L231 Difference]: Finished difference. Result has 305 places, 547 transitions, 11168 flow [2024-06-27 23:58:43,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10427, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11168, PETRI_PLACES=305, PETRI_TRANSITIONS=547} [2024-06-27 23:58:43,339 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 264 predicate places. [2024-06-27 23:58:43,339 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 547 transitions, 11168 flow [2024-06-27 23:58:43,339 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 23:58:43,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:58:43,339 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 23:58:43,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 23:58:43,340 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 23:58:43,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:58:43,341 INFO L85 PathProgramCache]: Analyzing trace with hash 350944219, now seen corresponding path program 4 times [2024-06-27 23:58:43,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:58:43,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243583118] [2024-06-27 23:58:43,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:58:43,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:58:43,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:58:44,919 INFO 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 23:58:44,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:58:44,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243583118] [2024-06-27 23:58:44,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243583118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:58:44,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:58:44,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:58:44,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77379100] [2024-06-27 23:58:44,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:58:44,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:58:44,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:58:44,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:58:44,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:58:45,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 23:58:45,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 547 transitions, 11168 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 23:58:45,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:58:45,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 23:58:45,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:58:46,706 INFO L124 PetriNetUnfolderBase]: 3723/5635 cut-off events. [2024-06-27 23:58:46,706 INFO L125 PetriNetUnfolderBase]: For 520204/520220 co-relation queries the response was YES. [2024-06-27 23:58:46,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55095 conditions, 5635 events. 3723/5635 cut-off events. For 520204/520220 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 30556 event pairs, 870 based on Foata normal form. 16/5651 useless extension candidates. Maximal degree in co-relation 54946. Up to 5212 conditions per place. [2024-06-27 23:58:46,787 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 442 selfloop transitions, 123 changer transitions 0/568 dead transitions. [2024-06-27 23:58:46,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 568 transitions, 12681 flow [2024-06-27 23:58:46,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:58:46,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:58:46,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 23:58:46,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446875 [2024-06-27 23:58:46,792 INFO L175 Difference]: Start difference. First operand has 305 places, 547 transitions, 11168 flow. Second operand 8 states and 143 transitions. [2024-06-27 23:58:46,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 568 transitions, 12681 flow [2024-06-27 23:58:47,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 568 transitions, 12479 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-27 23:58:47,949 INFO L231 Difference]: Finished difference. Result has 309 places, 551 transitions, 11290 flow [2024-06-27 23:58:47,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10966, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11290, PETRI_PLACES=309, PETRI_TRANSITIONS=551} [2024-06-27 23:58:47,949 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 268 predicate places. [2024-06-27 23:58:47,950 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 551 transitions, 11290 flow [2024-06-27 23:58:47,950 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 23:58:47,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:58:47,950 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 23:58:47,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 23:58:47,950 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 23:58:47,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:58:47,951 INFO L85 PathProgramCache]: Analyzing trace with hash 319675170, now seen corresponding path program 3 times [2024-06-27 23:58:47,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:58:47,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90286862] [2024-06-27 23:58:47,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:58:47,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:58:47,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:58:49,761 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 23:58:49,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:58:49,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90286862] [2024-06-27 23:58:49,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90286862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:58:49,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:58:49,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:58:49,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860705667] [2024-06-27 23:58:49,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:58:49,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:58:49,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:58:49,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:58:49,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:58:49,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:58:49,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 551 transitions, 11290 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 23:58:49,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:58:49,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:58:49,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:58:51,520 INFO L124 PetriNetUnfolderBase]: 3771/5703 cut-off events. [2024-06-27 23:58:51,520 INFO L125 PetriNetUnfolderBase]: For 547810/547826 co-relation queries the response was YES. [2024-06-27 23:58:51,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55764 conditions, 5703 events. 3771/5703 cut-off events. For 547810/547826 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 30932 event pairs, 866 based on Foata normal form. 22/5725 useless extension candidates. Maximal degree in co-relation 55614. Up to 4922 conditions per place. [2024-06-27 23:58:51,601 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 424 selfloop transitions, 157 changer transitions 0/584 dead transitions. [2024-06-27 23:58:51,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 584 transitions, 13111 flow [2024-06-27 23:58:51,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:58:51,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:58:51,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 23:58:51,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 23:58:51,603 INFO L175 Difference]: Start difference. First operand has 309 places, 551 transitions, 11290 flow. Second operand 9 states and 160 transitions. [2024-06-27 23:58:51,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 584 transitions, 13111 flow [2024-06-27 23:58:52,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 584 transitions, 12892 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 23:58:52,925 INFO L231 Difference]: Finished difference. Result has 313 places, 559 transitions, 11572 flow [2024-06-27 23:58:52,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11071, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11572, PETRI_PLACES=313, PETRI_TRANSITIONS=559} [2024-06-27 23:58:52,926 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 272 predicate places. [2024-06-27 23:58:52,926 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 559 transitions, 11572 flow [2024-06-27 23:58:52,926 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 23:58:52,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:58:52,926 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 23:58:52,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 23:58:52,927 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 23:58:52,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:58:52,927 INFO L85 PathProgramCache]: Analyzing trace with hash 319664010, now seen corresponding path program 4 times [2024-06-27 23:58:52,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:58:52,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564730378] [2024-06-27 23:58:52,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:58:52,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:58:52,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:58:54,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:58:54,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:58:54,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564730378] [2024-06-27 23:58:54,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564730378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:58:54,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:58:54,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:58:54,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173941578] [2024-06-27 23:58:54,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:58:54,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:58:54,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:58:54,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:58:54,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:58:54,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:58:54,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 559 transitions, 11572 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 23:58:54,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:58:54,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:58:54,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:58:56,306 INFO L124 PetriNetUnfolderBase]: 3751/5677 cut-off events. [2024-06-27 23:58:56,307 INFO L125 PetriNetUnfolderBase]: For 548611/548627 co-relation queries the response was YES. [2024-06-27 23:58:56,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55477 conditions, 5677 events. 3751/5677 cut-off events. For 548611/548627 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 30779 event pairs, 866 based on Foata normal form. 22/5699 useless extension candidates. Maximal degree in co-relation 55326. Up to 4911 conditions per place. [2024-06-27 23:58:56,392 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 425 selfloop transitions, 156 changer transitions 0/584 dead transitions. [2024-06-27 23:58:56,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 584 transitions, 13100 flow [2024-06-27 23:58:56,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:58:56,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:58:56,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 23:58:56,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-27 23:58:56,393 INFO L175 Difference]: Start difference. First operand has 313 places, 559 transitions, 11572 flow. Second operand 9 states and 161 transitions. [2024-06-27 23:58:56,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 584 transitions, 13100 flow [2024-06-27 23:58:57,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 584 transitions, 12644 flow, removed 101 selfloop flow, removed 6 redundant places. [2024-06-27 23:58:57,860 INFO L231 Difference]: Finished difference. Result has 316 places, 559 transitions, 11440 flow [2024-06-27 23:58:57,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11116, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11440, PETRI_PLACES=316, PETRI_TRANSITIONS=559} [2024-06-27 23:58:57,861 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 275 predicate places. [2024-06-27 23:58:57,861 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 559 transitions, 11440 flow [2024-06-27 23:58:57,862 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 23:58:57,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:58:57,862 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 23:58:57,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 23:58:57,862 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 23:58:57,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:58:57,863 INFO L85 PathProgramCache]: Analyzing trace with hash -750110981, now seen corresponding path program 3 times [2024-06-27 23:58:57,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:58:57,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009558434] [2024-06-27 23:58:57,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:58:57,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:58:57,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:58:59,098 INFO 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 23:58:59,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:58:59,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009558434] [2024-06-27 23:58:59,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009558434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:58:59,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:58:59,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:58:59,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855827290] [2024-06-27 23:58:59,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:58:59,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:58:59,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:58:59,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:58:59,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:58:59,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:58:59,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 559 transitions, 11440 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 23:58:59,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:58:59,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:58:59,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:59:00,695 INFO L124 PetriNetUnfolderBase]: 3779/5730 cut-off events. [2024-06-27 23:59:00,696 INFO L125 PetriNetUnfolderBase]: For 557688/557692 co-relation queries the response was YES. [2024-06-27 23:59:00,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55679 conditions, 5730 events. 3779/5730 cut-off events. For 557688/557692 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 31328 event pairs, 1323 based on Foata normal form. 8/5738 useless extension candidates. Maximal degree in co-relation 55527. Up to 5405 conditions per place. [2024-06-27 23:59:00,768 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 485 selfloop transitions, 101 changer transitions 0/589 dead transitions. [2024-06-27 23:59:00,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 589 transitions, 13330 flow [2024-06-27 23:59:00,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:59:00,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:59:00,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 23:59:00,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-27 23:59:00,770 INFO L175 Difference]: Start difference. First operand has 316 places, 559 transitions, 11440 flow. Second operand 7 states and 124 transitions. [2024-06-27 23:59:00,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 589 transitions, 13330 flow [2024-06-27 23:59:02,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 589 transitions, 13057 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 23:59:02,133 INFO L231 Difference]: Finished difference. Result has 318 places, 572 transitions, 11798 flow [2024-06-27 23:59:02,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11175, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11798, PETRI_PLACES=318, PETRI_TRANSITIONS=572} [2024-06-27 23:59:02,134 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 277 predicate places. [2024-06-27 23:59:02,134 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 572 transitions, 11798 flow [2024-06-27 23:59:02,134 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 23:59:02,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:59:02,135 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 23:59:02,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 23:59:02,136 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 23:59:02,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:59:02,137 INFO L85 PathProgramCache]: Analyzing trace with hash -744397061, now seen corresponding path program 4 times [2024-06-27 23:59:02,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:59:02,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497522941] [2024-06-27 23:59:02,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:59:02,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:59:02,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:59:03,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:59:03,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:59:03,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497522941] [2024-06-27 23:59:03,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497522941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:59:03,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:59:03,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:59:03,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024680731] [2024-06-27 23:59:03,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:59:03,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:59:03,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:59:03,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:59:03,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:59:03,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:59:03,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 572 transitions, 11798 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 23:59:03,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:59:03,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:59:03,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:59:05,018 INFO L124 PetriNetUnfolderBase]: 3773/5721 cut-off events. [2024-06-27 23:59:05,018 INFO L125 PetriNetUnfolderBase]: For 558487/558491 co-relation queries the response was YES. [2024-06-27 23:59:05,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55435 conditions, 5721 events. 3773/5721 cut-off events. For 558487/558491 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 31281 event pairs, 1320 based on Foata normal form. 6/5727 useless extension candidates. Maximal degree in co-relation 55281. Up to 5400 conditions per place. [2024-06-27 23:59:05,095 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 488 selfloop transitions, 95 changer transitions 0/586 dead transitions. [2024-06-27 23:59:05,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 586 transitions, 13286 flow [2024-06-27 23:59:05,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:59:05,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:59:05,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 23:59:05,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43214285714285716 [2024-06-27 23:59:05,096 INFO L175 Difference]: Start difference. First operand has 318 places, 572 transitions, 11798 flow. Second operand 7 states and 121 transitions. [2024-06-27 23:59:05,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 586 transitions, 13286 flow [2024-06-27 23:59:06,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 586 transitions, 13133 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-27 23:59:06,602 INFO L231 Difference]: Finished difference. Result has 322 places, 572 transitions, 11852 flow [2024-06-27 23:59:06,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11645, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11852, PETRI_PLACES=322, PETRI_TRANSITIONS=572} [2024-06-27 23:59:06,602 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 281 predicate places. [2024-06-27 23:59:06,603 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 572 transitions, 11852 flow [2024-06-27 23:59:06,603 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 23:59:06,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:59:06,603 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 23:59:06,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 23:59:06,603 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 23:59:06,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:59:06,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1861988834, now seen corresponding path program 5 times [2024-06-27 23:59:06,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:59:06,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25043889] [2024-06-27 23:59:06,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:59:06,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:59:06,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:59:08,248 INFO 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 23:59:08,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:59:08,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25043889] [2024-06-27 23:59:08,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25043889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:59:08,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:59:08,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:59:08,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092633842] [2024-06-27 23:59:08,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:59:08,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:59:08,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:59:08,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:59:08,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:59:08,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:59:08,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 572 transitions, 11852 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 23:59:08,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:59:08,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:59:08,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:59:10,165 INFO L124 PetriNetUnfolderBase]: 3861/5843 cut-off events. [2024-06-27 23:59:10,165 INFO L125 PetriNetUnfolderBase]: For 597574/597578 co-relation queries the response was YES. [2024-06-27 23:59:10,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57203 conditions, 5843 events. 3861/5843 cut-off events. For 597574/597578 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 31960 event pairs, 1317 based on Foata normal form. 8/5851 useless extension candidates. Maximal degree in co-relation 57048. Up to 5214 conditions per place. [2024-06-27 23:59:10,257 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 470 selfloop transitions, 130 changer transitions 0/603 dead transitions. [2024-06-27 23:59:10,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 603 transitions, 13783 flow [2024-06-27 23:59:10,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:59:10,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:59:10,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 23:59:10,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41388888888888886 [2024-06-27 23:59:10,259 INFO L175 Difference]: Start difference. First operand has 322 places, 572 transitions, 11852 flow. Second operand 9 states and 149 transitions. [2024-06-27 23:59:10,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 603 transitions, 13783 flow [2024-06-27 23:59:12,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 603 transitions, 13678 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-27 23:59:12,041 INFO L231 Difference]: Finished difference. Result has 329 places, 583 transitions, 12286 flow [2024-06-27 23:59:12,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11747, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12286, PETRI_PLACES=329, PETRI_TRANSITIONS=583} [2024-06-27 23:59:12,042 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 288 predicate places. [2024-06-27 23:59:12,042 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 583 transitions, 12286 flow [2024-06-27 23:59:12,042 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 23:59:12,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:59:12,043 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 23:59:12,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 23:59:12,043 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 23:59:12,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:59:12,043 INFO L85 PathProgramCache]: Analyzing trace with hash -744400688, now seen corresponding path program 6 times [2024-06-27 23:59:12,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:59:12,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813224169] [2024-06-27 23:59:12,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:59:12,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:59:12,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:59:13,847 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 23:59:13,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:59:13,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813224169] [2024-06-27 23:59:13,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813224169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:59:13,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:59:13,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:59:13,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351690217] [2024-06-27 23:59:13,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:59:13,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:59:13,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:59:13,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:59:13,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:59:13,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:59:13,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 583 transitions, 12286 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 23:59:13,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:59:13,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:59:13,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:59:15,596 INFO L124 PetriNetUnfolderBase]: 3853/5833 cut-off events. [2024-06-27 23:59:15,597 INFO L125 PetriNetUnfolderBase]: For 606925/606929 co-relation queries the response was YES. [2024-06-27 23:59:15,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57564 conditions, 5833 events. 3853/5833 cut-off events. For 606925/606929 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 31922 event pairs, 1315 based on Foata normal form. 8/5841 useless extension candidates. Maximal degree in co-relation 57407. Up to 5211 conditions per place. [2024-06-27 23:59:15,686 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 469 selfloop transitions, 131 changer transitions 0/603 dead transitions. [2024-06-27 23:59:15,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 603 transitions, 13869 flow [2024-06-27 23:59:15,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:59:15,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:59:15,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 23:59:15,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-27 23:59:15,687 INFO L175 Difference]: Start difference. First operand has 329 places, 583 transitions, 12286 flow. Second operand 8 states and 142 transitions. [2024-06-27 23:59:15,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 603 transitions, 13869 flow [2024-06-27 23:59:17,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 603 transitions, 13628 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 23:59:17,531 INFO L231 Difference]: Finished difference. Result has 331 places, 584 transitions, 12348 flow [2024-06-27 23:59:17,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12045, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12348, PETRI_PLACES=331, PETRI_TRANSITIONS=584} [2024-06-27 23:59:17,532 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 290 predicate places. [2024-06-27 23:59:17,532 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 584 transitions, 12348 flow [2024-06-27 23:59:17,532 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 23:59:17,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:59:17,533 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 23:59:17,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 23:59:17,533 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 23:59:17,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:59:17,533 INFO L85 PathProgramCache]: Analyzing trace with hash -206327819, now seen corresponding path program 5 times [2024-06-27 23:59:17,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:59:17,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997046250] [2024-06-27 23:59:17,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:59:17,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:59:17,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:59:18,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:59:18,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:59:18,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997046250] [2024-06-27 23:59:18,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997046250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:59:18,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:59:18,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:59:18,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751993218] [2024-06-27 23:59:18,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:59:18,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:59:18,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:59:18,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:59:18,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:59:18,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:59:18,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 584 transitions, 12348 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 23:59:18,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:59:18,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:59:18,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:59:20,205 INFO L124 PetriNetUnfolderBase]: 3833/5798 cut-off events. [2024-06-27 23:59:20,206 INFO L125 PetriNetUnfolderBase]: For 611445/611445 co-relation queries the response was YES. [2024-06-27 23:59:20,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57223 conditions, 5798 events. 3833/5798 cut-off events. For 611445/611445 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 31638 event pairs, 1364 based on Foata normal form. 2/5800 useless extension candidates. Maximal degree in co-relation 57067. Up to 5686 conditions per place. [2024-06-27 23:59:20,303 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 561 selfloop transitions, 35 changer transitions 0/599 dead transitions. [2024-06-27 23:59:20,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 599 transitions, 13756 flow [2024-06-27 23:59:20,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:59:20,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:59:20,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-27 23:59:20,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41785714285714287 [2024-06-27 23:59:20,305 INFO L175 Difference]: Start difference. First operand has 331 places, 584 transitions, 12348 flow. Second operand 7 states and 117 transitions. [2024-06-27 23:59:20,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 599 transitions, 13756 flow [2024-06-27 23:59:22,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 599 transitions, 13505 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-27 23:59:22,371 INFO L231 Difference]: Finished difference. Result has 333 places, 584 transitions, 12178 flow [2024-06-27 23:59:22,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12097, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12178, PETRI_PLACES=333, PETRI_TRANSITIONS=584} [2024-06-27 23:59:22,373 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 292 predicate places. [2024-06-27 23:59:22,373 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 584 transitions, 12178 flow [2024-06-27 23:59:22,373 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 23:59:22,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:59:22,374 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 23:59:22,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 23:59:22,374 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 23:59:22,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:59:22,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1231162251, now seen corresponding path program 6 times [2024-06-27 23:59:22,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:59:22,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259884017] [2024-06-27 23:59:22,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:59:22,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:59:22,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:59:23,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:59:23,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:59:23,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259884017] [2024-06-27 23:59:23,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259884017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:59:23,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:59:23,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:59:23,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219661438] [2024-06-27 23:59:23,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:59:23,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:59:23,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:59:23,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:59:23,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:59:23,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:59:23,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 584 transitions, 12178 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 23:59:23,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:59:23,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:59:23,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:59:25,238 INFO L124 PetriNetUnfolderBase]: 3838/5804 cut-off events. [2024-06-27 23:59:25,239 INFO L125 PetriNetUnfolderBase]: For 620680/620680 co-relation queries the response was YES. [2024-06-27 23:59:25,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57026 conditions, 5804 events. 3838/5804 cut-off events. For 620680/620680 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 31660 event pairs, 1371 based on Foata normal form. 1/5805 useless extension candidates. Maximal degree in co-relation 56869. Up to 5720 conditions per place. [2024-06-27 23:59:25,310 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 572 selfloop transitions, 24 changer transitions 0/599 dead transitions. [2024-06-27 23:59:25,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 599 transitions, 13515 flow [2024-06-27 23:59:25,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:59:25,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:59:25,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-27 23:59:25,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 23:59:25,312 INFO L175 Difference]: Start difference. First operand has 333 places, 584 transitions, 12178 flow. Second operand 7 states and 112 transitions. [2024-06-27 23:59:25,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 599 transitions, 13515 flow [2024-06-27 23:59:26,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 599 transitions, 13182 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-27 23:59:26,883 INFO L231 Difference]: Finished difference. Result has 332 places, 588 transitions, 12012 flow [2024-06-27 23:59:26,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11867, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12012, PETRI_PLACES=332, PETRI_TRANSITIONS=588} [2024-06-27 23:59:26,884 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 291 predicate places. [2024-06-27 23:59:26,884 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 588 transitions, 12012 flow [2024-06-27 23:59:26,884 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 23:59:26,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:59:26,884 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 23:59:26,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 23:59:26,885 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:59:26,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:59:26,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1055216088, now seen corresponding path program 5 times [2024-06-27 23:59:26,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:59:26,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680301361] [2024-06-27 23:59:26,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:59:26,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:59:26,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:59:28,831 INFO 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 23:59:28,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:59:28,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680301361] [2024-06-27 23:59:28,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680301361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:59:28,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:59:28,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:59:28,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163604136] [2024-06-27 23:59:28,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:59:28,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:59:28,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:59:28,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:59:28,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:59:28,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:59:28,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 588 transitions, 12012 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 23:59:28,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:59:28,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:59:28,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:59:30,865 INFO L124 PetriNetUnfolderBase]: 3961/6025 cut-off events. [2024-06-27 23:59:30,865 INFO L125 PetriNetUnfolderBase]: For 651050/651052 co-relation queries the response was YES. [2024-06-27 23:59:30,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57952 conditions, 6025 events. 3961/6025 cut-off events. For 651050/651052 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 33451 event pairs, 1311 based on Foata normal form. 14/6039 useless extension candidates. Maximal degree in co-relation 57797. Up to 5161 conditions per place. [2024-06-27 23:59:30,953 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 447 selfloop transitions, 169 changer transitions 0/619 dead transitions. [2024-06-27 23:59:30,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 619 transitions, 13440 flow [2024-06-27 23:59:30,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:59:30,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:59:30,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 23:59:30,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-27 23:59:30,955 INFO L175 Difference]: Start difference. First operand has 332 places, 588 transitions, 12012 flow. Second operand 9 states and 152 transitions. [2024-06-27 23:59:30,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 619 transitions, 13440 flow [2024-06-27 23:59:32,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 619 transitions, 13368 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 23:59:32,733 INFO L231 Difference]: Finished difference. Result has 337 places, 591 transitions, 12363 flow [2024-06-27 23:59:32,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11940, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12363, PETRI_PLACES=337, PETRI_TRANSITIONS=591} [2024-06-27 23:59:32,734 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 296 predicate places. [2024-06-27 23:59:32,734 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 591 transitions, 12363 flow [2024-06-27 23:59:32,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 23:59:32,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:59:32,734 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 23:59:32,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 23:59:32,735 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:59:32,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:59:32,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1602184192, now seen corresponding path program 6 times [2024-06-27 23:59:32,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:59:32,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994033649] [2024-06-27 23:59:32,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:59:32,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:59:32,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:59:34,529 INFO 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 23:59:34,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:59:34,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994033649] [2024-06-27 23:59:34,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994033649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:59:34,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:59:34,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:59:34,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043456119] [2024-06-27 23:59:34,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:59:34,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:59:34,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:59:34,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:59:34,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:59:34,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:59:34,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 591 transitions, 12363 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 23:59:34,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:59:34,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:59:34,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:59:36,508 INFO L124 PetriNetUnfolderBase]: 4043/6158 cut-off events. [2024-06-27 23:59:36,508 INFO L125 PetriNetUnfolderBase]: For 674858/674860 co-relation queries the response was YES. [2024-06-27 23:59:36,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59304 conditions, 6158 events. 4043/6158 cut-off events. For 674858/674860 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 34438 event pairs, 1343 based on Foata normal form. 12/6170 useless extension candidates. Maximal degree in co-relation 59148. Up to 5057 conditions per place. [2024-06-27 23:59:36,619 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 445 selfloop transitions, 173 changer transitions 0/621 dead transitions. [2024-06-27 23:59:36,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 621 transitions, 13787 flow [2024-06-27 23:59:36,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:59:36,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:59:36,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 23:59:36,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-27 23:59:36,621 INFO L175 Difference]: Start difference. First operand has 337 places, 591 transitions, 12363 flow. Second operand 8 states and 142 transitions. [2024-06-27 23:59:36,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 621 transitions, 13787 flow [2024-06-27 23:59:38,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 621 transitions, 13412 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-27 23:59:38,396 INFO L231 Difference]: Finished difference. Result has 338 places, 593 transitions, 12410 flow [2024-06-27 23:59:38,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11988, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12410, PETRI_PLACES=338, PETRI_TRANSITIONS=593} [2024-06-27 23:59:38,397 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 297 predicate places. [2024-06-27 23:59:38,397 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 593 transitions, 12410 flow [2024-06-27 23:59:38,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 23:59:38,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:59:38,398 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 23:59:38,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 23:59:38,398 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:59:38,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:59:38,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1248865280, now seen corresponding path program 7 times [2024-06-27 23:59:38,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:59:38,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570011793] [2024-06-27 23:59:38,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:59:38,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:59:38,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:59:40,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:59:40,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:59:40,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570011793] [2024-06-27 23:59:40,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570011793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:59:40,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:59:40,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:59:40,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762046886] [2024-06-27 23:59:40,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:59:40,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:59:40,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:59:40,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:59:40,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:59:40,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:59:40,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 593 transitions, 12410 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 23:59:40,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:59:40,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:59:40,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:59:42,093 INFO L124 PetriNetUnfolderBase]: 4084/6230 cut-off events. [2024-06-27 23:59:42,093 INFO L125 PetriNetUnfolderBase]: For 689758/689760 co-relation queries the response was YES. [2024-06-27 23:59:42,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59975 conditions, 6230 events. 4084/6230 cut-off events. For 689758/689760 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 35027 event pairs, 1425 based on Foata normal form. 12/6242 useless extension candidates. Maximal degree in co-relation 59818. Up to 6006 conditions per place. [2024-06-27 23:59:42,202 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 597 selfloop transitions, 22 changer transitions 0/622 dead transitions. [2024-06-27 23:59:42,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 622 transitions, 13830 flow [2024-06-27 23:59:42,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:59:42,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:59:42,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-27 23:59:42,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 23:59:42,204 INFO L175 Difference]: Start difference. First operand has 338 places, 593 transitions, 12410 flow. Second operand 9 states and 144 transitions. [2024-06-27 23:59:42,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 622 transitions, 13830 flow [2024-06-27 23:59:44,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 622 transitions, 13440 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 23:59:44,100 INFO L231 Difference]: Finished difference. Result has 341 places, 594 transitions, 12130 flow [2024-06-27 23:59:44,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12020, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12130, PETRI_PLACES=341, PETRI_TRANSITIONS=594} [2024-06-27 23:59:44,101 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 300 predicate places. [2024-06-27 23:59:44,101 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 594 transitions, 12130 flow [2024-06-27 23:59:44,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 23:59:44,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:59:44,101 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 23:59:44,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 23:59:44,101 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:59:44,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:59:44,102 INFO L85 PathProgramCache]: Analyzing trace with hash 963534770, now seen corresponding path program 8 times [2024-06-27 23:59:44,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:59:44,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998017793] [2024-06-27 23:59:44,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:59:44,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:59:44,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:59:46,015 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 23:59:46,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:59:46,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998017793] [2024-06-27 23:59:46,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998017793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:59:46,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:59:46,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 23:59:46,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714814451] [2024-06-27 23:59:46,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:59:46,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 23:59:46,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:59:46,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 23:59:46,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 23:59:46,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:59:46,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 594 transitions, 12130 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:46,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:59:46,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:59:46,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:59:48,016 INFO L124 PetriNetUnfolderBase]: 4064/6208 cut-off events. [2024-06-27 23:59:48,016 INFO L125 PetriNetUnfolderBase]: For 675745/675747 co-relation queries the response was YES. [2024-06-27 23:59:48,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58365 conditions, 6208 events. 4064/6208 cut-off events. For 675745/675747 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 35009 event pairs, 1394 based on Foata normal form. 12/6220 useless extension candidates. Maximal degree in co-relation 58207. Up to 5741 conditions per place. [2024-06-27 23:59:48,126 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 513 selfloop transitions, 106 changer transitions 0/622 dead transitions. [2024-06-27 23:59:48,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 622 transitions, 13426 flow [2024-06-27 23:59:48,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:59:48,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:59:48,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 23:59:48,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-27 23:59:48,128 INFO L175 Difference]: Start difference. First operand has 341 places, 594 transitions, 12130 flow. Second operand 9 states and 152 transitions. [2024-06-27 23:59:48,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 622 transitions, 13426 flow [2024-06-27 23:59:50,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 622 transitions, 13330 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-27 23:59:50,540 INFO L231 Difference]: Finished difference. Result has 342 places, 593 transitions, 12164 flow [2024-06-27 23:59:50,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11948, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12164, PETRI_PLACES=342, PETRI_TRANSITIONS=593} [2024-06-27 23:59:50,541 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 301 predicate places. [2024-06-27 23:59:50,541 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 593 transitions, 12164 flow [2024-06-27 23:59:50,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:50,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:59:50,542 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 23:59:50,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 23:59:50,542 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 23:59:50,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:59:50,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1019397263, now seen corresponding path program 7 times [2024-06-27 23:59:50,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:59:50,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184029928] [2024-06-27 23:59:50,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:59:50,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:59:50,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:59:51,671 INFO 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 23:59:51,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:59:51,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184029928] [2024-06-27 23:59:51,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184029928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:59:51,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:59:51,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:59:51,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773550363] [2024-06-27 23:59:51,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:59:51,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:59:51,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:59:51,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:59:51,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:59:51,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:59:51,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 593 transitions, 12164 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 23:59:51,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:59:51,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:59:51,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:59:53,326 INFO L124 PetriNetUnfolderBase]: 4061/6193 cut-off events. [2024-06-27 23:59:53,326 INFO L125 PetriNetUnfolderBase]: For 663256/663260 co-relation queries the response was YES. [2024-06-27 23:59:53,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58449 conditions, 6193 events. 4061/6193 cut-off events. For 663256/663260 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 34790 event pairs, 1443 based on Foata normal form. 5/6198 useless extension candidates. Maximal degree in co-relation 58290. Up to 6110 conditions per place. [2024-06-27 23:59:53,430 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 575 selfloop transitions, 24 changer transitions 0/602 dead transitions. [2024-06-27 23:59:53,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 602 transitions, 13394 flow [2024-06-27 23:59:53,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:59:53,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:59:53,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-27 23:59:53,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-27 23:59:53,432 INFO L175 Difference]: Start difference. First operand has 342 places, 593 transitions, 12164 flow. Second operand 7 states and 108 transitions. [2024-06-27 23:59:53,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 602 transitions, 13394 flow [2024-06-27 23:59:55,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 602 transitions, 13061 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-27 23:59:55,152 INFO L231 Difference]: Finished difference. Result has 342 places, 593 transitions, 11885 flow [2024-06-27 23:59:55,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11831, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11885, PETRI_PLACES=342, PETRI_TRANSITIONS=593} [2024-06-27 23:59:55,153 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 301 predicate places. [2024-06-27 23:59:55,153 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 593 transitions, 11885 flow [2024-06-27 23:59:55,154 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 23:59:55,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:59:55,154 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 23:59:55,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 23:59:55,154 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:59:55,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:59:55,154 INFO L85 PathProgramCache]: Analyzing trace with hash -40766347, now seen corresponding path program 8 times [2024-06-27 23:59:55,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:59:55,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126692784] [2024-06-27 23:59:55,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:59:55,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:59:55,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:59:56,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:59:56,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:59:56,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126692784] [2024-06-27 23:59:56,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126692784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:59:56,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:59:56,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:59:56,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322610360] [2024-06-27 23:59:56,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:59:56,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:59:56,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:59:56,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:59:56,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:59:56,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 23:59:56,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 593 transitions, 11885 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 23:59:56,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:59:56,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 23:59:56,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:59:58,089 INFO L124 PetriNetUnfolderBase]: 4053/6182 cut-off events. [2024-06-27 23:59:58,089 INFO L125 PetriNetUnfolderBase]: For 667688/667692 co-relation queries the response was YES. [2024-06-27 23:59:58,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57304 conditions, 6182 events. 4053/6182 cut-off events. For 667688/667692 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 34655 event pairs, 1441 based on Foata normal form. 6/6188 useless extension candidates. Maximal degree in co-relation 57145. Up to 6077 conditions per place. [2024-06-27 23:59:58,195 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 565 selfloop transitions, 34 changer transitions 0/602 dead transitions. [2024-06-27 23:59:58,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 602 transitions, 13115 flow [2024-06-27 23:59:58,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:59:58,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:59:58,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-27 23:59:58,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3964285714285714 [2024-06-27 23:59:58,197 INFO L175 Difference]: Start difference. First operand has 342 places, 593 transitions, 11885 flow. Second operand 7 states and 111 transitions. [2024-06-27 23:59:58,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 602 transitions, 13115 flow [2024-06-27 23:59:59,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 602 transitions, 13023 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 23:59:59,733 INFO L231 Difference]: Finished difference. Result has 343 places, 593 transitions, 11869 flow [2024-06-27 23:59:59,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11793, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11869, PETRI_PLACES=343, PETRI_TRANSITIONS=593} [2024-06-27 23:59:59,734 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 302 predicate places. [2024-06-27 23:59:59,734 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 593 transitions, 11869 flow [2024-06-27 23:59:59,735 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 23:59:59,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:59:59,735 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 23:59:59,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 23:59:59,735 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:59:59,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:59:59,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1025115151, now seen corresponding path program 5 times [2024-06-27 23:59:59,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:59:59,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962751977] [2024-06-27 23:59:59,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:59:59,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:59:59,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:00:01,797 INFO 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 00:00:01,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:00:01,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962751977] [2024-06-28 00:00:01,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962751977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:00:01,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:00:01,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:00:01,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723334727] [2024-06-28 00:00:01,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:00:01,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:00:01,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:00:01,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:00:01,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:00:01,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:00:01,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 593 transitions, 11869 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) [2024-06-28 00:00:01,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:00:01,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:00:01,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:00:03,746 INFO L124 PetriNetUnfolderBase]: 4099/6247 cut-off events. [2024-06-28 00:00:03,746 INFO L125 PetriNetUnfolderBase]: For 701468/701472 co-relation queries the response was YES. [2024-06-28 00:00:03,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57991 conditions, 6247 events. 4099/6247 cut-off events. For 701468/701472 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 35102 event pairs, 1434 based on Foata normal form. 12/6259 useless extension candidates. Maximal degree in co-relation 57832. Up to 6089 conditions per place. [2024-06-28 00:00:03,859 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 560 selfloop transitions, 57 changer transitions 0/620 dead transitions. [2024-06-28 00:00:03,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 620 transitions, 13573 flow [2024-06-28 00:00:03,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:00:03,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:00:03,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-28 00:00:03,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409375 [2024-06-28 00:00:03,861 INFO L175 Difference]: Start difference. First operand has 343 places, 593 transitions, 11869 flow. Second operand 8 states and 131 transitions. [2024-06-28 00:00:03,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 620 transitions, 13573 flow [2024-06-28 00:00:06,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 620 transitions, 13437 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-28 00:00:06,339 INFO L231 Difference]: Finished difference. Result has 346 places, 607 transitions, 12187 flow [2024-06-28 00:00:06,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11735, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12187, PETRI_PLACES=346, PETRI_TRANSITIONS=607} [2024-06-28 00:00:06,340 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 305 predicate places. [2024-06-28 00:00:06,340 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 607 transitions, 12187 flow [2024-06-28 00:00:06,341 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) [2024-06-28 00:00:06,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:00:06,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:00:06,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 00:00:06,341 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:00:06,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:00:06,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1025114810, now seen corresponding path program 7 times [2024-06-28 00:00:06,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:00:06,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522330636] [2024-06-28 00:00:06,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:00:06,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:00:06,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:00:08,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:00:08,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:00:08,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522330636] [2024-06-28 00:00:08,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522330636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:00:08,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:00:08,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:00:08,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428801034] [2024-06-28 00:00:08,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:00:08,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:00:08,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:00:08,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:00:08,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:00:08,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:00:08,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 607 transitions, 12187 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) [2024-06-28 00:00:08,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:00:08,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:00:08,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:00:11,231 INFO L124 PetriNetUnfolderBase]: 4119/6275 cut-off events. [2024-06-28 00:00:11,231 INFO L125 PetriNetUnfolderBase]: For 716281/716285 co-relation queries the response was YES. [2024-06-28 00:00:11,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59681 conditions, 6275 events. 4119/6275 cut-off events. For 716281/716285 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 35214 event pairs, 1435 based on Foata normal form. 8/6283 useless extension candidates. Maximal degree in co-relation 59519. Up to 6041 conditions per place. [2024-06-28 00:00:11,348 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 564 selfloop transitions, 59 changer transitions 0/626 dead transitions. [2024-06-28 00:00:11,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 626 transitions, 13918 flow [2024-06-28 00:00:11,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:00:11,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:00:11,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-28 00:00:11,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-28 00:00:11,350 INFO L175 Difference]: Start difference. First operand has 346 places, 607 transitions, 12187 flow. Second operand 8 states and 132 transitions. [2024-06-28 00:00:11,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 626 transitions, 13918 flow [2024-06-28 00:00:14,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 626 transitions, 13722 flow, removed 70 selfloop flow, removed 4 redundant places. [2024-06-28 00:00:14,486 INFO L231 Difference]: Finished difference. Result has 350 places, 611 transitions, 12209 flow [2024-06-28 00:00:14,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11995, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12209, PETRI_PLACES=350, PETRI_TRANSITIONS=611} [2024-06-28 00:00:14,490 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 309 predicate places. [2024-06-28 00:00:14,490 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 611 transitions, 12209 flow [2024-06-28 00:00:14,490 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) [2024-06-28 00:00:14,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:00:14,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:00:14,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-28 00:00:14,491 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:00:14,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:00:14,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1025103650, now seen corresponding path program 8 times [2024-06-28 00:00:14,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:00:14,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821853609] [2024-06-28 00:00:14,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:00:14,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:00:14,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:00:16,946 INFO 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 00:00:16,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:00:16,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821853609] [2024-06-28 00:00:16,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821853609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:00:16,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:00:16,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:00:16,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195316173] [2024-06-28 00:00:16,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:00:16,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:00:16,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:00:16,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:00:16,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:00:17,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:00:17,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 611 transitions, 12209 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) [2024-06-28 00:00:17,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:00:17,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:00:17,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:00:19,717 INFO L124 PetriNetUnfolderBase]: 4143/6309 cut-off events. [2024-06-28 00:00:19,718 INFO L125 PetriNetUnfolderBase]: For 715952/715956 co-relation queries the response was YES. [2024-06-28 00:00:19,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59852 conditions, 6309 events. 4143/6309 cut-off events. For 715952/715956 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 35385 event pairs, 1438 based on Foata normal form. 8/6317 useless extension candidates. Maximal degree in co-relation 59689. Up to 6068 conditions per place. [2024-06-28 00:00:19,861 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 571 selfloop transitions, 59 changer transitions 0/633 dead transitions. [2024-06-28 00:00:19,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 633 transitions, 14058 flow [2024-06-28 00:00:19,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:00:19,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:00:19,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-28 00:00:19,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-28 00:00:19,864 INFO L175 Difference]: Start difference. First operand has 350 places, 611 transitions, 12209 flow. Second operand 9 states and 140 transitions. [2024-06-28 00:00:19,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 633 transitions, 14058 flow [2024-06-28 00:00:23,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 633 transitions, 13797 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-28 00:00:23,316 INFO L231 Difference]: Finished difference. Result has 354 places, 619 transitions, 12296 flow [2024-06-28 00:00:23,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11982, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12296, PETRI_PLACES=354, PETRI_TRANSITIONS=619} [2024-06-28 00:00:23,334 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 313 predicate places. [2024-06-28 00:00:23,334 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 619 transitions, 12296 flow [2024-06-28 00:00:23,334 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) [2024-06-28 00:00:23,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:00:23,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:00:23,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-28 00:00:23,335 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:00:23,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:00:23,335 INFO L85 PathProgramCache]: Analyzing trace with hash 746955382, now seen corresponding path program 1 times [2024-06-28 00:00:23,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:00:23,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525630080] [2024-06-28 00:00:23,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:00:23,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:00:23,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:00:26,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:00:26,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:00:26,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525630080] [2024-06-28 00:00:26,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525630080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:00:26,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:00:26,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:00:26,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758631178] [2024-06-28 00:00:26,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:00:26,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:00:26,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:00:26,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:00:26,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:00:26,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:00:26,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 619 transitions, 12296 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 00:00:26,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:00:26,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:00:26,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:00:29,627 INFO L124 PetriNetUnfolderBase]: 4146/6314 cut-off events. [2024-06-28 00:00:29,627 INFO L125 PetriNetUnfolderBase]: For 715428/715428 co-relation queries the response was YES. [2024-06-28 00:00:29,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59503 conditions, 6314 events. 4146/6314 cut-off events. For 715428/715428 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 35470 event pairs, 1446 based on Foata normal form. 4/6318 useless extension candidates. Maximal degree in co-relation 59339. Up to 6191 conditions per place. [2024-06-28 00:00:29,777 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 611 selfloop transitions, 32 changer transitions 0/646 dead transitions. [2024-06-28 00:00:29,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 646 transitions, 13817 flow [2024-06-28 00:00:29,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:00:29,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:00:29,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-28 00:00:29,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3861111111111111 [2024-06-28 00:00:29,780 INFO L175 Difference]: Start difference. First operand has 354 places, 619 transitions, 12296 flow. Second operand 9 states and 139 transitions. [2024-06-28 00:00:29,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 646 transitions, 13817 flow [2024-06-28 00:00:32,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 646 transitions, 13651 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-28 00:00:32,252 INFO L231 Difference]: Finished difference. Result has 358 places, 627 transitions, 12378 flow [2024-06-28 00:00:32,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12149, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12378, PETRI_PLACES=358, PETRI_TRANSITIONS=627} [2024-06-28 00:00:32,253 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 317 predicate places. [2024-06-28 00:00:32,254 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 627 transitions, 12378 flow [2024-06-28 00:00:32,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 00:00:32,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:00:32,254 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 00:00:32,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-28 00:00:32,254 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)] === [2024-06-28 00:00:32,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:00:32,255 INFO L85 PathProgramCache]: Analyzing trace with hash 333905417, now seen corresponding path program 1 times [2024-06-28 00:00:32,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:00:32,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855351802] [2024-06-28 00:00:32,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:00:32,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:00:32,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:00:33,734 INFO 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 00:00:33,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:00:33,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855351802] [2024-06-28 00:00:33,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855351802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:00:33,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:00:33,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:00:33,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266123174] [2024-06-28 00:00:33,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:00:33,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:00:33,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:00:33,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:00:33,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:00:33,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-28 00:00:33,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 627 transitions, 12378 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) [2024-06-28 00:00:33,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:00:33,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-28 00:00:33,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:00:35,567 INFO L124 PetriNetUnfolderBase]: 3715/5893 cut-off events. [2024-06-28 00:00:35,567 INFO L125 PetriNetUnfolderBase]: For 740566/740584 co-relation queries the response was YES. [2024-06-28 00:00:35,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57447 conditions, 5893 events. 3715/5893 cut-off events. For 740566/740584 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 35180 event pairs, 485 based on Foata normal form. 17/5886 useless extension candidates. Maximal degree in co-relation 57282. Up to 4412 conditions per place. [2024-06-28 00:00:35,664 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 414 selfloop transitions, 170 changer transitions 0/672 dead transitions. [2024-06-28 00:00:35,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 672 transitions, 14222 flow [2024-06-28 00:00:35,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:00:35,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:00:35,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-28 00:00:35,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51875 [2024-06-28 00:00:35,666 INFO L175 Difference]: Start difference. First operand has 358 places, 627 transitions, 12378 flow. Second operand 8 states and 166 transitions. [2024-06-28 00:00:35,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 672 transitions, 14222 flow [2024-06-28 00:00:37,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 672 transitions, 14170 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-28 00:00:37,882 INFO L231 Difference]: Finished difference. Result has 363 places, 639 transitions, 13003 flow [2024-06-28 00:00:37,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12326, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13003, PETRI_PLACES=363, PETRI_TRANSITIONS=639} [2024-06-28 00:00:37,883 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 322 predicate places. [2024-06-28 00:00:37,883 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 639 transitions, 13003 flow [2024-06-28 00:00:37,883 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) [2024-06-28 00:00:37,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:00:37,883 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 00:00:37,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-28 00:00:37,883 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)] === [2024-06-28 00:00:37,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:00:37,884 INFO L85 PathProgramCache]: Analyzing trace with hash 3261687, now seen corresponding path program 1 times [2024-06-28 00:00:37,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:00:37,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772027947] [2024-06-28 00:00:37,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:00:37,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:00:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:00:39,912 INFO 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 00:00:39,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:00:39,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772027947] [2024-06-28 00:00:39,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772027947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:00:39,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:00:39,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:00:39,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437751009] [2024-06-28 00:00:39,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:00:39,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:00:39,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:00:39,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:00:39,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:00:40,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:00:40,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 639 transitions, 13003 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 00:00:40,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:00:40,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:00:40,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:00:42,415 INFO L124 PetriNetUnfolderBase]: 4248/6460 cut-off events. [2024-06-28 00:00:42,416 INFO L125 PetriNetUnfolderBase]: For 771731/771744 co-relation queries the response was YES. [2024-06-28 00:00:42,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62329 conditions, 6460 events. 4248/6460 cut-off events. For 771731/771744 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 36421 event pairs, 938 based on Foata normal form. 16/6476 useless extension candidates. Maximal degree in co-relation 62161. Up to 5244 conditions per place. [2024-06-28 00:00:42,544 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 409 selfloop transitions, 280 changer transitions 0/692 dead transitions. [2024-06-28 00:00:42,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 692 transitions, 15433 flow [2024-06-28 00:00:42,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:00:42,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:00:42,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-28 00:00:42,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675 [2024-06-28 00:00:42,546 INFO L175 Difference]: Start difference. First operand has 363 places, 639 transitions, 13003 flow. Second operand 10 states and 187 transitions. [2024-06-28 00:00:42,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 692 transitions, 15433 flow [2024-06-28 00:00:44,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 692 transitions, 15317 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-28 00:00:44,822 INFO L231 Difference]: Finished difference. Result has 370 places, 655 transitions, 13994 flow [2024-06-28 00:00:44,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12901, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13994, PETRI_PLACES=370, PETRI_TRANSITIONS=655} [2024-06-28 00:00:44,823 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 329 predicate places. [2024-06-28 00:00:44,823 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 655 transitions, 13994 flow [2024-06-28 00:00:44,823 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 00:00:44,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:00:44,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:00:44,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-28 00:00:44,824 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)] === [2024-06-28 00:00:44,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:00:44,825 INFO L85 PathProgramCache]: Analyzing trace with hash 864070695, now seen corresponding path program 2 times [2024-06-28 00:00:44,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:00:44,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546592472] [2024-06-28 00:00:44,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:00:44,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:00:44,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:00:47,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:00:47,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:00:47,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546592472] [2024-06-28 00:00:47,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546592472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:00:47,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:00:47,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:00:47,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248144629] [2024-06-28 00:00:47,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:00:47,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:00:47,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:00:47,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:00:47,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:00:47,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 00:00:47,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 655 transitions, 13994 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) [2024-06-28 00:00:47,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:00:47,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 00:00:47,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:00:49,495 INFO L124 PetriNetUnfolderBase]: 4430/6730 cut-off events. [2024-06-28 00:00:49,495 INFO L125 PetriNetUnfolderBase]: For 872278/872289 co-relation queries the response was YES. [2024-06-28 00:00:49,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68121 conditions, 6730 events. 4430/6730 cut-off events. For 872278/872289 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 37833 event pairs, 819 based on Foata normal form. 14/6744 useless extension candidates. Maximal degree in co-relation 67952. Up to 5284 conditions per place. [2024-06-28 00:00:49,621 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 430 selfloop transitions, 277 changer transitions 0/710 dead transitions. [2024-06-28 00:00:49,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 710 transitions, 16552 flow [2024-06-28 00:00:49,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:00:49,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:00:49,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-28 00:00:49,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-06-28 00:00:49,623 INFO L175 Difference]: Start difference. First operand has 370 places, 655 transitions, 13994 flow. Second operand 9 states and 186 transitions. [2024-06-28 00:00:49,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 710 transitions, 16552 flow [2024-06-28 00:00:52,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 710 transitions, 16313 flow, removed 83 selfloop flow, removed 4 redundant places. [2024-06-28 00:00:52,308 INFO L231 Difference]: Finished difference. Result has 377 places, 668 transitions, 14676 flow [2024-06-28 00:00:52,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13785, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14676, PETRI_PLACES=377, PETRI_TRANSITIONS=668} [2024-06-28 00:00:52,309 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 336 predicate places. [2024-06-28 00:00:52,309 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 668 transitions, 14676 flow [2024-06-28 00:00:52,309 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) [2024-06-28 00:00:52,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:00:52,310 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 00:00:52,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-28 00:00:52,310 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)] === [2024-06-28 00:00:52,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:00:52,310 INFO L85 PathProgramCache]: Analyzing trace with hash 864309705, now seen corresponding path program 3 times [2024-06-28 00:00:52,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:00:52,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682026383] [2024-06-28 00:00:52,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:00:52,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:00:52,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:00:54,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:00:54,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:00:54,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682026383] [2024-06-28 00:00:54,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682026383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:00:54,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:00:54,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:00:54,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020705946] [2024-06-28 00:00:54,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:00:54,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:00:54,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:00:54,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:00:54,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:00:54,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 00:00:54,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 668 transitions, 14676 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) [2024-06-28 00:00:54,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:00:54,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 00:00:54,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:00:57,228 INFO L124 PetriNetUnfolderBase]: 4446/6754 cut-off events. [2024-06-28 00:00:57,228 INFO L125 PetriNetUnfolderBase]: For 896936/896947 co-relation queries the response was YES. [2024-06-28 00:00:57,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69719 conditions, 6754 events. 4446/6754 cut-off events. For 896936/896947 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 38277 event pairs, 967 based on Foata normal form. 14/6768 useless extension candidates. Maximal degree in co-relation 69546. Up to 5589 conditions per place. [2024-06-28 00:00:57,415 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 435 selfloop transitions, 266 changer transitions 0/704 dead transitions. [2024-06-28 00:00:57,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 704 transitions, 16808 flow [2024-06-28 00:00:57,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:00:57,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:00:57,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-28 00:00:57,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49166666666666664 [2024-06-28 00:00:57,416 INFO L175 Difference]: Start difference. First operand has 377 places, 668 transitions, 14676 flow. Second operand 9 states and 177 transitions. [2024-06-28 00:00:57,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 704 transitions, 16808 flow [2024-06-28 00:01:01,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 704 transitions, 16252 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-28 00:01:01,083 INFO L231 Difference]: Finished difference. Result has 381 places, 671 transitions, 14736 flow [2024-06-28 00:01:01,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14129, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14736, PETRI_PLACES=381, PETRI_TRANSITIONS=671} [2024-06-28 00:01:01,084 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 340 predicate places. [2024-06-28 00:01:01,084 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 671 transitions, 14736 flow [2024-06-28 00:01:01,084 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) [2024-06-28 00:01:01,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:01:01,084 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 00:01:01,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-28 00:01:01,085 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)] === [2024-06-28 00:01:01,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:01:01,085 INFO L85 PathProgramCache]: Analyzing trace with hash 864310015, now seen corresponding path program 2 times [2024-06-28 00:01:01,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:01:01,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123425103] [2024-06-28 00:01:01,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:01:01,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:01:01,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:01:03,867 INFO 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 00:01:03,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:01:03,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123425103] [2024-06-28 00:01:03,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123425103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:01:03,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:01:03,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:01:03,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994750302] [2024-06-28 00:01:03,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:01:03,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:01:03,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:01:03,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:01:03,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:01:04,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 00:01:04,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 671 transitions, 14736 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) [2024-06-28 00:01:04,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:01:04,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 00:01:04,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:01:06,489 INFO L124 PetriNetUnfolderBase]: 4466/6782 cut-off events. [2024-06-28 00:01:06,489 INFO L125 PetriNetUnfolderBase]: For 915321/915332 co-relation queries the response was YES. [2024-06-28 00:01:06,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70011 conditions, 6782 events. 4466/6782 cut-off events. For 915321/915332 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 38513 event pairs, 956 based on Foata normal form. 14/6796 useless extension candidates. Maximal degree in co-relation 69837. Up to 5544 conditions per place. [2024-06-28 00:01:06,623 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 417 selfloop transitions, 288 changer transitions 0/708 dead transitions. [2024-06-28 00:01:06,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 708 transitions, 16890 flow [2024-06-28 00:01:06,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:01:06,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:01:06,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-28 00:01:06,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49722222222222223 [2024-06-28 00:01:06,625 INFO L175 Difference]: Start difference. First operand has 381 places, 671 transitions, 14736 flow. Second operand 9 states and 179 transitions. [2024-06-28 00:01:06,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 708 transitions, 16890 flow [2024-06-28 00:01:09,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 708 transitions, 16308 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-28 00:01:09,707 INFO L231 Difference]: Finished difference. Result has 383 places, 675 transitions, 14810 flow [2024-06-28 00:01:09,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14154, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14810, PETRI_PLACES=383, PETRI_TRANSITIONS=675} [2024-06-28 00:01:09,708 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 342 predicate places. [2024-06-28 00:01:09,708 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 675 transitions, 14810 flow [2024-06-28 00:01:09,709 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) [2024-06-28 00:01:09,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:01:09,709 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 00:01:09,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-28 00:01:09,709 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)] === [2024-06-28 00:01:09,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:01:09,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1845924085, now seen corresponding path program 3 times [2024-06-28 00:01:09,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:01:09,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331402212] [2024-06-28 00:01:09,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:01:09,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:01:09,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:01:12,752 INFO 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 00:01:12,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:01:12,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331402212] [2024-06-28 00:01:12,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331402212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:01:12,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:01:12,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:01:12,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652265872] [2024-06-28 00:01:12,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:01:12,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:01:12,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:01:12,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:01:12,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:01:12,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 00:01:12,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 675 transitions, 14810 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) [2024-06-28 00:01:12,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:01:12,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 00:01:12,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:01:15,464 INFO L124 PetriNetUnfolderBase]: 4486/6810 cut-off events. [2024-06-28 00:01:15,464 INFO L125 PetriNetUnfolderBase]: For 931543/931554 co-relation queries the response was YES. [2024-06-28 00:01:15,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70479 conditions, 6810 events. 4486/6810 cut-off events. For 931543/931554 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 38643 event pairs, 962 based on Foata normal form. 14/6824 useless extension candidates. Maximal degree in co-relation 70304. Up to 5889 conditions per place. [2024-06-28 00:01:15,615 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 463 selfloop transitions, 240 changer transitions 0/706 dead transitions. [2024-06-28 00:01:15,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 706 transitions, 16776 flow [2024-06-28 00:01:15,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:01:15,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:01:15,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-28 00:01:15,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46944444444444444 [2024-06-28 00:01:15,616 INFO L175 Difference]: Start difference. First operand has 383 places, 675 transitions, 14810 flow. Second operand 9 states and 169 transitions. [2024-06-28 00:01:15,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 706 transitions, 16776 flow [2024-06-28 00:01:19,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 706 transitions, 16352 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-28 00:01:19,117 INFO L231 Difference]: Finished difference. Result has 386 places, 679 transitions, 14970 flow [2024-06-28 00:01:19,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14394, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14970, PETRI_PLACES=386, PETRI_TRANSITIONS=679} [2024-06-28 00:01:19,119 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 345 predicate places. [2024-06-28 00:01:19,119 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 679 transitions, 14970 flow [2024-06-28 00:01:19,119 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) [2024-06-28 00:01:19,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:01:19,119 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 00:01:19,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-28 00:01:19,119 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)] === [2024-06-28 00:01:19,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:01:19,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1814632995, now seen corresponding path program 4 times [2024-06-28 00:01:19,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:01:19,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147918245] [2024-06-28 00:01:19,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:01:19,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:01:19,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:01:21,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:01:21,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:01:21,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147918245] [2024-06-28 00:01:21,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147918245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:01:21,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:01:21,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:01:21,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718122515] [2024-06-28 00:01:21,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:01:21,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:01:21,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:01:21,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:01:21,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:01:21,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 00:01:21,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 679 transitions, 14970 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) [2024-06-28 00:01:21,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:01:21,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 00:01:21,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:01:24,058 INFO L124 PetriNetUnfolderBase]: 4502/6834 cut-off events. [2024-06-28 00:01:24,059 INFO L125 PetriNetUnfolderBase]: For 935526/935537 co-relation queries the response was YES. [2024-06-28 00:01:24,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70725 conditions, 6834 events. 4502/6834 cut-off events. For 935526/935537 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 38777 event pairs, 993 based on Foata normal form. 14/6848 useless extension candidates. Maximal degree in co-relation 70550. Up to 6381 conditions per place. [2024-06-28 00:01:24,237 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 539 selfloop transitions, 162 changer transitions 0/704 dead transitions. [2024-06-28 00:01:24,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 704 transitions, 16523 flow [2024-06-28 00:01:24,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:01:24,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:01:24,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-28 00:01:24,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-28 00:01:24,238 INFO L175 Difference]: Start difference. First operand has 386 places, 679 transitions, 14970 flow. Second operand 9 states and 160 transitions. [2024-06-28 00:01:24,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 704 transitions, 16523 flow [2024-06-28 00:01:27,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 704 transitions, 16032 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-28 00:01:27,719 INFO L231 Difference]: Finished difference. Result has 389 places, 682 transitions, 14880 flow [2024-06-28 00:01:27,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14479, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14880, PETRI_PLACES=389, PETRI_TRANSITIONS=682} [2024-06-28 00:01:27,720 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 348 predicate places. [2024-06-28 00:01:27,721 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 682 transitions, 14880 flow [2024-06-28 00:01:27,721 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) [2024-06-28 00:01:27,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:01:27,721 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 00:01:27,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-28 00:01:27,721 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)] === [2024-06-28 00:01:27,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:01:27,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1814633305, now seen corresponding path program 4 times [2024-06-28 00:01:27,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:01:27,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055190657] [2024-06-28 00:01:27,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:01:27,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:01:27,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:01:30,732 INFO 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 00:01:30,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:01:30,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055190657] [2024-06-28 00:01:30,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055190657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:01:30,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:01:30,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:01:30,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635132808] [2024-06-28 00:01:30,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:01:30,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:01:30,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:01:30,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:01:30,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:01:30,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 00:01:30,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 682 transitions, 14880 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) [2024-06-28 00:01:30,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:01:30,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 00:01:30,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:01:33,246 INFO L124 PetriNetUnfolderBase]: 4522/6862 cut-off events. [2024-06-28 00:01:33,246 INFO L125 PetriNetUnfolderBase]: For 952900/952911 co-relation queries the response was YES. [2024-06-28 00:01:33,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70705 conditions, 6862 events. 4522/6862 cut-off events. For 952900/952911 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 38978 event pairs, 962 based on Foata normal form. 14/6876 useless extension candidates. Maximal degree in co-relation 70529. Up to 5905 conditions per place. [2024-06-28 00:01:33,370 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 469 selfloop transitions, 242 changer transitions 0/714 dead transitions. [2024-06-28 00:01:33,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 714 transitions, 16868 flow [2024-06-28 00:01:33,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:01:33,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:01:33,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-28 00:01:33,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2024-06-28 00:01:33,373 INFO L175 Difference]: Start difference. First operand has 389 places, 682 transitions, 14880 flow. Second operand 9 states and 172 transitions. [2024-06-28 00:01:33,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 714 transitions, 16868 flow [2024-06-28 00:01:36,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 714 transitions, 16567 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-28 00:01:36,285 INFO L231 Difference]: Finished difference. Result has 392 places, 686 transitions, 15150 flow [2024-06-28 00:01:36,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14579, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15150, PETRI_PLACES=392, PETRI_TRANSITIONS=686} [2024-06-28 00:01:36,286 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 351 predicate places. [2024-06-28 00:01:36,286 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 686 transitions, 15150 flow [2024-06-28 00:01:36,287 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) [2024-06-28 00:01:36,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:01:36,287 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 00:01:36,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-28 00:01:36,287 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)] === [2024-06-28 00:01:36,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:01:36,287 INFO L85 PathProgramCache]: Analyzing trace with hash -2122780397, now seen corresponding path program 1 times [2024-06-28 00:01:36,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:01:36,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834893341] [2024-06-28 00:01:36,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:01:36,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:01:36,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:01:38,760 INFO 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 00:01:38,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:01:38,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834893341] [2024-06-28 00:01:38,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834893341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:01:38,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:01:38,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:01:38,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245675686] [2024-06-28 00:01:38,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:01:38,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:01:38,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:01:38,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:01:38,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:01:38,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:01:38,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 686 transitions, 15150 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) [2024-06-28 00:01:38,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:01:38,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:01:38,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:01:41,396 INFO L124 PetriNetUnfolderBase]: 4532/6877 cut-off events. [2024-06-28 00:01:41,397 INFO L125 PetriNetUnfolderBase]: For 969658/969670 co-relation queries the response was YES. [2024-06-28 00:01:41,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71490 conditions, 6877 events. 4532/6877 cut-off events. For 969658/969670 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 39013 event pairs, 997 based on Foata normal form. 12/6889 useless extension candidates. Maximal degree in co-relation 71313. Up to 6422 conditions per place. [2024-06-28 00:01:41,531 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 599 selfloop transitions, 113 changer transitions 0/715 dead transitions. [2024-06-28 00:01:41,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 715 transitions, 16760 flow [2024-06-28 00:01:41,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:01:41,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:01:41,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-28 00:01:41,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-06-28 00:01:41,533 INFO L175 Difference]: Start difference. First operand has 392 places, 686 transitions, 15150 flow. Second operand 8 states and 148 transitions. [2024-06-28 00:01:41,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 715 transitions, 16760 flow [2024-06-28 00:01:44,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 715 transitions, 16229 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-28 00:01:44,514 INFO L231 Difference]: Finished difference. Result has 393 places, 690 transitions, 14941 flow [2024-06-28 00:01:44,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14619, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14941, PETRI_PLACES=393, PETRI_TRANSITIONS=690} [2024-06-28 00:01:44,515 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 352 predicate places. [2024-06-28 00:01:44,515 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 690 transitions, 14941 flow [2024-06-28 00:01:44,516 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) [2024-06-28 00:01:44,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:01:44,516 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 00:01:44,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-28 00:01:44,516 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)] === [2024-06-28 00:01:44,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:01:44,516 INFO L85 PathProgramCache]: Analyzing trace with hash 2005668663, now seen corresponding path program 1 times [2024-06-28 00:01:44,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:01:44,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390560796] [2024-06-28 00:01:44,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:01:44,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:01:44,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:01:46,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:01:46,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:01:46,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390560796] [2024-06-28 00:01:46,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390560796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:01:46,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:01:46,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:01:46,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790454712] [2024-06-28 00:01:46,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:01:46,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:01:46,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:01:46,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:01:46,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:01:46,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:01:46,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 690 transitions, 14941 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) [2024-06-28 00:01:46,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:01:46,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:01:46,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:01:49,134 INFO L124 PetriNetUnfolderBase]: 4604/6976 cut-off events. [2024-06-28 00:01:49,134 INFO L125 PetriNetUnfolderBase]: For 1031456/1031470 co-relation queries the response was YES. [2024-06-28 00:01:49,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72801 conditions, 6976 events. 4604/6976 cut-off events. For 1031456/1031470 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 39581 event pairs, 1015 based on Foata normal form. 20/6996 useless extension candidates. Maximal degree in co-relation 72624. Up to 6063 conditions per place. [2024-06-28 00:01:49,244 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 520 selfloop transitions, 208 changer transitions 0/731 dead transitions. [2024-06-28 00:01:49,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 731 transitions, 17398 flow [2024-06-28 00:01:49,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:01:49,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:01:49,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-28 00:01:49,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-28 00:01:49,246 INFO L175 Difference]: Start difference. First operand has 393 places, 690 transitions, 14941 flow. Second operand 9 states and 165 transitions. [2024-06-28 00:01:49,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 731 transitions, 17398 flow [2024-06-28 00:01:52,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 731 transitions, 17173 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-28 00:01:52,410 INFO L231 Difference]: Finished difference. Result has 398 places, 702 transitions, 15467 flow [2024-06-28 00:01:52,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14716, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15467, PETRI_PLACES=398, PETRI_TRANSITIONS=702} [2024-06-28 00:01:52,411 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 357 predicate places. [2024-06-28 00:01:52,412 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 702 transitions, 15467 flow [2024-06-28 00:01:52,412 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) [2024-06-28 00:01:52,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:01:52,412 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 00:01:52,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-28 00:01:52,412 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)] === [2024-06-28 00:01:52,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:01:52,413 INFO L85 PathProgramCache]: Analyzing trace with hash 2089091495, now seen corresponding path program 2 times [2024-06-28 00:01:52,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:01:52,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152708324] [2024-06-28 00:01:52,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:01:52,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:01:52,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:01:54,446 INFO 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 00:01:54,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:01:54,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152708324] [2024-06-28 00:01:54,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152708324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:01:54,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:01:54,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:01:54,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875784410] [2024-06-28 00:01:54,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:01:54,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:01:54,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:01:54,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:01:54,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:01:54,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:01:54,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 702 transitions, 15467 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) [2024-06-28 00:01:54,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:01:54,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:01:54,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:01:57,024 INFO L124 PetriNetUnfolderBase]: 4646/7034 cut-off events. [2024-06-28 00:01:57,024 INFO L125 PetriNetUnfolderBase]: For 1050724/1050736 co-relation queries the response was YES. [2024-06-28 00:01:57,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74326 conditions, 7034 events. 4646/7034 cut-off events. For 1050724/1050736 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 39969 event pairs, 1024 based on Foata normal form. 12/7046 useless extension candidates. Maximal degree in co-relation 74147. Up to 6255 conditions per place. [2024-06-28 00:01:57,162 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 588 selfloop transitions, 158 changer transitions 0/749 dead transitions. [2024-06-28 00:01:57,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 749 transitions, 18015 flow [2024-06-28 00:01:57,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:01:57,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:01:57,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-28 00:01:57,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48125 [2024-06-28 00:01:57,164 INFO L175 Difference]: Start difference. First operand has 398 places, 702 transitions, 15467 flow. Second operand 8 states and 154 transitions. [2024-06-28 00:01:57,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 749 transitions, 18015 flow [2024-06-28 00:02:00,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 749 transitions, 17532 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-28 00:02:00,595 INFO L231 Difference]: Finished difference. Result has 402 places, 722 transitions, 15737 flow [2024-06-28 00:02:00,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14984, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15737, PETRI_PLACES=402, PETRI_TRANSITIONS=722} [2024-06-28 00:02:00,596 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 361 predicate places. [2024-06-28 00:02:00,596 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 722 transitions, 15737 flow [2024-06-28 00:02:00,597 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) [2024-06-28 00:02:00,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:00,597 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 00:02:00,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-28 00:02:00,597 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)] === [2024-06-28 00:02:00,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:00,597 INFO L85 PathProgramCache]: Analyzing trace with hash 199153691, now seen corresponding path program 2 times [2024-06-28 00:02:00,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:00,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149714317] [2024-06-28 00:02:00,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:00,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:00,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:02,584 INFO 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 00:02:02,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:02,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149714317] [2024-06-28 00:02:02,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149714317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:02,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:02,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:02:02,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531102947] [2024-06-28 00:02:02,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:02,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:02:02,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:02,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:02:02,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:02:02,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:02:02,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 722 transitions, 15737 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) [2024-06-28 00:02:02,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:02,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:02:02,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:05,005 INFO L124 PetriNetUnfolderBase]: 4686/7091 cut-off events. [2024-06-28 00:02:05,005 INFO L125 PetriNetUnfolderBase]: For 1095547/1095561 co-relation queries the response was YES. [2024-06-28 00:02:05,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75282 conditions, 7091 events. 4686/7091 cut-off events. For 1095547/1095561 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 40227 event pairs, 977 based on Foata normal form. 20/7111 useless extension candidates. Maximal degree in co-relation 75101. Up to 6153 conditions per place. [2024-06-28 00:02:05,139 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 540 selfloop transitions, 211 changer transitions 0/754 dead transitions. [2024-06-28 00:02:05,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 754 transitions, 17922 flow [2024-06-28 00:02:05,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:02:05,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:02:05,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-28 00:02:05,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-28 00:02:05,141 INFO L175 Difference]: Start difference. First operand has 402 places, 722 transitions, 15737 flow. Second operand 8 states and 150 transitions. [2024-06-28 00:02:05,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 754 transitions, 17922 flow [2024-06-28 00:02:09,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 754 transitions, 17808 flow, removed 49 selfloop flow, removed 1 redundant places. [2024-06-28 00:02:09,035 INFO L231 Difference]: Finished difference. Result has 409 places, 730 transitions, 16277 flow [2024-06-28 00:02:09,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15623, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16277, PETRI_PLACES=409, PETRI_TRANSITIONS=730} [2024-06-28 00:02:09,035 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 368 predicate places. [2024-06-28 00:02:09,036 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 730 transitions, 16277 flow [2024-06-28 00:02:09,036 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) [2024-06-28 00:02:09,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:09,036 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 00:02:09,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-28 00:02:09,036 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)] === [2024-06-28 00:02:09,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:09,037 INFO L85 PathProgramCache]: Analyzing trace with hash -2112167113, now seen corresponding path program 3 times [2024-06-28 00:02:09,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:09,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248204613] [2024-06-28 00:02:09,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:09,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:09,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:11,469 INFO 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 00:02:11,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:11,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248204613] [2024-06-28 00:02:11,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248204613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:11,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:11,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:02:11,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276545390] [2024-06-28 00:02:11,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:11,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:02:11,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:11,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:02:11,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:02:11,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:02:11,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 730 transitions, 16277 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) [2024-06-28 00:02:11,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:11,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:02:11,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:14,739 INFO L124 PetriNetUnfolderBase]: 4658/7053 cut-off events. [2024-06-28 00:02:14,740 INFO L125 PetriNetUnfolderBase]: For 1087645/1087659 co-relation queries the response was YES. [2024-06-28 00:02:14,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75206 conditions, 7053 events. 4658/7053 cut-off events. For 1087645/1087659 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 39997 event pairs, 972 based on Foata normal form. 20/7073 useless extension candidates. Maximal degree in co-relation 75022. Up to 6132 conditions per place. [2024-06-28 00:02:14,920 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 540 selfloop transitions, 212 changer transitions 0/755 dead transitions. [2024-06-28 00:02:14,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 755 transitions, 18271 flow [2024-06-28 00:02:14,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:02:14,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:02:14,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-28 00:02:14,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-28 00:02:14,922 INFO L175 Difference]: Start difference. First operand has 409 places, 730 transitions, 16277 flow. Second operand 9 states and 160 transitions. [2024-06-28 00:02:14,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 755 transitions, 18271 flow [2024-06-28 00:02:20,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 755 transitions, 17796 flow, removed 64 selfloop flow, removed 6 redundant places. [2024-06-28 00:02:20,180 INFO L231 Difference]: Finished difference. Result has 412 places, 730 transitions, 16238 flow [2024-06-28 00:02:20,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15802, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16238, PETRI_PLACES=412, PETRI_TRANSITIONS=730} [2024-06-28 00:02:20,181 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 371 predicate places. [2024-06-28 00:02:20,181 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 730 transitions, 16238 flow [2024-06-28 00:02:20,181 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) [2024-06-28 00:02:20,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:20,182 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 00:02:20,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-28 00:02:20,182 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)] === [2024-06-28 00:02:20,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:20,184 INFO L85 PathProgramCache]: Analyzing trace with hash 167866445, now seen corresponding path program 3 times [2024-06-28 00:02:20,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:20,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484119241] [2024-06-28 00:02:20,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:20,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:20,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:22,532 INFO 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 00:02:22,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:22,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484119241] [2024-06-28 00:02:22,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484119241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:22,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:22,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:02:22,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154580781] [2024-06-28 00:02:22,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:22,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:02:22,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:22,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:02:22,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:02:22,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:02:22,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 730 transitions, 16238 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) [2024-06-28 00:02:22,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:22,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:02:22,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:24,935 INFO L124 PetriNetUnfolderBase]: 4652/7046 cut-off events. [2024-06-28 00:02:24,935 INFO L125 PetriNetUnfolderBase]: For 1071370/1071382 co-relation queries the response was YES. [2024-06-28 00:02:25,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74987 conditions, 7046 events. 4652/7046 cut-off events. For 1071370/1071382 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 39987 event pairs, 1031 based on Foata normal form. 12/7058 useless extension candidates. Maximal degree in co-relation 74801. Up to 6268 conditions per place. [2024-06-28 00:02:25,071 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 583 selfloop transitions, 167 changer transitions 0/753 dead transitions. [2024-06-28 00:02:25,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 753 transitions, 18260 flow [2024-06-28 00:02:25,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:02:25,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:02:25,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-28 00:02:25,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-06-28 00:02:25,072 INFO L175 Difference]: Start difference. First operand has 412 places, 730 transitions, 16238 flow. Second operand 8 states and 148 transitions. [2024-06-28 00:02:25,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 753 transitions, 18260 flow [2024-06-28 00:02:28,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 753 transitions, 17869 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-28 00:02:28,873 INFO L231 Difference]: Finished difference. Result has 414 places, 730 transitions, 16189 flow [2024-06-28 00:02:28,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15847, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16189, PETRI_PLACES=414, PETRI_TRANSITIONS=730} [2024-06-28 00:02:28,873 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 373 predicate places. [2024-06-28 00:02:28,874 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 730 transitions, 16189 flow [2024-06-28 00:02:28,874 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) [2024-06-28 00:02:28,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:28,874 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 00:02:28,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-28 00:02:28,874 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)] === [2024-06-28 00:02:28,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:28,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1319996313, now seen corresponding path program 5 times [2024-06-28 00:02:28,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:28,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212354460] [2024-06-28 00:02:28,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:28,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:28,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:31,030 INFO 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 00:02:31,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:31,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212354460] [2024-06-28 00:02:31,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212354460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:31,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:31,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:02:31,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382943224] [2024-06-28 00:02:31,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:31,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:02:31,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:31,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:02:31,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:02:31,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 00:02:31,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 730 transitions, 16189 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) [2024-06-28 00:02:31,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:31,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 00:02:31,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:33,816 INFO L124 PetriNetUnfolderBase]: 4676/7079 cut-off events. [2024-06-28 00:02:33,816 INFO L125 PetriNetUnfolderBase]: For 1100964/1100978 co-relation queries the response was YES. [2024-06-28 00:02:33,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75171 conditions, 7079 events. 4676/7079 cut-off events. For 1100964/1100978 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 40166 event pairs, 964 based on Foata normal form. 16/7095 useless extension candidates. Maximal degree in co-relation 74985. Up to 6121 conditions per place. [2024-06-28 00:02:33,932 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 530 selfloop transitions, 223 changer transitions 0/756 dead transitions. [2024-06-28 00:02:33,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 756 transitions, 18267 flow [2024-06-28 00:02:33,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:02:33,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:02:33,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-28 00:02:33,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527777777777778 [2024-06-28 00:02:33,933 INFO L175 Difference]: Start difference. First operand has 414 places, 730 transitions, 16189 flow. Second operand 9 states and 163 transitions. [2024-06-28 00:02:33,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 756 transitions, 18267 flow [2024-06-28 00:02:37,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 756 transitions, 17933 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-28 00:02:37,566 INFO L231 Difference]: Finished difference. Result has 417 places, 734 transitions, 16402 flow [2024-06-28 00:02:37,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15855, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16402, PETRI_PLACES=417, PETRI_TRANSITIONS=734} [2024-06-28 00:02:37,567 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 376 predicate places. [2024-06-28 00:02:37,567 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 734 transitions, 16402 flow [2024-06-28 00:02:37,567 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) [2024-06-28 00:02:37,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:37,567 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 00:02:37,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-28 00:02:37,568 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)] === [2024-06-28 00:02:37,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:37,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1320009209, now seen corresponding path program 1 times [2024-06-28 00:02:37,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:37,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769468384] [2024-06-28 00:02:37,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:37,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:37,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:40,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:40,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:40,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769468384] [2024-06-28 00:02:40,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769468384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:40,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:40,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:02:40,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82148572] [2024-06-28 00:02:40,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:40,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:02:40,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:40,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:02:40,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:02:40,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:02:40,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 734 transitions, 16402 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) [2024-06-28 00:02:40,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:40,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:02:40,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:42,871 INFO L124 PetriNetUnfolderBase]: 4684/7091 cut-off events. [2024-06-28 00:02:42,871 INFO L125 PetriNetUnfolderBase]: For 1114204/1114206 co-relation queries the response was YES. [2024-06-28 00:02:42,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75919 conditions, 7091 events. 4684/7091 cut-off events. For 1114204/1114206 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 40307 event pairs, 1246 based on Foata normal form. 4/7095 useless extension candidates. Maximal degree in co-relation 75731. Up to 6959 conditions per place. [2024-06-28 00:02:43,032 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 707 selfloop transitions, 49 changer transitions 0/759 dead transitions. [2024-06-28 00:02:43,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 759 transitions, 18082 flow [2024-06-28 00:02:43,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:02:43,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:02:43,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-28 00:02:43,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2024-06-28 00:02:43,034 INFO L175 Difference]: Start difference. First operand has 417 places, 734 transitions, 16402 flow. Second operand 9 states and 145 transitions. [2024-06-28 00:02:43,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 759 transitions, 18082 flow [2024-06-28 00:02:46,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 759 transitions, 17591 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-28 00:02:46,739 INFO L231 Difference]: Finished difference. Result has 419 places, 736 transitions, 16091 flow [2024-06-28 00:02:46,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15911, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=685, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16091, PETRI_PLACES=419, PETRI_TRANSITIONS=736} [2024-06-28 00:02:46,740 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 378 predicate places. [2024-06-28 00:02:46,740 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 736 transitions, 16091 flow [2024-06-28 00:02:46,741 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) [2024-06-28 00:02:46,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:46,741 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 00:02:46,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-28 00:02:46,741 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)] === [2024-06-28 00:02:46,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:46,742 INFO L85 PathProgramCache]: Analyzing trace with hash -2112279891, now seen corresponding path program 6 times [2024-06-28 00:02:46,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:46,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439189152] [2024-06-28 00:02:46,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:46,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:46,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:49,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:49,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:49,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439189152] [2024-06-28 00:02:49,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439189152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:49,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:49,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:02:49,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473682499] [2024-06-28 00:02:49,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:49,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:02:49,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:49,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:02:49,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:02:49,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 00:02:49,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 736 transitions, 16091 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) [2024-06-28 00:02:49,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:49,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 00:02:49,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:51,631 INFO L124 PetriNetUnfolderBase]: 4704/7119 cut-off events. [2024-06-28 00:02:51,632 INFO L125 PetriNetUnfolderBase]: For 1139263/1139277 co-relation queries the response was YES. [2024-06-28 00:02:51,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75576 conditions, 7119 events. 4704/7119 cut-off events. For 1139263/1139277 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 40401 event pairs, 964 based on Foata normal form. 16/7135 useless extension candidates. Maximal degree in co-relation 75387. Up to 6166 conditions per place. [2024-06-28 00:02:51,765 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 537 selfloop transitions, 223 changer transitions 0/763 dead transitions. [2024-06-28 00:02:51,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 763 transitions, 18209 flow [2024-06-28 00:02:51,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:02:51,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:02:51,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-28 00:02:51,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-28 00:02:51,767 INFO L175 Difference]: Start difference. First operand has 419 places, 736 transitions, 16091 flow. Second operand 9 states and 165 transitions. [2024-06-28 00:02:51,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 763 transitions, 18209 flow [2024-06-28 00:02:55,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 763 transitions, 18047 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-28 00:02:55,824 INFO L231 Difference]: Finished difference. Result has 421 places, 740 transitions, 16484 flow [2024-06-28 00:02:55,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15929, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16484, PETRI_PLACES=421, PETRI_TRANSITIONS=740} [2024-06-28 00:02:55,825 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 380 predicate places. [2024-06-28 00:02:55,825 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 740 transitions, 16484 flow [2024-06-28 00:02:55,826 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) [2024-06-28 00:02:55,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:55,826 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 00:02:55,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-28 00:02:55,826 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)] === [2024-06-28 00:02:55,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:55,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1319640123, now seen corresponding path program 7 times [2024-06-28 00:02:55,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:55,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104411823] [2024-06-28 00:02:55,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:55,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:55,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:58,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:58,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:58,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104411823] [2024-06-28 00:02:58,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104411823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:58,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:58,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:02:58,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753525691] [2024-06-28 00:02:58,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:58,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:02:58,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:58,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:02:58,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:02:58,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 00:02:58,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 740 transitions, 16484 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) [2024-06-28 00:02:58,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:58,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 00:02:58,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:01,833 INFO L124 PetriNetUnfolderBase]: 4724/7147 cut-off events. [2024-06-28 00:03:01,833 INFO L125 PetriNetUnfolderBase]: For 1166078/1166092 co-relation queries the response was YES. [2024-06-28 00:03:01,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76735 conditions, 7147 events. 4724/7147 cut-off events. For 1166078/1166092 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 40613 event pairs, 969 based on Foata normal form. 16/7163 useless extension candidates. Maximal degree in co-relation 76545. Up to 6090 conditions per place. [2024-06-28 00:03:02,030 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 516 selfloop transitions, 248 changer transitions 0/767 dead transitions. [2024-06-28 00:03:02,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 767 transitions, 18602 flow [2024-06-28 00:03:02,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:03:02,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:03:02,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-28 00:03:02,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4638888888888889 [2024-06-28 00:03:02,033 INFO L175 Difference]: Start difference. First operand has 421 places, 740 transitions, 16484 flow. Second operand 9 states and 167 transitions. [2024-06-28 00:03:02,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 767 transitions, 18602 flow [2024-06-28 00:03:07,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 767 transitions, 18103 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-28 00:03:07,431 INFO L231 Difference]: Finished difference. Result has 423 places, 744 transitions, 16576 flow [2024-06-28 00:03:07,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15985, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=740, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16576, PETRI_PLACES=423, PETRI_TRANSITIONS=744} [2024-06-28 00:03:07,432 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 382 predicate places. [2024-06-28 00:03:07,432 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 744 transitions, 16576 flow [2024-06-28 00:03:07,432 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) [2024-06-28 00:03:07,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:07,432 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 00:03:07,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-28 00:03:07,433 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)] === [2024-06-28 00:03:07,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:07,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1055868937, now seen corresponding path program 5 times [2024-06-28 00:03:07,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:07,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527906323] [2024-06-28 00:03:07,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:07,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:07,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:09,760 INFO 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 00:03:09,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:09,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527906323] [2024-06-28 00:03:09,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527906323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:09,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:09,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:03:09,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265632072] [2024-06-28 00:03:09,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:09,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:03:09,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:09,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:03:09,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:03:09,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 00:03:09,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 744 transitions, 16576 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) [2024-06-28 00:03:09,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:09,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 00:03:09,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:12,455 INFO L124 PetriNetUnfolderBase]: 4825/7306 cut-off events. [2024-06-28 00:03:12,455 INFO L125 PetriNetUnfolderBase]: For 1290940/1290954 co-relation queries the response was YES. [2024-06-28 00:03:12,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78244 conditions, 7306 events. 4825/7306 cut-off events. For 1290940/1290954 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 41632 event pairs, 974 based on Foata normal form. 36/7342 useless extension candidates. Maximal degree in co-relation 78053. Up to 6178 conditions per place. [2024-06-28 00:03:12,591 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 540 selfloop transitions, 233 changer transitions 0/776 dead transitions. [2024-06-28 00:03:12,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 776 transitions, 18799 flow [2024-06-28 00:03:12,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:03:12,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:03:12,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-28 00:03:12,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46944444444444444 [2024-06-28 00:03:12,592 INFO L175 Difference]: Start difference. First operand has 423 places, 744 transitions, 16576 flow. Second operand 9 states and 169 transitions. [2024-06-28 00:03:12,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 776 transitions, 18799 flow [2024-06-28 00:03:17,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 776 transitions, 18336 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-28 00:03:17,222 INFO L231 Difference]: Finished difference. Result has 426 places, 749 transitions, 16728 flow [2024-06-28 00:03:17,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=16113, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16728, PETRI_PLACES=426, PETRI_TRANSITIONS=749} [2024-06-28 00:03:17,222 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 385 predicate places. [2024-06-28 00:03:17,223 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 749 transitions, 16728 flow [2024-06-28 00:03:17,223 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) [2024-06-28 00:03:17,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:17,223 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 00:03:17,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-28 00:03:17,223 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)] === [2024-06-28 00:03:17,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:17,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1709594783, now seen corresponding path program 4 times [2024-06-28 00:03:17,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:17,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811519599] [2024-06-28 00:03:17,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:17,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:17,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:18,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:18,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:18,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811519599] [2024-06-28 00:03:18,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811519599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:18,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:18,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:03:18,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440173627] [2024-06-28 00:03:18,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:18,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:03:18,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:18,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:03:18,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:03:18,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:03:18,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 749 transitions, 16728 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) [2024-06-28 00:03:18,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:18,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:03:18,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:21,508 INFO L124 PetriNetUnfolderBase]: 4905/7442 cut-off events. [2024-06-28 00:03:21,509 INFO L125 PetriNetUnfolderBase]: For 1281497/1281499 co-relation queries the response was YES. [2024-06-28 00:03:21,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79564 conditions, 7442 events. 4905/7442 cut-off events. For 1281497/1281499 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 42891 event pairs, 1564 based on Foata normal form. 16/7458 useless extension candidates. Maximal degree in co-relation 79372. Up to 6799 conditions per place. [2024-06-28 00:03:21,708 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 635 selfloop transitions, 150 changer transitions 0/788 dead transitions. [2024-06-28 00:03:21,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 788 transitions, 18725 flow [2024-06-28 00:03:21,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:03:21,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:03:21,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-28 00:03:21,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-28 00:03:21,710 INFO L175 Difference]: Start difference. First operand has 426 places, 749 transitions, 16728 flow. Second operand 8 states and 141 transitions. [2024-06-28 00:03:21,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 788 transitions, 18725 flow [2024-06-28 00:03:26,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 788 transitions, 18229 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-28 00:03:26,869 INFO L231 Difference]: Finished difference. Result has 427 places, 757 transitions, 16752 flow [2024-06-28 00:03:26,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=16232, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16752, PETRI_PLACES=427, PETRI_TRANSITIONS=757} [2024-06-28 00:03:26,870 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 386 predicate places. [2024-06-28 00:03:26,871 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 757 transitions, 16752 flow [2024-06-28 00:03:26,871 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) [2024-06-28 00:03:26,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:26,871 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 00:03:26,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-28 00:03:26,872 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)] === [2024-06-28 00:03:26,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:26,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1880417183, now seen corresponding path program 5 times [2024-06-28 00:03:26,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:26,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544431898] [2024-06-28 00:03:26,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:26,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:26,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:28,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:28,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:28,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544431898] [2024-06-28 00:03:28,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544431898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:28,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:28,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:03:28,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23913993] [2024-06-28 00:03:28,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:28,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:03:28,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:28,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:03:28,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:03:28,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:03:28,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 757 transitions, 16752 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) [2024-06-28 00:03:28,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:28,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:03:28,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:32,054 INFO L124 PetriNetUnfolderBase]: 5291/7977 cut-off events. [2024-06-28 00:03:32,054 INFO L125 PetriNetUnfolderBase]: For 1498128/1498130 co-relation queries the response was YES. [2024-06-28 00:03:32,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88448 conditions, 7977 events. 5291/7977 cut-off events. For 1498128/1498130 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 46003 event pairs, 1580 based on Foata normal form. 16/7993 useless extension candidates. Maximal degree in co-relation 88255. Up to 6149 conditions per place. [2024-06-28 00:03:32,231 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 608 selfloop transitions, 243 changer transitions 0/854 dead transitions. [2024-06-28 00:03:32,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 854 transitions, 20571 flow [2024-06-28 00:03:32,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:03:32,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:03:32,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-28 00:03:32,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48125 [2024-06-28 00:03:32,232 INFO L175 Difference]: Start difference. First operand has 427 places, 757 transitions, 16752 flow. Second operand 8 states and 154 transitions. [2024-06-28 00:03:32,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 854 transitions, 20571 flow [2024-06-28 00:03:38,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 854 transitions, 20270 flow, removed 69 selfloop flow, removed 4 redundant places. [2024-06-28 00:03:38,144 INFO L231 Difference]: Finished difference. Result has 434 places, 795 transitions, 18072 flow [2024-06-28 00:03:38,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=16451, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=757, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=18072, PETRI_PLACES=434, PETRI_TRANSITIONS=795} [2024-06-28 00:03:38,145 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 393 predicate places. [2024-06-28 00:03:38,145 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 795 transitions, 18072 flow [2024-06-28 00:03:38,145 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) [2024-06-28 00:03:38,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:38,146 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 00:03:38,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-28 00:03:38,146 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)] === [2024-06-28 00:03:38,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:38,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1962313015, now seen corresponding path program 4 times [2024-06-28 00:03:38,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:38,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948259304] [2024-06-28 00:03:38,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:38,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:38,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:39,948 INFO 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 00:03:39,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:39,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948259304] [2024-06-28 00:03:39,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948259304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:39,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:39,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:03:39,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866672925] [2024-06-28 00:03:39,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:39,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:03:39,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:39,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:03:39,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:03:40,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:03:40,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 795 transitions, 18072 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) [2024-06-28 00:03:40,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:40,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:03:40,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:42,727 INFO L124 PetriNetUnfolderBase]: 5251/7912 cut-off events. [2024-06-28 00:03:42,728 INFO L125 PetriNetUnfolderBase]: For 1459899/1459903 co-relation queries the response was YES. [2024-06-28 00:03:42,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89014 conditions, 7912 events. 5251/7912 cut-off events. For 1459899/1459903 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 45493 event pairs, 1596 based on Foata normal form. 12/7924 useless extension candidates. Maximal degree in co-relation 88816. Up to 7160 conditions per place. [2024-06-28 00:03:42,901 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 627 selfloop transitions, 191 changer transitions 0/821 dead transitions. [2024-06-28 00:03:42,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 821 transitions, 20329 flow [2024-06-28 00:03:42,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:03:42,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:03:42,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-28 00:03:42,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-28 00:03:42,903 INFO L175 Difference]: Start difference. First operand has 434 places, 795 transitions, 18072 flow. Second operand 8 states and 142 transitions. [2024-06-28 00:03:42,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 821 transitions, 20329 flow [2024-06-28 00:03:48,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 821 transitions, 19974 flow, removed 124 selfloop flow, removed 2 redundant places. [2024-06-28 00:03:48,057 INFO L231 Difference]: Finished difference. Result has 440 places, 799 transitions, 18200 flow [2024-06-28 00:03:48,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=17717, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=795, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=18200, PETRI_PLACES=440, PETRI_TRANSITIONS=799} [2024-06-28 00:03:48,057 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 399 predicate places. [2024-06-28 00:03:48,058 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 799 transitions, 18200 flow [2024-06-28 00:03:48,058 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) [2024-06-28 00:03:48,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:48,058 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 00:03:48,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-28 00:03:48,058 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)] === [2024-06-28 00:03:48,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:48,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1601234285, now seen corresponding path program 5 times [2024-06-28 00:03:48,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:48,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838764208] [2024-06-28 00:03:48,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:48,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:48,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:50,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:50,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:50,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838764208] [2024-06-28 00:03:50,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838764208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:50,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:50,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:03:50,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614695799] [2024-06-28 00:03:50,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:50,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:03:50,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:50,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:03:50,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:03:50,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:03:50,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 799 transitions, 18200 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) [2024-06-28 00:03:50,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:50,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:03:50,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:54,149 INFO L124 PetriNetUnfolderBase]: 5271/7939 cut-off events. [2024-06-28 00:03:54,149 INFO L125 PetriNetUnfolderBase]: For 1456969/1456973 co-relation queries the response was YES. [2024-06-28 00:03:54,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89458 conditions, 7939 events. 5271/7939 cut-off events. For 1456969/1456973 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 45624 event pairs, 1592 based on Foata normal form. 8/7947 useless extension candidates. Maximal degree in co-relation 89257. Up to 7176 conditions per place. [2024-06-28 00:03:54,291 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 641 selfloop transitions, 177 changer transitions 0/821 dead transitions. [2024-06-28 00:03:54,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 821 transitions, 20444 flow [2024-06-28 00:03:54,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:03:54,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:03:54,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-28 00:03:54,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-28 00:03:54,293 INFO L175 Difference]: Start difference. First operand has 440 places, 799 transitions, 18200 flow. Second operand 9 states and 147 transitions. [2024-06-28 00:03:54,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 821 transitions, 20444 flow [2024-06-28 00:04:00,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 821 transitions, 20241 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-28 00:04:00,066 INFO L231 Difference]: Finished difference. Result has 445 places, 803 transitions, 18480 flow [2024-06-28 00:04:00,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=18002, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=799, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18480, PETRI_PLACES=445, PETRI_TRANSITIONS=803} [2024-06-28 00:04:00,067 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 404 predicate places. [2024-06-28 00:04:00,067 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 803 transitions, 18480 flow [2024-06-28 00:04:00,068 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) [2024-06-28 00:04:00,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:00,068 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 00:04:00,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-28 00:04:00,068 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)] === [2024-06-28 00:04:00,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:00,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1601471621, now seen corresponding path program 6 times [2024-06-28 00:04:00,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:00,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278464430] [2024-06-28 00:04:00,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:00,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:00,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:01,804 INFO 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 00:04:01,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:01,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278464430] [2024-06-28 00:04:01,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278464430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:01,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:01,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:01,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688083623] [2024-06-28 00:04:01,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:01,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:01,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:01,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:01,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:01,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:04:01,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 803 transitions, 18480 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) [2024-06-28 00:04:01,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:01,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:04:01,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:05,460 INFO L124 PetriNetUnfolderBase]: 5297/7979 cut-off events. [2024-06-28 00:04:05,461 INFO L125 PetriNetUnfolderBase]: For 1486433/1486435 co-relation queries the response was YES. [2024-06-28 00:04:05,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90407 conditions, 7979 events. 5297/7979 cut-off events. For 1486433/1486435 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 45938 event pairs, 1621 based on Foata normal form. 4/7983 useless extension candidates. Maximal degree in co-relation 90205. Up to 7323 conditions per place. [2024-06-28 00:04:05,622 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 681 selfloop transitions, 154 changer transitions 0/838 dead transitions. [2024-06-28 00:04:05,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 838 transitions, 20992 flow [2024-06-28 00:04:05,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:04:05,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:04:05,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-28 00:04:05,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-28 00:04:05,624 INFO L175 Difference]: Start difference. First operand has 445 places, 803 transitions, 18480 flow. Second operand 8 states and 136 transitions. [2024-06-28 00:04:05,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 838 transitions, 20992 flow [2024-06-28 00:04:10,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 838 transitions, 20696 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-28 00:04:10,730 INFO L231 Difference]: Finished difference. Result has 448 places, 818 transitions, 18831 flow [2024-06-28 00:04:10,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=18184, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=803, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=655, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=18831, PETRI_PLACES=448, PETRI_TRANSITIONS=818} [2024-06-28 00:04:10,731 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 407 predicate places. [2024-06-28 00:04:10,731 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 818 transitions, 18831 flow [2024-06-28 00:04:10,731 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) [2024-06-28 00:04:10,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:10,732 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 00:04:10,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-28 00:04:10,732 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)] === [2024-06-28 00:04:10,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:10,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1886846459, now seen corresponding path program 6 times [2024-06-28 00:04:10,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:10,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710994901] [2024-06-28 00:04:10,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:10,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:12,741 INFO 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 00:04:12,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:12,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710994901] [2024-06-28 00:04:12,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710994901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:12,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:12,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:12,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346593620] [2024-06-28 00:04:12,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:12,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:12,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:12,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:12,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:12,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:04:12,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 818 transitions, 18831 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) [2024-06-28 00:04:12,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:12,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:04:12,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:16,559 INFO L124 PetriNetUnfolderBase]: 5285/7960 cut-off events. [2024-06-28 00:04:16,559 INFO L125 PetriNetUnfolderBase]: For 1498855/1498859 co-relation queries the response was YES. [2024-06-28 00:04:16,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90194 conditions, 7960 events. 5285/7960 cut-off events. For 1498855/1498859 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 45784 event pairs, 1587 based on Foata normal form. 8/7968 useless extension candidates. Maximal degree in co-relation 89990. Up to 7204 conditions per place. [2024-06-28 00:04:16,773 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 658 selfloop transitions, 176 changer transitions 0/837 dead transitions. [2024-06-28 00:04:16,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 837 transitions, 21019 flow [2024-06-28 00:04:16,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:04:16,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:04:16,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-28 00:04:16,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41388888888888886 [2024-06-28 00:04:16,775 INFO L175 Difference]: Start difference. First operand has 448 places, 818 transitions, 18831 flow. Second operand 9 states and 149 transitions. [2024-06-28 00:04:16,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 837 transitions, 21019 flow [2024-06-28 00:04:22,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 837 transitions, 20807 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-28 00:04:22,939 INFO L231 Difference]: Finished difference. Result has 454 places, 818 transitions, 18983 flow [2024-06-28 00:04:22,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=18619, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=818, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=642, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18983, PETRI_PLACES=454, PETRI_TRANSITIONS=818} [2024-06-28 00:04:22,940 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 413 predicate places. [2024-06-28 00:04:22,940 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 818 transitions, 18983 flow [2024-06-28 00:04:22,940 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) [2024-06-28 00:04:22,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:22,940 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 00:04:22,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-28 00:04:22,941 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)] === [2024-06-28 00:04:22,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:22,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1887092537, now seen corresponding path program 2 times [2024-06-28 00:04:22,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:22,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842586049] [2024-06-28 00:04:22,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:22,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:22,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:25,542 INFO 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 00:04:25,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:25,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842586049] [2024-06-28 00:04:25,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842586049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:25,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:25,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:25,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041282495] [2024-06-28 00:04:25,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:25,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:25,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:25,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:25,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:25,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:04:25,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 818 transitions, 18983 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) [2024-06-28 00:04:25,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:25,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:04:25,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:29,869 INFO L124 PetriNetUnfolderBase]: 5301/7978 cut-off events. [2024-06-28 00:04:29,869 INFO L125 PetriNetUnfolderBase]: For 1525360/1525360 co-relation queries the response was YES. [2024-06-28 00:04:29,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90823 conditions, 7978 events. 5301/7978 cut-off events. For 1525360/1525360 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 45847 event pairs, 1650 based on Foata normal form. 2/7980 useless extension candidates. Maximal degree in co-relation 90618. Up to 7851 conditions per place. [2024-06-28 00:04:30,033 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 794 selfloop transitions, 42 changer transitions 0/839 dead transitions. [2024-06-28 00:04:30,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 839 transitions, 20819 flow [2024-06-28 00:04:30,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:04:30,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:04:30,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-28 00:04:30,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37777777777777777 [2024-06-28 00:04:30,035 INFO L175 Difference]: Start difference. First operand has 454 places, 818 transitions, 18983 flow. Second operand 9 states and 136 transitions. [2024-06-28 00:04:30,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 839 transitions, 20819 flow [2024-06-28 00:04:34,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 839 transitions, 20528 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-28 00:04:34,836 INFO L231 Difference]: Finished difference. Result has 456 places, 822 transitions, 18882 flow [2024-06-28 00:04:34,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=18692, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=818, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=776, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18882, PETRI_PLACES=456, PETRI_TRANSITIONS=822} [2024-06-28 00:04:34,837 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 415 predicate places. [2024-06-28 00:04:34,837 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 822 transitions, 18882 flow [2024-06-28 00:04:34,837 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) [2024-06-28 00:04:34,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:34,837 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 00:04:34,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-28 00:04:34,838 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)] === [2024-06-28 00:04:34,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:34,838 INFO L85 PathProgramCache]: Analyzing trace with hash 362194813, now seen corresponding path program 7 times [2024-06-28 00:04:34,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:34,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387376429] [2024-06-28 00:04:34,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:34,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:34,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:36,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:36,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:36,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387376429] [2024-06-28 00:04:36,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387376429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:36,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:36,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:36,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475836392] [2024-06-28 00:04:36,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:36,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:36,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:36,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:36,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:36,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:04:36,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 822 transitions, 18882 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) [2024-06-28 00:04:36,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:36,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:04:36,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:39,778 INFO L124 PetriNetUnfolderBase]: 5329/8017 cut-off events. [2024-06-28 00:04:39,778 INFO L125 PetriNetUnfolderBase]: For 1549141/1549141 co-relation queries the response was YES. [2024-06-28 00:04:39,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91192 conditions, 8017 events. 5329/8017 cut-off events. For 1549141/1549141 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 46103 event pairs, 1667 based on Foata normal form. 2/8019 useless extension candidates. Maximal degree in co-relation 90986. Up to 7893 conditions per place. [2024-06-28 00:04:39,914 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 810 selfloop transitions, 45 changer transitions 0/858 dead transitions. [2024-06-28 00:04:39,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 858 transitions, 21296 flow [2024-06-28 00:04:39,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:04:39,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:04:39,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-28 00:04:39,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2024-06-28 00:04:39,916 INFO L175 Difference]: Start difference. First operand has 456 places, 822 transitions, 18882 flow. Second operand 9 states and 145 transitions. [2024-06-28 00:04:39,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 858 transitions, 21296 flow [2024-06-28 00:04:45,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 858 transitions, 21144 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-28 00:04:45,473 INFO L231 Difference]: Finished difference. Result has 460 places, 838 transitions, 19291 flow [2024-06-28 00:04:45,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=18730, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=822, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=778, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=19291, PETRI_PLACES=460, PETRI_TRANSITIONS=838} [2024-06-28 00:04:45,474 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 419 predicate places. [2024-06-28 00:04:45,474 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 838 transitions, 19291 flow [2024-06-28 00:04:45,475 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) [2024-06-28 00:04:45,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:45,476 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 00:04:45,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-28 00:04:45,476 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)] === [2024-06-28 00:04:45,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:45,476 INFO L85 PathProgramCache]: Analyzing trace with hash 134408983, now seen corresponding path program 8 times [2024-06-28 00:04:45,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:45,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756451002] [2024-06-28 00:04:45,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:45,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:45,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:47,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:47,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:47,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756451002] [2024-06-28 00:04:47,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756451002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:47,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:47,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:47,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339378891] [2024-06-28 00:04:47,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:47,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:47,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:47,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:47,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:47,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:04:47,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 838 transitions, 19291 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) [2024-06-28 00:04:47,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:47,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:04:47,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:50,633 INFO L124 PetriNetUnfolderBase]: 5364/8068 cut-off events. [2024-06-28 00:04:50,633 INFO L125 PetriNetUnfolderBase]: For 1609046/1609046 co-relation queries the response was YES. [2024-06-28 00:04:51,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92137 conditions, 8068 events. 5364/8068 cut-off events. For 1609046/1609046 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 46461 event pairs, 1663 based on Foata normal form. 7/8075 useless extension candidates. Maximal degree in co-relation 91928. Up to 7853 conditions per place. [2024-06-28 00:04:51,160 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 813 selfloop transitions, 56 changer transitions 0/872 dead transitions. [2024-06-28 00:04:51,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 872 transitions, 21395 flow [2024-06-28 00:04:51,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:04:51,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:04:51,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-28 00:04:51,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-28 00:04:51,162 INFO L175 Difference]: Start difference. First operand has 460 places, 838 transitions, 19291 flow. Second operand 8 states and 134 transitions. [2024-06-28 00:04:51,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 872 transitions, 21395 flow [2024-06-28 00:04:57,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 872 transitions, 21291 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-28 00:04:57,254 INFO L231 Difference]: Finished difference. Result has 463 places, 841 transitions, 19398 flow [2024-06-28 00:04:57,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=19187, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=838, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=782, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=19398, PETRI_PLACES=463, PETRI_TRANSITIONS=841} [2024-06-28 00:04:57,255 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 422 predicate places. [2024-06-28 00:04:57,255 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 841 transitions, 19398 flow [2024-06-28 00:04:57,255 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) [2024-06-28 00:04:57,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:57,256 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 00:04:57,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-28 00:04:57,256 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)] === [2024-06-28 00:04:57,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:57,256 INFO L85 PathProgramCache]: Analyzing trace with hash 134413633, now seen corresponding path program 9 times [2024-06-28 00:04:57,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:57,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449697496] [2024-06-28 00:04:57,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:57,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:57,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:58,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:58,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:58,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449697496] [2024-06-28 00:04:58,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449697496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:58,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:58,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:58,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736661035] [2024-06-28 00:04:58,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:58,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:58,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:58,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:58,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:58,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 00:04:58,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 841 transitions, 19398 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) [2024-06-28 00:04:58,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:58,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 00:04:58,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:05:02,060 INFO L124 PetriNetUnfolderBase]: 5366/8071 cut-off events. [2024-06-28 00:05:02,060 INFO L125 PetriNetUnfolderBase]: For 1602823/1602823 co-relation queries the response was YES. [2024-06-28 00:05:02,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92489 conditions, 8071 events. 5366/8071 cut-off events. For 1602823/1602823 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 46464 event pairs, 1659 based on Foata normal form. 2/8073 useless extension candidates. Maximal degree in co-relation 92278. Up to 7806 conditions per place. [2024-06-28 00:05:02,220 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 779 selfloop transitions, 95 changer transitions 0/877 dead transitions. [2024-06-28 00:05:02,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 877 transitions, 21834 flow [2024-06-28 00:05:02,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:05:02,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:05:02,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-28 00:05:02,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-28 00:05:02,222 INFO L175 Difference]: Start difference. First operand has 463 places, 841 transitions, 19398 flow. Second operand 8 states and 134 transitions. [2024-06-28 00:05:02,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 877 transitions, 21834 flow