./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe003_power.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe003_power.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe003_power.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe003_power.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 19:22:04,038 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 19:22:04,091 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 19:22:04,095 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 19:22:04,095 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 19:22:04,110 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 19:22:04,111 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 19:22:04,111 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 19:22:04,112 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 19:22:04,112 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 19:22:04,113 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 19:22:04,113 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 19:22:04,113 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 19:22:04,114 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 19:22:04,114 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 19:22:04,114 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 19:22:04,115 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 19:22:04,115 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 19:22:04,115 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 19:22:04,115 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 19:22:04,115 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 19:22:04,116 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 19:22:04,116 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 19:22:04,116 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 19:22:04,117 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 19:22:04,117 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 19:22:04,117 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 19:22:04,117 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 19:22:04,118 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 19:22:04,118 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 19:22:04,118 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 19:22:04,118 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 19:22:04,118 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 19:22:04,119 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 19:22:04,119 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 19:22:04,119 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 19:22:04,119 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 19:22:04,119 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 19:22:04,120 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 19:22:04,120 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 19:22:04,120 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 19:22:04,120 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 19:22:04,120 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 19:22:04,121 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 19:22:04,336 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 19:22:04,359 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 19:22:04,361 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 19:22:04,362 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 19:22:04,362 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 19:22:04,363 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe003_power.opt.yml/witness.yml [2024-06-21 19:22:04,452 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 19:22:04,452 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 19:22:04,454 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe003_power.opt.i [2024-06-21 19:22:05,520 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 19:22:05,738 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 19:22:05,742 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe003_power.opt.i [2024-06-21 19:22:05,762 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/191dda990/0557be5bf2914912abeee3f10913cb02/FLAGd19492b26 [2024-06-21 19:22:05,775 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/191dda990/0557be5bf2914912abeee3f10913cb02 [2024-06-21 19:22:05,777 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 19:22:05,778 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 19:22:05,781 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 19:22:05,781 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 19:22:05,785 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 19:22:05,785 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:22:04" (1/2) ... [2024-06-21 19:22:05,786 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47df6d1b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:22:05, skipping insertion in model container [2024-06-21 19:22:05,787 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:22:04" (1/2) ... [2024-06-21 19:22:05,790 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2280990d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:22:05, skipping insertion in model container [2024-06-21 19:22:05,790 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 07:22:05" (2/2) ... [2024-06-21 19:22:05,790 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47df6d1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:22:05, skipping insertion in model container [2024-06-21 19:22:05,791 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 07:22:05" (2/2) ... [2024-06-21 19:22:05,791 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 19:22:05,811 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 19:22:05,813 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )x) + (long long )x$r_buff0_thd1 >= 0LL && (0LL - (long long )x) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$mem_tmp) + (long long )x$r_buff0_thd1 >= 0LL) && (0LL - (long long )x$mem_tmp) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff0_thd1) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd1) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd1) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )x) + (long long )x$flush_delayed >= 0LL) && (1LL - (long long )x) + (long long )x$mem_tmp >= 0LL) && (1LL - (long long )x) + (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )x) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )x) + (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )x) + (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )x) + (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )x) + (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )x) + (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )x) + (long long )x$read_delayed >= 0LL) && (1LL - (long long )x) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )x) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )x) + (long long )x$w_buff1_used >= 0LL) && (1LL - (long long )x) + (long long )y >= 0LL) && (1LL - (long long )x$mem_tmp) + (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )x$mem_tmp) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )x$mem_tmp) + (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )x$mem_tmp) + (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )x$mem_tmp) + (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )x$mem_tmp) + (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )x$mem_tmp) + (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )x$mem_tmp) + (long long )x$read_delayed >= 0LL) && (1LL - (long long )x$mem_tmp) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )x$mem_tmp) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )x$mem_tmp) + (long long )x$w_buff1_used >= 0LL) && (1LL - (long long )x$mem_tmp) + (long long )y >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$flush_delayed) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$flush_delayed) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$mem_tmp) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$mem_tmp) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff0_thd0) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff0_thd0) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff0_thd1) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff0_thd1) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff0_thd2) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff0_thd2) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff0_thd3) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff0_thd3) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff1_thd0) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff1_thd0) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff1_thd1) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff1_thd1) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff1_thd2) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff1_thd2) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff1_thd3) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff1_thd3) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$read_delayed) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$w_buff0) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$w_buff0) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$w_buff0_used) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$w_buff0_used) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$w_buff1) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$w_buff1) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$w_buff1_used) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$w_buff1_used) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p2_EBX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p2_EBX) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )x >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )x$flush_delayed) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice0) - (long long )x >= 0LL) && (1LL + (long long )weak$$choice0) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice1) - (long long )x >= 0LL) && (1LL + (long long )weak$$choice1) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice2) - (long long )x >= 0LL) && (1LL + (long long )weak$$choice2) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$flush_delayed) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$flush_delayed) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$mem_tmp) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$mem_tmp) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff0_thd0) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff0_thd0) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff0_thd1) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff0_thd1) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff0_thd2) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff0_thd2) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff0_thd3) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff0_thd3) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff1_thd0) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff1_thd0) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff1_thd1) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff1_thd1) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff1_thd2) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff1_thd2) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff1_thd3) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff1_thd3) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$w_buff0) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$w_buff0) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$w_buff0_used) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$w_buff0_used) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$w_buff1) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$w_buff1) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$w_buff1_used) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$w_buff1_used) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )x) - (long long )x$flush_delayed >= 0LL) && (1LL - (long long )x) - (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )x) - (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )x) - (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )x) - (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )x) - (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )x) - (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )x) - (long long )x$read_delayed >= 0LL) && (1LL - (long long )x$flush_delayed) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )x$mem_tmp) - (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )x$mem_tmp) - (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )x$mem_tmp) - (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )x$mem_tmp) - (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )x$mem_tmp) - (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )x$mem_tmp) - (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )x$mem_tmp) - (long long )x$read_delayed >= 0LL) && (2LL - (long long )x) - (long long )x$mem_tmp >= 0LL) && (2LL - (long long )x) - (long long )x$r_buff0_thd1 >= 0LL) && (2LL - (long long )x) - (long long )x$r_buff1_thd1 >= 0LL) && (2LL - (long long )x) - (long long )x$w_buff0 >= 0LL) && (2LL - (long long )x) - (long long )x$w_buff0_used >= 0LL) && (2LL - (long long )x) - (long long )x$w_buff1 >= 0LL) && (2LL - (long long )x) - (long long )x$w_buff1_used >= 0LL) && (2LL - (long long )x$mem_tmp) - (long long )x$r_buff0_thd1 >= 0LL) && (2LL - (long long )x$mem_tmp) - (long long )x$r_buff1_thd1 >= 0LL) && (2LL - (long long )x$mem_tmp) - (long long )x$w_buff0 >= 0LL) && (2LL - (long long )x$mem_tmp) - (long long )x$w_buff0_used >= 0LL) && (2LL - (long long )x$mem_tmp) - (long long )x$w_buff1 >= 0LL) && (2LL - (long long )x$mem_tmp) - (long long )x$w_buff1_used >= 0LL) && (3LL - (long long )x) - (long long )y >= 0LL) && (3LL - (long long )x$mem_tmp) - (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX$read_delayed - (long long )x$mem_tmp >= 0LL) && (long long )__unbuffered_p1_EAX$read_delayed - (long long )weak$$choice0 >= 0LL) && (long long )__unbuffered_p1_EAX$read_delayed - (long long )weak$$choice2 >= 0LL) && (long long )x - (long long )x$mem_tmp >= 0LL) && (long long )x$r_buff0_thd1 - (long long )x$r_buff1_thd1 >= 0LL) && (long long )x$r_buff0_thd1 - (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff0_thd1 - (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff0_thd1 - (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff0_thd1 - (long long )x$w_buff1_used >= 0LL) && (long long )x$r_buff1_thd1 - (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff1_thd1 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff0_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1 >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff1 - (long long )x$w_buff1_used >= 0LL) [2024-06-21 19:22:05,813 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )x) + (long long )x$r_buff0_thd1 >= 0LL && (0LL - (long long )x) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$mem_tmp) + (long long )x$r_buff0_thd1 >= 0LL) && (0LL - (long long )x$mem_tmp) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff0_thd1) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd1) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd1) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )x) + (long long )x$flush_delayed >= 0LL) && (1LL - (long long )x) + (long long )x$mem_tmp >= 0LL) && (1LL - (long long )x) + (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )x) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )x) + (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )x) + (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )x) + (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )x) + (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )x) + (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )x) + (long long )x$read_delayed >= 0LL) && (1LL - (long long )x) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )x) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )x) + (long long )x$w_buff1_used >= 0LL) && (1LL - (long long )x) + (long long )y >= 0LL) && (1LL - (long long )x$mem_tmp) + (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )x$mem_tmp) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )x$mem_tmp) + (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )x$mem_tmp) + (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )x$mem_tmp) + (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )x$mem_tmp) + (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )x$mem_tmp) + (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )x$mem_tmp) + (long long )x$read_delayed >= 0LL) && (1LL - (long long )x$mem_tmp) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )x$mem_tmp) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )x$mem_tmp) + (long long )x$w_buff1_used >= 0LL) && (1LL - (long long )x$mem_tmp) + (long long )y >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$flush_delayed) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$flush_delayed) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$mem_tmp) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$mem_tmp) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff0_thd0) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff0_thd0) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff0_thd1) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff0_thd1) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff0_thd2) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff0_thd2) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff0_thd3) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff0_thd3) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff1_thd0) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff1_thd0) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff1_thd1) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff1_thd1) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff1_thd2) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff1_thd2) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff1_thd3) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff1_thd3) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$read_delayed) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$w_buff0) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$w_buff0) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$w_buff0_used) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$w_buff0_used) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$w_buff1) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$w_buff1) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$w_buff1_used) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$w_buff1_used) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p2_EBX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p2_EBX) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )x >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )x$flush_delayed) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice0) - (long long )x >= 0LL) && (1LL + (long long )weak$$choice0) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice1) - (long long )x >= 0LL) && (1LL + (long long )weak$$choice1) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice2) - (long long )x >= 0LL) && (1LL + (long long )weak$$choice2) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$flush_delayed) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$flush_delayed) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$mem_tmp) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$mem_tmp) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff0_thd0) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff0_thd0) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff0_thd1) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff0_thd1) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff0_thd2) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff0_thd2) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff0_thd3) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff0_thd3) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff1_thd0) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff1_thd0) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff1_thd1) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff1_thd1) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff1_thd2) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff1_thd2) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff1_thd3) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff1_thd3) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$w_buff0) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$w_buff0) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$w_buff0_used) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$w_buff0_used) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$w_buff1) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$w_buff1) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$w_buff1_used) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$w_buff1_used) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )x) - (long long )x$flush_delayed >= 0LL) && (1LL - (long long )x) - (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )x) - (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )x) - (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )x) - (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )x) - (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )x) - (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )x) - (long long )x$read_delayed >= 0LL) && (1LL - (long long )x$flush_delayed) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )x$mem_tmp) - (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )x$mem_tmp) - (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )x$mem_tmp) - (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )x$mem_tmp) - (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )x$mem_tmp) - (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )x$mem_tmp) - (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )x$mem_tmp) - (long long )x$read_delayed >= 0LL) && (2LL - (long long )x) - (long long )x$mem_tmp >= 0LL) && (2LL - (long long )x) - (long long )x$r_buff0_thd1 >= 0LL) && (2LL - (long long )x) - (long long )x$r_buff1_thd1 >= 0LL) && (2LL - (long long )x) - (long long )x$w_buff0 >= 0LL) && (2LL - (long long )x) - (long long )x$w_buff0_used >= 0LL) && (2LL - (long long )x) - (long long )x$w_buff1 >= 0LL) && (2LL - (long long )x) - (long long )x$w_buff1_used >= 0LL) && (2LL - (long long )x$mem_tmp) - (long long )x$r_buff0_thd1 >= 0LL) && (2LL - (long long )x$mem_tmp) - (long long )x$r_buff1_thd1 >= 0LL) && (2LL - (long long )x$mem_tmp) - (long long )x$w_buff0 >= 0LL) && (2LL - (long long )x$mem_tmp) - (long long )x$w_buff0_used >= 0LL) && (2LL - (long long )x$mem_tmp) - (long long )x$w_buff1 >= 0LL) && (2LL - (long long )x$mem_tmp) - (long long )x$w_buff1_used >= 0LL) && (3LL - (long long )x) - (long long )y >= 0LL) && (3LL - (long long )x$mem_tmp) - (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX$read_delayed - (long long )x$mem_tmp >= 0LL) && (long long )__unbuffered_p1_EAX$read_delayed - (long long )weak$$choice0 >= 0LL) && (long long )__unbuffered_p1_EAX$read_delayed - (long long )weak$$choice2 >= 0LL) && (long long )x - (long long )x$mem_tmp >= 0LL) && (long long )x$r_buff0_thd1 - (long long )x$r_buff1_thd1 >= 0LL) && (long long )x$r_buff0_thd1 - (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff0_thd1 - (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff0_thd1 - (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff0_thd1 - (long long )x$w_buff1_used >= 0LL) && (long long )x$r_buff1_thd1 - (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff1_thd1 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff0_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1 >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff1 - (long long )x$w_buff1_used >= 0LL) [2024-06-21 19:22:05,814 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )x) + (long long )x$r_buff0_thd1 >= 0LL && (0LL - (long long )x) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$mem_tmp) + (long long )x$r_buff0_thd1 >= 0LL) && (0LL - (long long )x$mem_tmp) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff0_thd1) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd1) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd1) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )x) + (long long )x$flush_delayed >= 0LL) && (1LL - (long long )x) + (long long )x$mem_tmp >= 0LL) && (1LL - (long long )x) + (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )x) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )x) + (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )x) + (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )x) + (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )x) + (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )x) + (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )x) + (long long )x$read_delayed >= 0LL) && (1LL - (long long )x) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )x) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )x) + (long long )x$w_buff1_used >= 0LL) && (1LL - (long long )x) + (long long )y >= 0LL) && (1LL - (long long )x$mem_tmp) + (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )x$mem_tmp) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )x$mem_tmp) + (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )x$mem_tmp) + (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )x$mem_tmp) + (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )x$mem_tmp) + (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )x$mem_tmp) + (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )x$mem_tmp) + (long long )x$read_delayed >= 0LL) && (1LL - (long long )x$mem_tmp) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )x$mem_tmp) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )x$mem_tmp) + (long long )x$w_buff1_used >= 0LL) && (1LL - (long long )x$mem_tmp) + (long long )y >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$flush_delayed) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$flush_delayed) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$mem_tmp) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$mem_tmp) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff0_thd0) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff0_thd0) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff0_thd1) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff0_thd1) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff0_thd2) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff0_thd2) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff0_thd3) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff0_thd3) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff1_thd0) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff1_thd0) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff1_thd1) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff1_thd1) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff1_thd2) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff1_thd2) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff1_thd3) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$r_buff1_thd3) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$read_delayed) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$w_buff0) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$w_buff0) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$w_buff0_used) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$w_buff0_used) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$w_buff1) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$w_buff1) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$w_buff1_used) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX$w_buff1_used) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p2_EBX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p2_EBX) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )x >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )x$flush_delayed) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice0) - (long long )x >= 0LL) && (1LL + (long long )weak$$choice0) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice1) - (long long )x >= 0LL) && (1LL + (long long )weak$$choice1) - (long long )x$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice2) - (long long )x >= 0LL) && (1LL + (long long )weak$$choice2) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$flush_delayed) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$flush_delayed) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$mem_tmp) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$mem_tmp) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff0_thd0) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff0_thd0) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff0_thd1) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff0_thd1) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff0_thd2) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff0_thd2) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff0_thd3) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff0_thd3) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff1_thd0) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff1_thd0) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff1_thd1) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff1_thd1) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff1_thd2) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff1_thd2) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff1_thd3) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$r_buff1_thd3) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$w_buff0) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$w_buff0) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$w_buff0_used) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$w_buff0_used) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$w_buff1) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$w_buff1) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$w_buff1_used) - (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX$w_buff1_used) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )x) - (long long )x$flush_delayed >= 0LL) && (1LL - (long long )x) - (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )x) - (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )x) - (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )x) - (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )x) - (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )x) - (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )x) - (long long )x$read_delayed >= 0LL) && (1LL - (long long )x$flush_delayed) - (long long )x$mem_tmp >= 0LL) && (1LL - (long long )x$mem_tmp) - (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )x$mem_tmp) - (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )x$mem_tmp) - (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )x$mem_tmp) - (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )x$mem_tmp) - (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )x$mem_tmp) - (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )x$mem_tmp) - (long long )x$read_delayed >= 0LL) && (2LL - (long long )x) - (long long )x$mem_tmp >= 0LL) && (2LL - (long long )x) - (long long )x$r_buff0_thd1 >= 0LL) && (2LL - (long long )x) - (long long )x$r_buff1_thd1 >= 0LL) && (2LL - (long long )x) - (long long )x$w_buff0 >= 0LL) && (2LL - (long long )x) - (long long )x$w_buff0_used >= 0LL) && (2LL - (long long )x) - (long long )x$w_buff1 >= 0LL) && (2LL - (long long )x) - (long long )x$w_buff1_used >= 0LL) && (2LL - (long long )x$mem_tmp) - (long long )x$r_buff0_thd1 >= 0LL) && (2LL - (long long )x$mem_tmp) - (long long )x$r_buff1_thd1 >= 0LL) && (2LL - (long long )x$mem_tmp) - (long long )x$w_buff0 >= 0LL) && (2LL - (long long )x$mem_tmp) - (long long )x$w_buff0_used >= 0LL) && (2LL - (long long )x$mem_tmp) - (long long )x$w_buff1 >= 0LL) && (2LL - (long long )x$mem_tmp) - (long long )x$w_buff1_used >= 0LL) && (3LL - (long long )x) - (long long )y >= 0LL) && (3LL - (long long )x$mem_tmp) - (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX$read_delayed - (long long )x$mem_tmp >= 0LL) && (long long )__unbuffered_p1_EAX$read_delayed - (long long )weak$$choice0 >= 0LL) && (long long )__unbuffered_p1_EAX$read_delayed - (long long )weak$$choice2 >= 0LL) && (long long )x - (long long )x$mem_tmp >= 0LL) && (long long )x$r_buff0_thd1 - (long long )x$r_buff1_thd1 >= 0LL) && (long long )x$r_buff0_thd1 - (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff0_thd1 - (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff0_thd1 - (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff0_thd1 - (long long )x$w_buff1_used >= 0LL) && (long long )x$r_buff1_thd1 - (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff1_thd1 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff0_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1 >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff1 - (long long )x$w_buff1_used >= 0LL) [2024-06-21 19:22:05,814 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 19:22:05,814 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-06-21 19:22:05,853 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 19:22:06,178 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 19:22:06,194 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 19:22:06,520 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 19:22:06,579 INFO L206 MainTranslator]: Completed translation [2024-06-21 19:22:06,579 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:22:06 WrapperNode [2024-06-21 19:22:06,579 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 19:22:06,580 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 19:22:06,580 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 19:22:06,580 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 19:22:06,586 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:22:06" (1/1) ... [2024-06-21 19:22:06,617 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:22:06" (1/1) ... [2024-06-21 19:22:06,675 INFO L138 Inliner]: procedures = 175, calls = 269, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 803 [2024-06-21 19:22:06,676 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 19:22:06,676 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 19:22:06,676 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 19:22:06,677 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 19:22:06,686 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:22:06" (1/1) ... [2024-06-21 19:22:06,686 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:22:06" (1/1) ... [2024-06-21 19:22:06,695 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:22:06" (1/1) ... [2024-06-21 19:22:06,722 INFO L175 MemorySlicer]: Split 227 memory accesses to 2 slices as follows [2, 225]. 99 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 6 writes are split as follows [0, 6]. [2024-06-21 19:22:06,723 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:22:06" (1/1) ... [2024-06-21 19:22:06,723 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:22:06" (1/1) ... [2024-06-21 19:22:06,741 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:22:06" (1/1) ... [2024-06-21 19:22:06,744 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:22:06" (1/1) ... [2024-06-21 19:22:06,748 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:22:06" (1/1) ... [2024-06-21 19:22:06,767 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:22:06" (1/1) ... [2024-06-21 19:22:06,777 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 19:22:06,777 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 19:22:06,778 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 19:22:06,778 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 19:22:06,778 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:22:06" (1/1) ... [2024-06-21 19:22:06,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 19:22:06,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 19:22:06,822 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 19:22:06,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 19:22:06,854 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 19:22:06,855 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 19:22:06,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 19:22:06,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 19:22:06,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 19:22:06,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 19:22:06,856 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 19:22:06,856 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 19:22:06,856 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 19:22:06,856 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 19:22:06,857 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 19:22:06,857 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 19:22:06,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 19:22:06,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 19:22:06,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 19:22:06,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 19:22:06,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 19:22:06,860 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 19:22:07,044 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 19:22:07,047 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 19:22:07,989 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 19:22:07,990 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 19:22:10,465 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 19:22:10,465 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 19:22:10,466 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 07:22:10 BoogieIcfgContainer [2024-06-21 19:22:10,466 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 19:22:10,467 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 19:22:10,467 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 19:22:10,470 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 19:22:10,470 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:22:04" (1/4) ... [2024-06-21 19:22:10,471 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aeb33b2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 07:22:10, skipping insertion in model container [2024-06-21 19:22:10,471 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 07:22:05" (2/4) ... [2024-06-21 19:22:10,471 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aeb33b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 07:22:10, skipping insertion in model container [2024-06-21 19:22:10,471 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:22:06" (3/4) ... [2024-06-21 19:22:10,471 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aeb33b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 07:22:10, skipping insertion in model container [2024-06-21 19:22:10,471 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 07:22:10" (4/4) ... [2024-06-21 19:22:10,472 INFO L112 eAbstractionObserver]: Analyzing ICFG safe003_power.opt.i [2024-06-21 19:22:10,486 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 19:22:10,486 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 19:22:10,486 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 19:22:10,540 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 19:22:10,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 19:22:10,606 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-21 19:22:10,606 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 19:22:10,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 57 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 19:22:10,609 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 19:22:10,611 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-21 19:22:10,617 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 19:22:10,622 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;@20ad3513, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 19:22:10,623 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 19:22:10,628 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 19:22:10,628 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 19:22:10,628 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 19:22:10,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:22:10,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 19:22:10,629 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:22:10,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:22:10,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1897094882, now seen corresponding path program 1 times [2024-06-21 19:22:10,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:22:10,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18875665] [2024-06-21 19:22:10,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:22:10,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:22:10,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:22:16,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:22:16,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:22:16,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18875665] [2024-06-21 19:22:16,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18875665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:22:16,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:22:16,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 19:22:16,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796545245] [2024-06-21 19:22:16,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:22:16,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 19:22:16,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:22:16,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 19:22:16,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 19:22:16,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:22:16,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:16,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:22:16,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:22:16,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:22:17,211 INFO L124 PetriNetUnfolderBase]: 1217/1862 cut-off events. [2024-06-21 19:22:17,211 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-21 19:22:17,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3809 conditions, 1862 events. 1217/1862 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 8717 event pairs, 713 based on Foata normal form. 2/1817 useless extension candidates. Maximal degree in co-relation 3797. Up to 1843 conditions per place. [2024-06-21 19:22:17,225 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 36 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-21 19:22:17,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 46 transitions, 187 flow [2024-06-21 19:22:17,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 19:22:17,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 19:22:17,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-06-21 19:22:17,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-21 19:22:17,235 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 70 transitions. [2024-06-21 19:22:17,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 46 transitions, 187 flow [2024-06-21 19:22:17,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 46 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 19:22:17,242 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-21 19:22:17,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-21 19:22:17,245 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-21 19:22:17,246 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-21 19:22:17,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:17,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:22:17,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:22:17,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 19:22:17,247 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:22:17,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:22:17,247 INFO L85 PathProgramCache]: Analyzing trace with hash 2042117665, now seen corresponding path program 1 times [2024-06-21 19:22:17,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:22:17,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261385968] [2024-06-21 19:22:17,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:22:17,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:22:17,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:22:20,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:22:20,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:22:20,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261385968] [2024-06-21 19:22:20,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261385968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:22:20,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:22:20,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 19:22:20,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855357710] [2024-06-21 19:22:20,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:22:20,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 19:22:20,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:22:20,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 19:22:20,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 19:22:20,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 19:22:20,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:20,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:22:20,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 19:22:20,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:22:22,034 INFO L124 PetriNetUnfolderBase]: 1709/2563 cut-off events. [2024-06-21 19:22:22,034 INFO L125 PetriNetUnfolderBase]: For 386/386 co-relation queries the response was YES. [2024-06-21 19:22:22,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5867 conditions, 2563 events. 1709/2563 cut-off events. For 386/386 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11626 event pairs, 1050 based on Foata normal form. 3/2564 useless extension candidates. Maximal degree in co-relation 5855. Up to 2530 conditions per place. [2024-06-21 19:22:22,050 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 49 selfloop transitions, 7 changer transitions 0/60 dead transitions. [2024-06-21 19:22:22,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 60 transitions, 278 flow [2024-06-21 19:22:22,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 19:22:22,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 19:22:22,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 84 transitions. [2024-06-21 19:22:22,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 19:22:22,052 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 84 transitions. [2024-06-21 19:22:22,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 60 transitions, 278 flow [2024-06-21 19:22:22,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 60 transitions, 272 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 19:22:22,054 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 154 flow [2024-06-21 19:22:22,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2024-06-21 19:22:22,055 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2024-06-21 19:22:22,055 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 154 flow [2024-06-21 19:22:22,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:22,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:22:22,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:22:22,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 19:22:22,056 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:22:22,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:22:22,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1118859590, now seen corresponding path program 1 times [2024-06-21 19:22:22,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:22:22,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852613899] [2024-06-21 19:22:22,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:22:22,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:22:22,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:22:26,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:22:26,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:22:26,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852613899] [2024-06-21 19:22:26,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852613899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:22:26,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:22:26,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:22:26,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384299480] [2024-06-21 19:22:26,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:22:26,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:22:26,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:22:26,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:22:26,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:22:26,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 19:22:26,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:26,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:22:26,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 19:22:26,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:22:27,181 INFO L124 PetriNetUnfolderBase]: 1703/2554 cut-off events. [2024-06-21 19:22:27,182 INFO L125 PetriNetUnfolderBase]: For 1251/1251 co-relation queries the response was YES. [2024-06-21 19:22:27,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6489 conditions, 2554 events. 1703/2554 cut-off events. For 1251/1251 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11560 event pairs, 899 based on Foata normal form. 3/2555 useless extension candidates. Maximal degree in co-relation 6474. Up to 2502 conditions per place. [2024-06-21 19:22:27,193 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 58 selfloop transitions, 10 changer transitions 0/72 dead transitions. [2024-06-21 19:22:27,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 72 transitions, 368 flow [2024-06-21 19:22:27,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:22:27,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:22:27,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2024-06-21 19:22:27,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49047619047619045 [2024-06-21 19:22:27,195 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 154 flow. Second operand 5 states and 103 transitions. [2024-06-21 19:22:27,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 72 transitions, 368 flow [2024-06-21 19:22:27,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 72 transitions, 366 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-21 19:22:27,198 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 200 flow [2024-06-21 19:22:27,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2024-06-21 19:22:27,199 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-21 19:22:27,199 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 200 flow [2024-06-21 19:22:27,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:27,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:22:27,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:22:27,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 19:22:27,200 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:22:27,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:22:27,200 INFO L85 PathProgramCache]: Analyzing trace with hash -324906656, now seen corresponding path program 1 times [2024-06-21 19:22:27,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:22:27,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040221642] [2024-06-21 19:22:27,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:22:27,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:22:27,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:22:31,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:22:31,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:22:31,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040221642] [2024-06-21 19:22:31,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040221642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:22:31,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:22:31,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:22:31,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993199720] [2024-06-21 19:22:31,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:22:31,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:22:31,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:22:31,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:22:31,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:22:31,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:22:31,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 200 flow. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:31,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:22:31,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:22:31,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:22:32,892 INFO L124 PetriNetUnfolderBase]: 1697/2545 cut-off events. [2024-06-21 19:22:32,893 INFO L125 PetriNetUnfolderBase]: For 2277/2277 co-relation queries the response was YES. [2024-06-21 19:22:32,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7104 conditions, 2545 events. 1697/2545 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11520 event pairs, 748 based on Foata normal form. 3/2546 useless extension candidates. Maximal degree in co-relation 7085. Up to 2474 conditions per place. [2024-06-21 19:22:32,907 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 67 selfloop transitions, 14 changer transitions 0/84 dead transitions. [2024-06-21 19:22:32,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 84 transitions, 466 flow [2024-06-21 19:22:32,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:22:32,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:22:32,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 19:22:32,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-21 19:22:32,910 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 200 flow. Second operand 7 states and 123 transitions. [2024-06-21 19:22:32,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 84 transitions, 466 flow [2024-06-21 19:22:32,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 84 transitions, 444 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 19:22:32,918 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 238 flow [2024-06-21 19:22:32,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=238, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-06-21 19:22:32,919 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-21 19:22:32,919 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 238 flow [2024-06-21 19:22:32,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:32,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:22:32,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:22:32,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 19:22:32,920 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:22:32,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:22:32,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1482169447, now seen corresponding path program 1 times [2024-06-21 19:22:32,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:22:32,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683557070] [2024-06-21 19:22:32,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:22:32,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:22:33,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:22:37,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:22:37,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:22:37,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683557070] [2024-06-21 19:22:37,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683557070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:22:37,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:22:37,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:22:37,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135148033] [2024-06-21 19:22:37,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:22:37,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:22:37,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:22:37,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:22:37,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:22:37,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 19:22:37,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 238 flow. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:37,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:22:37,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 19:22:37,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:22:38,300 INFO L124 PetriNetUnfolderBase]: 1688/2530 cut-off events. [2024-06-21 19:22:38,300 INFO L125 PetriNetUnfolderBase]: For 3540/3540 co-relation queries the response was YES. [2024-06-21 19:22:38,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7627 conditions, 2530 events. 1688/2530 cut-off events. For 3540/3540 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11395 event pairs, 579 based on Foata normal form. 6/2534 useless extension candidates. Maximal degree in co-relation 7607. Up to 2421 conditions per place. [2024-06-21 19:22:38,312 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 72 selfloop transitions, 15 changer transitions 0/91 dead transitions. [2024-06-21 19:22:38,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 91 transitions, 522 flow [2024-06-21 19:22:38,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:22:38,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:22:38,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 19:22:38,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-21 19:22:38,318 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 238 flow. Second operand 7 states and 136 transitions. [2024-06-21 19:22:38,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 91 transitions, 522 flow [2024-06-21 19:22:38,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 91 transitions, 488 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 19:22:38,327 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 253 flow [2024-06-21 19:22:38,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=253, PETRI_PLACES=57, PETRI_TRANSITIONS=49} [2024-06-21 19:22:38,328 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-21 19:22:38,328 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 253 flow [2024-06-21 19:22:38,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:38,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:22:38,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:22:38,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 19:22:38,328 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:22:38,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:22:38,329 INFO L85 PathProgramCache]: Analyzing trace with hash -203612684, now seen corresponding path program 1 times [2024-06-21 19:22:38,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:22:38,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771490598] [2024-06-21 19:22:38,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:22:38,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:22:38,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:22:44,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:22:44,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:22:44,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771490598] [2024-06-21 19:22:44,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771490598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:22:44,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:22:44,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:22:44,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761562677] [2024-06-21 19:22:44,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:22:44,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:22:44,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:22:44,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:22:44,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:22:44,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:22:44,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 253 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:44,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:22:44,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:22:44,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:22:45,151 INFO L124 PetriNetUnfolderBase]: 1340/2089 cut-off events. [2024-06-21 19:22:45,151 INFO L125 PetriNetUnfolderBase]: For 4185/4233 co-relation queries the response was YES. [2024-06-21 19:22:45,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6558 conditions, 2089 events. 1340/2089 cut-off events. For 4185/4233 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 9974 event pairs, 506 based on Foata normal form. 4/2011 useless extension candidates. Maximal degree in co-relation 6537. Up to 1959 conditions per place. [2024-06-21 19:22:45,162 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 47 selfloop transitions, 12 changer transitions 0/69 dead transitions. [2024-06-21 19:22:45,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 69 transitions, 429 flow [2024-06-21 19:22:45,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:22:45,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:22:45,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-21 19:22:45,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-21 19:22:45,164 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 253 flow. Second operand 5 states and 92 transitions. [2024-06-21 19:22:45,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 69 transitions, 429 flow [2024-06-21 19:22:45,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 69 transitions, 386 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 19:22:45,167 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 278 flow [2024-06-21 19:22:45,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=278, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-06-21 19:22:45,167 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 15 predicate places. [2024-06-21 19:22:45,168 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 278 flow [2024-06-21 19:22:45,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:45,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:22:45,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:22:45,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 19:22:45,168 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:22:45,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:22:45,169 INFO L85 PathProgramCache]: Analyzing trace with hash -2057240647, now seen corresponding path program 1 times [2024-06-21 19:22:45,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:22:45,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423047592] [2024-06-21 19:22:45,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:22:45,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:22:45,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:22:50,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:22:50,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:22:50,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423047592] [2024-06-21 19:22:50,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423047592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:22:50,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:22:50,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:22:50,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225605540] [2024-06-21 19:22:50,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:22:50,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:22:50,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:22:50,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:22:50,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:22:50,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:22:50,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 278 flow. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:50,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:22:50,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:22:50,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:22:52,093 INFO L124 PetriNetUnfolderBase]: 1696/2547 cut-off events. [2024-06-21 19:22:52,094 INFO L125 PetriNetUnfolderBase]: For 6366/6376 co-relation queries the response was YES. [2024-06-21 19:22:52,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8573 conditions, 2547 events. 1696/2547 cut-off events. For 6366/6376 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11426 event pairs, 582 based on Foata normal form. 16/2560 useless extension candidates. Maximal degree in co-relation 8548. Up to 2400 conditions per place. [2024-06-21 19:22:52,105 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 66 selfloop transitions, 19 changer transitions 0/88 dead transitions. [2024-06-21 19:22:52,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 88 transitions, 589 flow [2024-06-21 19:22:52,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:22:52,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:22:52,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-21 19:22:52,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 19:22:52,107 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 278 flow. Second operand 6 states and 105 transitions. [2024-06-21 19:22:52,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 88 transitions, 589 flow [2024-06-21 19:22:52,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 88 transitions, 572 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-21 19:22:52,110 INFO L231 Difference]: Finished difference. Result has 64 places, 65 transitions, 396 flow [2024-06-21 19:22:52,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=396, PETRI_PLACES=64, PETRI_TRANSITIONS=65} [2024-06-21 19:22:52,111 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-21 19:22:52,111 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 65 transitions, 396 flow [2024-06-21 19:22:52,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:52,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:22:52,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:22:52,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 19:22:52,112 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:22:52,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:22:52,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1723290513, now seen corresponding path program 1 times [2024-06-21 19:22:52,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:22:52,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293870963] [2024-06-21 19:22:52,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:22:52,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:22:52,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:22:57,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:22:57,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:22:57,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293870963] [2024-06-21 19:22:57,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293870963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:22:57,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:22:57,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:22:57,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259093645] [2024-06-21 19:22:57,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:22:57,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:22:57,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:22:57,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:22:57,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:22:57,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:22:57,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 65 transitions, 396 flow. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:57,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:22:57,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:22:57,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:22:58,903 INFO L124 PetriNetUnfolderBase]: 1742/2615 cut-off events. [2024-06-21 19:22:58,903 INFO L125 PetriNetUnfolderBase]: For 8571/8571 co-relation queries the response was YES. [2024-06-21 19:22:58,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9851 conditions, 2615 events. 1742/2615 cut-off events. For 8571/8571 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11704 event pairs, 599 based on Foata normal form. 2/2614 useless extension candidates. Maximal degree in co-relation 9821. Up to 2429 conditions per place. [2024-06-21 19:22:58,916 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 80 selfloop transitions, 28 changer transitions 0/111 dead transitions. [2024-06-21 19:22:58,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 111 transitions, 840 flow [2024-06-21 19:22:58,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:22:58,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:22:58,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 19:22:58,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 19:22:58,918 INFO L175 Difference]: Start difference. First operand has 64 places, 65 transitions, 396 flow. Second operand 8 states and 137 transitions. [2024-06-21 19:22:58,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 111 transitions, 840 flow [2024-06-21 19:22:58,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 111 transitions, 822 flow, removed 9 selfloop flow, removed 0 redundant places. [2024-06-21 19:22:58,924 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 543 flow [2024-06-21 19:22:58,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=543, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2024-06-21 19:22:58,925 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-21 19:22:58,925 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 543 flow [2024-06-21 19:22:58,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:58,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:22:58,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:22:58,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 19:22:58,926 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:22:58,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:22:58,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1219970793, now seen corresponding path program 2 times [2024-06-21 19:22:58,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:22:58,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914495747] [2024-06-21 19:22:58,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:22:58,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:22:58,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:23:04,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:23:04,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:23:04,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914495747] [2024-06-21 19:23:04,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914495747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:23:04,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:23:04,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:23:04,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457006530] [2024-06-21 19:23:04,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:23:04,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:23:04,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:23:04,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:23:04,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:23:04,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:23:04,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 543 flow. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:04,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:23:04,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:23:04,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:23:06,289 INFO L124 PetriNetUnfolderBase]: 1727/2596 cut-off events. [2024-06-21 19:23:06,289 INFO L125 PetriNetUnfolderBase]: For 10278/10288 co-relation queries the response was YES. [2024-06-21 19:23:06,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10089 conditions, 2596 events. 1727/2596 cut-off events. For 10278/10288 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11646 event pairs, 606 based on Foata normal form. 14/2606 useless extension candidates. Maximal degree in co-relation 10054. Up to 2418 conditions per place. [2024-06-21 19:23:06,327 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 68 selfloop transitions, 26 changer transitions 0/97 dead transitions. [2024-06-21 19:23:06,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 97 transitions, 815 flow [2024-06-21 19:23:06,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:23:06,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:23:06,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-21 19:23:06,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 19:23:06,331 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 543 flow. Second operand 6 states and 105 transitions. [2024-06-21 19:23:06,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 97 transitions, 815 flow [2024-06-21 19:23:06,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 97 transitions, 762 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 19:23:06,345 INFO L231 Difference]: Finished difference. Result has 76 places, 75 transitions, 554 flow [2024-06-21 19:23:06,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=554, PETRI_PLACES=76, PETRI_TRANSITIONS=75} [2024-06-21 19:23:06,346 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-21 19:23:06,347 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 75 transitions, 554 flow [2024-06-21 19:23:06,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:06,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:23:06,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:23:06,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 19:23:06,347 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:23:06,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:23:06,348 INFO L85 PathProgramCache]: Analyzing trace with hash -79924907, now seen corresponding path program 3 times [2024-06-21 19:23:06,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:23:06,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712707878] [2024-06-21 19:23:06,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:23:06,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:23:06,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:23:11,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:23:11,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:23:11,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712707878] [2024-06-21 19:23:11,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712707878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:23:11,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:23:11,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:23:11,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028945010] [2024-06-21 19:23:11,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:23:11,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:23:11,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:23:11,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:23:11,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:23:11,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:23:11,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 554 flow. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:11,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:23:11,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:23:11,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:23:12,864 INFO L124 PetriNetUnfolderBase]: 1770/2665 cut-off events. [2024-06-21 19:23:12,865 INFO L125 PetriNetUnfolderBase]: For 12819/12825 co-relation queries the response was YES. [2024-06-21 19:23:12,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10576 conditions, 2665 events. 1770/2665 cut-off events. For 12819/12825 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12064 event pairs, 623 based on Foata normal form. 6/2664 useless extension candidates. Maximal degree in co-relation 10539. Up to 2447 conditions per place. [2024-06-21 19:23:12,877 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 75 selfloop transitions, 42 changer transitions 0/120 dead transitions. [2024-06-21 19:23:12,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 120 transitions, 1006 flow [2024-06-21 19:23:12,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:23:12,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:23:12,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 19:23:12,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-21 19:23:12,878 INFO L175 Difference]: Start difference. First operand has 76 places, 75 transitions, 554 flow. Second operand 7 states and 125 transitions. [2024-06-21 19:23:12,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 120 transitions, 1006 flow [2024-06-21 19:23:12,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 120 transitions, 912 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 19:23:12,888 INFO L231 Difference]: Finished difference. Result has 80 places, 90 transitions, 735 flow [2024-06-21 19:23:12,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=735, PETRI_PLACES=80, PETRI_TRANSITIONS=90} [2024-06-21 19:23:12,889 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-21 19:23:12,889 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 90 transitions, 735 flow [2024-06-21 19:23:12,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:12,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:23:12,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:23:12,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 19:23:12,890 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:23:12,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:23:12,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1335236850, now seen corresponding path program 1 times [2024-06-21 19:23:12,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:23:12,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936667362] [2024-06-21 19:23:12,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:23:12,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:23:12,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:23:20,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:23:20,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:23:20,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936667362] [2024-06-21 19:23:20,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936667362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:23:20,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:23:20,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:23:20,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731598179] [2024-06-21 19:23:20,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:23:20,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:23:20,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:23:20,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:23:20,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:23:20,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:23:20,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 90 transitions, 735 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:20,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:23:20,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:23:20,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:23:21,688 INFO L124 PetriNetUnfolderBase]: 1801/2709 cut-off events. [2024-06-21 19:23:21,688 INFO L125 PetriNetUnfolderBase]: For 15327/15327 co-relation queries the response was YES. [2024-06-21 19:23:21,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11144 conditions, 2709 events. 1801/2709 cut-off events. For 15327/15327 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12306 event pairs, 603 based on Foata normal form. 2/2706 useless extension candidates. Maximal degree in co-relation 11104. Up to 2442 conditions per place. [2024-06-21 19:23:21,698 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 89 selfloop transitions, 47 changer transitions 0/139 dead transitions. [2024-06-21 19:23:21,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 139 transitions, 1260 flow [2024-06-21 19:23:21,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:23:21,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:23:21,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 19:23:21,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 19:23:21,700 INFO L175 Difference]: Start difference. First operand has 80 places, 90 transitions, 735 flow. Second operand 7 states and 126 transitions. [2024-06-21 19:23:21,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 139 transitions, 1260 flow [2024-06-21 19:23:21,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 139 transitions, 1218 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 19:23:21,712 INFO L231 Difference]: Finished difference. Result has 86 places, 106 transitions, 982 flow [2024-06-21 19:23:21,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=982, PETRI_PLACES=86, PETRI_TRANSITIONS=106} [2024-06-21 19:23:21,713 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2024-06-21 19:23:21,713 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 106 transitions, 982 flow [2024-06-21 19:23:21,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:21,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:23:21,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:23:21,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 19:23:21,714 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:23:21,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:23:21,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1500582816, now seen corresponding path program 2 times [2024-06-21 19:23:21,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:23:21,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362915075] [2024-06-21 19:23:21,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:23:21,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:23:21,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:23:27,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:23:27,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:23:27,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362915075] [2024-06-21 19:23:27,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362915075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:23:27,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:23:27,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:23:27,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280568716] [2024-06-21 19:23:27,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:23:27,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:23:27,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:23:27,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:23:27,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:23:27,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:23:27,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 106 transitions, 982 flow. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:27,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:23:27,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:23:27,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:23:28,963 INFO L124 PetriNetUnfolderBase]: 1858/2793 cut-off events. [2024-06-21 19:23:28,963 INFO L125 PetriNetUnfolderBase]: For 19461/19467 co-relation queries the response was YES. [2024-06-21 19:23:28,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12456 conditions, 2793 events. 1858/2793 cut-off events. For 19461/19467 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12697 event pairs, 611 based on Foata normal form. 6/2790 useless extension candidates. Maximal degree in co-relation 12413. Up to 2438 conditions per place. [2024-06-21 19:23:28,978 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 84 selfloop transitions, 63 changer transitions 0/150 dead transitions. [2024-06-21 19:23:28,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 150 transitions, 1480 flow [2024-06-21 19:23:28,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:23:28,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:23:28,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 19:23:28,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-21 19:23:28,980 INFO L175 Difference]: Start difference. First operand has 86 places, 106 transitions, 982 flow. Second operand 9 states and 150 transitions. [2024-06-21 19:23:28,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 150 transitions, 1480 flow [2024-06-21 19:23:28,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 150 transitions, 1456 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-21 19:23:29,001 INFO L231 Difference]: Finished difference. Result has 95 places, 115 transitions, 1194 flow [2024-06-21 19:23:29,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=962, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1194, PETRI_PLACES=95, PETRI_TRANSITIONS=115} [2024-06-21 19:23:29,002 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-21 19:23:29,002 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 115 transitions, 1194 flow [2024-06-21 19:23:29,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:29,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:23:29,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:23:29,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 19:23:29,003 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:23:29,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:23:29,003 INFO L85 PathProgramCache]: Analyzing trace with hash -54344130, now seen corresponding path program 3 times [2024-06-21 19:23:29,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:23:29,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778970369] [2024-06-21 19:23:29,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:23:29,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:23:29,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:23:34,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:23:34,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:23:34,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778970369] [2024-06-21 19:23:34,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778970369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:23:34,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:23:34,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:23:34,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262775758] [2024-06-21 19:23:34,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:23:34,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:23:34,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:23:34,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:23:34,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:23:34,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:23:34,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 115 transitions, 1194 flow. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:34,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:23:34,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:23:34,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:23:36,109 INFO L124 PetriNetUnfolderBase]: 1892/2839 cut-off events. [2024-06-21 19:23:36,109 INFO L125 PetriNetUnfolderBase]: For 24387/24397 co-relation queries the response was YES. [2024-06-21 19:23:36,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13946 conditions, 2839 events. 1892/2839 cut-off events. For 24387/24397 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12902 event pairs, 591 based on Foata normal form. 16/2850 useless extension candidates. Maximal degree in co-relation 13899. Up to 2568 conditions per place. [2024-06-21 19:23:36,125 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 91 selfloop transitions, 54 changer transitions 0/148 dead transitions. [2024-06-21 19:23:36,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 148 transitions, 1646 flow [2024-06-21 19:23:36,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:23:36,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:23:36,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-21 19:23:36,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-21 19:23:36,128 INFO L175 Difference]: Start difference. First operand has 95 places, 115 transitions, 1194 flow. Second operand 8 states and 125 transitions. [2024-06-21 19:23:36,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 148 transitions, 1646 flow [2024-06-21 19:23:36,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 148 transitions, 1548 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 19:23:36,152 INFO L231 Difference]: Finished difference. Result has 98 places, 124 transitions, 1329 flow [2024-06-21 19:23:36,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1106, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1329, PETRI_PLACES=98, PETRI_TRANSITIONS=124} [2024-06-21 19:23:36,152 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-21 19:23:36,152 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 124 transitions, 1329 flow [2024-06-21 19:23:36,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:36,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:23:36,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:23:36,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 19:23:36,153 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:23:36,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:23:36,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1817298104, now seen corresponding path program 4 times [2024-06-21 19:23:36,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:23:36,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106583970] [2024-06-21 19:23:36,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:23:36,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:23:36,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:23:41,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:23:41,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:23:41,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106583970] [2024-06-21 19:23:41,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106583970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:23:41,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:23:41,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:23:41,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436973785] [2024-06-21 19:23:41,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:23:41,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:23:41,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:23:41,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:23:41,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:23:41,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:23:41,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 124 transitions, 1329 flow. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:41,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:23:41,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:23:41,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:23:42,959 INFO L124 PetriNetUnfolderBase]: 1896/2843 cut-off events. [2024-06-21 19:23:42,959 INFO L125 PetriNetUnfolderBase]: For 27028/27028 co-relation queries the response was YES. [2024-06-21 19:23:42,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14554 conditions, 2843 events. 1896/2843 cut-off events. For 27028/27028 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12882 event pairs, 580 based on Foata normal form. 2/2843 useless extension candidates. Maximal degree in co-relation 14506. Up to 2757 conditions per place. [2024-06-21 19:23:42,971 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 127 selfloop transitions, 30 changer transitions 0/160 dead transitions. [2024-06-21 19:23:42,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 160 transitions, 1759 flow [2024-06-21 19:23:42,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:23:42,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:23:42,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 19:23:42,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-21 19:23:42,974 INFO L175 Difference]: Start difference. First operand has 98 places, 124 transitions, 1329 flow. Second operand 8 states and 129 transitions. [2024-06-21 19:23:42,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 160 transitions, 1759 flow [2024-06-21 19:23:42,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 160 transitions, 1628 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 19:23:42,999 INFO L231 Difference]: Finished difference. Result has 101 places, 128 transitions, 1314 flow [2024-06-21 19:23:42,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1314, PETRI_PLACES=101, PETRI_TRANSITIONS=128} [2024-06-21 19:23:43,000 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-21 19:23:43,000 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 128 transitions, 1314 flow [2024-06-21 19:23:43,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:43,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:23:43,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:23:43,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 19:23:43,001 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:23:43,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:23:43,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1328556846, now seen corresponding path program 1 times [2024-06-21 19:23:43,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:23:43,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593299903] [2024-06-21 19:23:43,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:23:43,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:23:43,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:23:52,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:23:52,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:23:52,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593299903] [2024-06-21 19:23:52,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593299903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:23:52,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:23:52,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:23:52,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415107574] [2024-06-21 19:23:52,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:23:52,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:23:52,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:23:52,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:23:52,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:23:52,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:23:52,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 128 transitions, 1314 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:52,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:23:52,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:23:52,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:23:53,880 INFO L124 PetriNetUnfolderBase]: 1908/2865 cut-off events. [2024-06-21 19:23:53,880 INFO L125 PetriNetUnfolderBase]: For 30306/30313 co-relation queries the response was YES. [2024-06-21 19:23:53,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14685 conditions, 2865 events. 1908/2865 cut-off events. For 30306/30313 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 13018 event pairs, 551 based on Foata normal form. 14/2874 useless extension candidates. Maximal degree in co-relation 14635. Up to 2606 conditions per place. [2024-06-21 19:23:53,896 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 100 selfloop transitions, 52 changer transitions 0/155 dead transitions. [2024-06-21 19:23:53,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 155 transitions, 1714 flow [2024-06-21 19:23:53,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:23:53,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:23:53,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-21 19:23:53,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-21 19:23:53,899 INFO L175 Difference]: Start difference. First operand has 101 places, 128 transitions, 1314 flow. Second operand 8 states and 124 transitions. [2024-06-21 19:23:53,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 155 transitions, 1714 flow [2024-06-21 19:23:53,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 155 transitions, 1654 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 19:23:53,926 INFO L231 Difference]: Finished difference. Result has 104 places, 131 transitions, 1402 flow [2024-06-21 19:23:53,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1254, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1402, PETRI_PLACES=104, PETRI_TRANSITIONS=131} [2024-06-21 19:23:53,927 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-21 19:23:53,927 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 131 transitions, 1402 flow [2024-06-21 19:23:53,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:53,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:23:53,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:23:53,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 19:23:53,928 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:23:53,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:23:53,928 INFO L85 PathProgramCache]: Analyzing trace with hash 235134444, now seen corresponding path program 1 times [2024-06-21 19:23:53,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:23:53,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750169406] [2024-06-21 19:23:53,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:23:53,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:23:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:24:00,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:24:00,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:24:00,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750169406] [2024-06-21 19:24:00,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750169406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:24:00,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:24:00,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:24:00,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967455872] [2024-06-21 19:24:00,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:24:00,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:24:00,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:24:00,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:24:00,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:24:00,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:24:00,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 131 transitions, 1402 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:00,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:24:00,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:24:00,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:24:02,377 INFO L124 PetriNetUnfolderBase]: 1975/2965 cut-off events. [2024-06-21 19:24:02,377 INFO L125 PetriNetUnfolderBase]: For 34805/34813 co-relation queries the response was YES. [2024-06-21 19:24:02,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15813 conditions, 2965 events. 1975/2965 cut-off events. For 34805/34813 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 13549 event pairs, 587 based on Foata normal form. 8/2968 useless extension candidates. Maximal degree in co-relation 15762. Up to 2595 conditions per place. [2024-06-21 19:24:02,392 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 113 selfloop transitions, 65 changer transitions 0/181 dead transitions. [2024-06-21 19:24:02,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 181 transitions, 2018 flow [2024-06-21 19:24:02,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:24:02,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:24:02,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-21 19:24:02,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-21 19:24:02,394 INFO L175 Difference]: Start difference. First operand has 104 places, 131 transitions, 1402 flow. Second operand 7 states and 142 transitions. [2024-06-21 19:24:02,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 181 transitions, 2018 flow [2024-06-21 19:24:02,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 181 transitions, 1850 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 19:24:02,422 INFO L231 Difference]: Finished difference. Result has 104 places, 138 transitions, 1466 flow [2024-06-21 19:24:02,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1235, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1466, PETRI_PLACES=104, PETRI_TRANSITIONS=138} [2024-06-21 19:24:02,423 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-21 19:24:02,423 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 138 transitions, 1466 flow [2024-06-21 19:24:02,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:02,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:24:02,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:24:02,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 19:24:02,424 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:24:02,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:24:02,424 INFO L85 PathProgramCache]: Analyzing trace with hash 722857001, now seen corresponding path program 1 times [2024-06-21 19:24:02,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:24:02,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816954514] [2024-06-21 19:24:02,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:24:02,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:24:02,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:24:11,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:24:11,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:24:11,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816954514] [2024-06-21 19:24:11,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816954514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:24:11,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:24:11,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:24:11,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525100009] [2024-06-21 19:24:11,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:24:11,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:24:11,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:24:11,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:24:11,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:24:11,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:24:11,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 138 transitions, 1466 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:11,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:24:11,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:24:11,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:24:12,429 INFO L124 PetriNetUnfolderBase]: 2001/3006 cut-off events. [2024-06-21 19:24:12,429 INFO L125 PetriNetUnfolderBase]: For 40526/40557 co-relation queries the response was YES. [2024-06-21 19:24:12,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16634 conditions, 3006 events. 2001/3006 cut-off events. For 40526/40557 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 13852 event pairs, 566 based on Foata normal form. 26/3017 useless extension candidates. Maximal degree in co-relation 16584. Up to 2628 conditions per place. [2024-06-21 19:24:12,447 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 123 selfloop transitions, 52 changer transitions 0/178 dead transitions. [2024-06-21 19:24:12,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 178 transitions, 2083 flow [2024-06-21 19:24:12,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:24:12,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:24:12,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 19:24:12,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-21 19:24:12,450 INFO L175 Difference]: Start difference. First operand has 104 places, 138 transitions, 1466 flow. Second operand 7 states and 122 transitions. [2024-06-21 19:24:12,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 178 transitions, 2083 flow [2024-06-21 19:24:12,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 178 transitions, 2003 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-21 19:24:12,481 INFO L231 Difference]: Finished difference. Result has 110 places, 146 transitions, 1642 flow [2024-06-21 19:24:12,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1386, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1642, PETRI_PLACES=110, PETRI_TRANSITIONS=146} [2024-06-21 19:24:12,482 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-21 19:24:12,482 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 146 transitions, 1642 flow [2024-06-21 19:24:12,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:12,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:24:12,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:24:12,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 19:24:12,483 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:24:12,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:24:12,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1771567824, now seen corresponding path program 2 times [2024-06-21 19:24:12,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:24:12,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725459387] [2024-06-21 19:24:12,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:24:12,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:24:12,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:24:22,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:24:22,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:24:22,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725459387] [2024-06-21 19:24:22,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725459387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:24:22,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:24:22,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:24:22,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602712879] [2024-06-21 19:24:22,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:24:22,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:24:22,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:24:22,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:24:22,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:24:22,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:24:22,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 146 transitions, 1642 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:22,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:24:22,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:24:22,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:24:23,478 INFO L124 PetriNetUnfolderBase]: 1996/2996 cut-off events. [2024-06-21 19:24:23,478 INFO L125 PetriNetUnfolderBase]: For 44146/44154 co-relation queries the response was YES. [2024-06-21 19:24:23,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17357 conditions, 2996 events. 1996/2996 cut-off events. For 44146/44154 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 13713 event pairs, 562 based on Foata normal form. 8/2999 useless extension candidates. Maximal degree in co-relation 17304. Up to 2708 conditions per place. [2024-06-21 19:24:23,496 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 123 selfloop transitions, 59 changer transitions 0/185 dead transitions. [2024-06-21 19:24:23,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 185 transitions, 2151 flow [2024-06-21 19:24:23,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:24:23,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:24:23,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 19:24:23,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 19:24:23,500 INFO L175 Difference]: Start difference. First operand has 110 places, 146 transitions, 1642 flow. Second operand 8 states and 138 transitions. [2024-06-21 19:24:23,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 185 transitions, 2151 flow [2024-06-21 19:24:23,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 185 transitions, 2089 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 19:24:23,545 INFO L231 Difference]: Finished difference. Result has 115 places, 149 transitions, 1752 flow [2024-06-21 19:24:23,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1580, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1752, PETRI_PLACES=115, PETRI_TRANSITIONS=149} [2024-06-21 19:24:23,546 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 72 predicate places. [2024-06-21 19:24:23,546 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 149 transitions, 1752 flow [2024-06-21 19:24:23,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:23,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:24:23,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:24:23,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 19:24:23,547 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:24:23,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:24:23,547 INFO L85 PathProgramCache]: Analyzing trace with hash 726575916, now seen corresponding path program 3 times [2024-06-21 19:24:23,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:24:23,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217005899] [2024-06-21 19:24:23,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:24:23,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:24:23,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:24:30,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:24:30,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:24:30,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217005899] [2024-06-21 19:24:30,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217005899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:24:30,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:24:30,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:24:30,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119105010] [2024-06-21 19:24:30,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:24:30,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:24:30,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:24:30,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:24:30,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:24:30,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:24:30,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 149 transitions, 1752 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:30,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:24:30,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:24:30,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:24:31,304 INFO L124 PetriNetUnfolderBase]: 2009/3010 cut-off events. [2024-06-21 19:24:31,304 INFO L125 PetriNetUnfolderBase]: For 48260/48260 co-relation queries the response was YES. [2024-06-21 19:24:31,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18159 conditions, 3010 events. 2009/3010 cut-off events. For 48260/48260 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 13716 event pairs, 539 based on Foata normal form. 2/3010 useless extension candidates. Maximal degree in co-relation 18104. Up to 2874 conditions per place. [2024-06-21 19:24:31,337 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 141 selfloop transitions, 40 changer transitions 0/184 dead transitions. [2024-06-21 19:24:31,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 184 transitions, 2244 flow [2024-06-21 19:24:31,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:24:31,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:24:31,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 19:24:31,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-21 19:24:31,340 INFO L175 Difference]: Start difference. First operand has 115 places, 149 transitions, 1752 flow. Second operand 7 states and 121 transitions. [2024-06-21 19:24:31,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 184 transitions, 2244 flow [2024-06-21 19:24:31,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 184 transitions, 2096 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 19:24:31,388 INFO L231 Difference]: Finished difference. Result has 116 places, 152 transitions, 1737 flow [2024-06-21 19:24:31,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1604, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1737, PETRI_PLACES=116, PETRI_TRANSITIONS=152} [2024-06-21 19:24:31,389 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-21 19:24:31,389 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 152 transitions, 1737 flow [2024-06-21 19:24:31,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:31,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:24:31,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:24:31,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 19:24:31,390 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:24:31,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:24:31,391 INFO L85 PathProgramCache]: Analyzing trace with hash -4305195, now seen corresponding path program 2 times [2024-06-21 19:24:31,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:24:31,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864230679] [2024-06-21 19:24:31,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:24:31,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:24:31,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:24:36,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:24:36,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:24:36,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864230679] [2024-06-21 19:24:36,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864230679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:24:36,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:24:36,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:24:36,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51750062] [2024-06-21 19:24:36,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:24:36,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:24:36,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:24:36,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:24:36,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:24:37,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:24:37,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 152 transitions, 1737 flow. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:37,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:24:37,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:24:37,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:24:38,628 INFO L124 PetriNetUnfolderBase]: 2268/3388 cut-off events. [2024-06-21 19:24:38,628 INFO L125 PetriNetUnfolderBase]: For 60467/60474 co-relation queries the response was YES. [2024-06-21 19:24:38,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20705 conditions, 3388 events. 2268/3388 cut-off events. For 60467/60474 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 15820 event pairs, 544 based on Foata normal form. 12/3395 useless extension candidates. Maximal degree in co-relation 20649. Up to 2737 conditions per place. [2024-06-21 19:24:38,650 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 124 selfloop transitions, 92 changer transitions 0/219 dead transitions. [2024-06-21 19:24:38,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 219 transitions, 2778 flow [2024-06-21 19:24:38,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:24:38,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:24:38,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 19:24:38,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 19:24:38,652 INFO L175 Difference]: Start difference. First operand has 116 places, 152 transitions, 1737 flow. Second operand 9 states and 164 transitions. [2024-06-21 19:24:38,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 219 transitions, 2778 flow [2024-06-21 19:24:38,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 219 transitions, 2682 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 19:24:38,714 INFO L231 Difference]: Finished difference. Result has 123 places, 174 transitions, 2255 flow [2024-06-21 19:24:38,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1641, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2255, PETRI_PLACES=123, PETRI_TRANSITIONS=174} [2024-06-21 19:24:38,714 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-21 19:24:38,715 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 174 transitions, 2255 flow [2024-06-21 19:24:38,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:38,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:24:38,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:24:38,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 19:24:38,715 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:24:38,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:24:38,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1485702809, now seen corresponding path program 3 times [2024-06-21 19:24:38,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:24:38,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252792603] [2024-06-21 19:24:38,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:24:38,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:24:38,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:24:44,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:24:44,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:24:44,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252792603] [2024-06-21 19:24:44,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252792603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:24:44,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:24:44,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:24:44,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695489128] [2024-06-21 19:24:44,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:24:44,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:24:44,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:24:44,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:24:44,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:24:44,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:24:44,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 174 transitions, 2255 flow. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:44,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:24:44,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:24:44,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:24:45,885 INFO L124 PetriNetUnfolderBase]: 2255/3369 cut-off events. [2024-06-21 19:24:45,886 INFO L125 PetriNetUnfolderBase]: For 77759/77768 co-relation queries the response was YES. [2024-06-21 19:24:45,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23007 conditions, 3369 events. 2255/3369 cut-off events. For 77759/77768 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15600 event pairs, 614 based on Foata normal form. 12/3376 useless extension candidates. Maximal degree in co-relation 22947. Up to 3179 conditions per place. [2024-06-21 19:24:45,906 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 144 selfloop transitions, 46 changer transitions 0/193 dead transitions. [2024-06-21 19:24:45,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 193 transitions, 2569 flow [2024-06-21 19:24:45,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:24:45,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:24:45,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-21 19:24:45,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3630952380952381 [2024-06-21 19:24:45,908 INFO L175 Difference]: Start difference. First operand has 123 places, 174 transitions, 2255 flow. Second operand 8 states and 122 transitions. [2024-06-21 19:24:45,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 193 transitions, 2569 flow [2024-06-21 19:24:45,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 193 transitions, 2405 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-21 19:24:45,994 INFO L231 Difference]: Finished difference. Result has 128 places, 169 transitions, 2056 flow [2024-06-21 19:24:45,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1954, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2056, PETRI_PLACES=128, PETRI_TRANSITIONS=169} [2024-06-21 19:24:45,995 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2024-06-21 19:24:45,995 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 169 transitions, 2056 flow [2024-06-21 19:24:45,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:45,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:24:45,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:24:45,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 19:24:45,996 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:24:45,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:24:45,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1922685740, now seen corresponding path program 4 times [2024-06-21 19:24:45,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:24:45,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840150441] [2024-06-21 19:24:45,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:24:45,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:24:46,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:24:53,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:24:53,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:24:53,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840150441] [2024-06-21 19:24:53,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840150441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:24:53,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:24:53,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:24:53,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256978799] [2024-06-21 19:24:53,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:24:53,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:24:53,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:24:53,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:24:53,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:24:53,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:24:53,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 169 transitions, 2056 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:53,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:24:53,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:24:53,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:24:55,272 INFO L124 PetriNetUnfolderBase]: 2324/3468 cut-off events. [2024-06-21 19:24:55,272 INFO L125 PetriNetUnfolderBase]: For 84274/84283 co-relation queries the response was YES. [2024-06-21 19:24:55,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23839 conditions, 3468 events. 2324/3468 cut-off events. For 84274/84283 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16168 event pairs, 542 based on Foata normal form. 14/3477 useless extension candidates. Maximal degree in co-relation 23777. Up to 2820 conditions per place. [2024-06-21 19:24:55,292 INFO L140 encePairwiseOnDemand]: 25/42 looper letters, 126 selfloop transitions, 97 changer transitions 0/226 dead transitions. [2024-06-21 19:24:55,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 226 transitions, 2935 flow [2024-06-21 19:24:55,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:24:55,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:24:55,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 19:24:55,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-21 19:24:55,294 INFO L175 Difference]: Start difference. First operand has 128 places, 169 transitions, 2056 flow. Second operand 9 states and 158 transitions. [2024-06-21 19:24:55,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 226 transitions, 2935 flow [2024-06-21 19:24:55,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 226 transitions, 2842 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 19:24:55,373 INFO L231 Difference]: Finished difference. Result has 133 places, 185 transitions, 2415 flow [2024-06-21 19:24:55,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1963, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2415, PETRI_PLACES=133, PETRI_TRANSITIONS=185} [2024-06-21 19:24:55,374 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-21 19:24:55,374 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 185 transitions, 2415 flow [2024-06-21 19:24:55,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:55,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:24:55,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:24:55,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 19:24:55,375 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:24:55,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:24:55,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1138026179, now seen corresponding path program 1 times [2024-06-21 19:24:55,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:24:55,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500525062] [2024-06-21 19:24:55,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:24:55,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:24:55,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:25:02,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:25:02,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:25:02,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500525062] [2024-06-21 19:25:02,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500525062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:25:02,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:25:02,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:25:02,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660582021] [2024-06-21 19:25:02,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:25:02,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:25:02,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:25:02,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:25:02,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:25:02,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:25:02,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 185 transitions, 2415 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:02,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:25:02,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:25:02,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:25:04,312 INFO L124 PetriNetUnfolderBase]: 2496/3750 cut-off events. [2024-06-21 19:25:04,312 INFO L125 PetriNetUnfolderBase]: For 103277/103285 co-relation queries the response was YES. [2024-06-21 19:25:04,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27315 conditions, 3750 events. 2496/3750 cut-off events. For 103277/103285 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 17920 event pairs, 505 based on Foata normal form. 10/3755 useless extension candidates. Maximal degree in co-relation 27251. Up to 3063 conditions per place. [2024-06-21 19:25:04,333 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 166 selfloop transitions, 76 changer transitions 0/245 dead transitions. [2024-06-21 19:25:04,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 245 transitions, 3358 flow [2024-06-21 19:25:04,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:25:04,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:25:04,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-21 19:25:04,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-21 19:25:04,336 INFO L175 Difference]: Start difference. First operand has 133 places, 185 transitions, 2415 flow. Second operand 8 states and 163 transitions. [2024-06-21 19:25:04,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 245 transitions, 3358 flow [2024-06-21 19:25:04,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 245 transitions, 3304 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 19:25:04,418 INFO L231 Difference]: Finished difference. Result has 138 places, 189 transitions, 2608 flow [2024-06-21 19:25:04,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2361, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2608, PETRI_PLACES=138, PETRI_TRANSITIONS=189} [2024-06-21 19:25:04,418 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 95 predicate places. [2024-06-21 19:25:04,418 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 189 transitions, 2608 flow [2024-06-21 19:25:04,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:04,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:25:04,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:25:04,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 19:25:04,419 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:25:04,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:25:04,420 INFO L85 PathProgramCache]: Analyzing trace with hash -470750321, now seen corresponding path program 1 times [2024-06-21 19:25:04,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:25:04,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232101758] [2024-06-21 19:25:04,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:25:04,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:25:04,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:25:11,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:25:11,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:25:11,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232101758] [2024-06-21 19:25:11,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232101758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:25:11,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:25:11,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:25:11,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10391802] [2024-06-21 19:25:11,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:25:11,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:25:11,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:25:11,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:25:11,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:25:11,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:25:11,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 189 transitions, 2608 flow. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:11,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:25:11,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:25:11,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:25:13,283 INFO L124 PetriNetUnfolderBase]: 2558/3844 cut-off events. [2024-06-21 19:25:13,283 INFO L125 PetriNetUnfolderBase]: For 116550/116583 co-relation queries the response was YES. [2024-06-21 19:25:13,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28694 conditions, 3844 events. 2558/3844 cut-off events. For 116550/116583 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 18484 event pairs, 652 based on Foata normal form. 28/3857 useless extension candidates. Maximal degree in co-relation 28628. Up to 3363 conditions per place. [2024-06-21 19:25:13,311 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 166 selfloop transitions, 67 changer transitions 0/236 dead transitions. [2024-06-21 19:25:13,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 236 transitions, 3403 flow [2024-06-21 19:25:13,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:25:13,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:25:13,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 19:25:13,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-21 19:25:13,314 INFO L175 Difference]: Start difference. First operand has 138 places, 189 transitions, 2608 flow. Second operand 7 states and 136 transitions. [2024-06-21 19:25:13,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 236 transitions, 3403 flow [2024-06-21 19:25:13,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 236 transitions, 3264 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 19:25:13,448 INFO L231 Difference]: Finished difference. Result has 141 places, 195 transitions, 2717 flow [2024-06-21 19:25:13,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2469, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2717, PETRI_PLACES=141, PETRI_TRANSITIONS=195} [2024-06-21 19:25:13,448 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-21 19:25:13,449 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 195 transitions, 2717 flow [2024-06-21 19:25:13,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:13,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:25:13,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:25:13,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 19:25:13,449 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:25:13,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:25:13,450 INFO L85 PathProgramCache]: Analyzing trace with hash -918765827, now seen corresponding path program 2 times [2024-06-21 19:25:13,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:25:13,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576661752] [2024-06-21 19:25:13,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:25:13,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:25:13,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:25:20,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:25:20,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:25:20,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576661752] [2024-06-21 19:25:20,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576661752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:25:20,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:25:20,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:25:20,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846314362] [2024-06-21 19:25:20,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:25:20,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:25:20,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:25:20,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:25:20,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:25:20,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:25:20,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 195 transitions, 2717 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:20,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:25:20,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:25:20,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:25:22,019 INFO L124 PetriNetUnfolderBase]: 2578/3873 cut-off events. [2024-06-21 19:25:22,020 INFO L125 PetriNetUnfolderBase]: For 124171/124179 co-relation queries the response was YES. [2024-06-21 19:25:22,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29552 conditions, 3873 events. 2578/3873 cut-off events. For 124171/124179 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 18627 event pairs, 626 based on Foata normal form. 10/3878 useless extension candidates. Maximal degree in co-relation 29485. Up to 3488 conditions per place. [2024-06-21 19:25:22,044 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 172 selfloop transitions, 73 changer transitions 0/248 dead transitions. [2024-06-21 19:25:22,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 248 transitions, 3524 flow [2024-06-21 19:25:22,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:25:22,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:25:22,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 19:25:22,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 19:25:22,047 INFO L175 Difference]: Start difference. First operand has 141 places, 195 transitions, 2717 flow. Second operand 8 states and 156 transitions. [2024-06-21 19:25:22,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 248 transitions, 3524 flow [2024-06-21 19:25:22,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 248 transitions, 3409 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-21 19:25:22,185 INFO L231 Difference]: Finished difference. Result has 147 places, 200 transitions, 2860 flow [2024-06-21 19:25:22,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2602, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2860, PETRI_PLACES=147, PETRI_TRANSITIONS=200} [2024-06-21 19:25:22,186 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-06-21 19:25:22,186 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 200 transitions, 2860 flow [2024-06-21 19:25:22,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:22,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:25:22,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:25:22,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 19:25:22,186 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:25:22,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:25:22,187 INFO L85 PathProgramCache]: Analyzing trace with hash -248754033, now seen corresponding path program 3 times [2024-06-21 19:25:22,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:25:22,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847092425] [2024-06-21 19:25:22,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:25:22,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:25:22,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:25:31,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:25:31,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:25:31,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847092425] [2024-06-21 19:25:31,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847092425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:25:31,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:25:31,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:25:31,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442914902] [2024-06-21 19:25:31,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:25:31,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:25:31,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:25:31,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:25:31,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:25:31,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:25:31,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 200 transitions, 2860 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:31,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:25:31,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:25:31,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:25:33,200 INFO L124 PetriNetUnfolderBase]: 2570/3861 cut-off events. [2024-06-21 19:25:33,200 INFO L125 PetriNetUnfolderBase]: For 131067/131075 co-relation queries the response was YES. [2024-06-21 19:25:33,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30100 conditions, 3861 events. 2570/3861 cut-off events. For 131067/131075 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 18553 event pairs, 624 based on Foata normal form. 10/3866 useless extension candidates. Maximal degree in co-relation 30029. Up to 3540 conditions per place. [2024-06-21 19:25:33,231 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 178 selfloop transitions, 63 changer transitions 0/244 dead transitions. [2024-06-21 19:25:33,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 244 transitions, 3511 flow [2024-06-21 19:25:33,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:25:33,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:25:33,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 19:25:33,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 19:25:33,234 INFO L175 Difference]: Start difference. First operand has 147 places, 200 transitions, 2860 flow. Second operand 9 states and 153 transitions. [2024-06-21 19:25:33,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 244 transitions, 3511 flow [2024-06-21 19:25:33,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 244 transitions, 3312 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 19:25:33,396 INFO L231 Difference]: Finished difference. Result has 150 places, 202 transitions, 2846 flow [2024-06-21 19:25:33,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2661, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2846, PETRI_PLACES=150, PETRI_TRANSITIONS=202} [2024-06-21 19:25:33,396 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-21 19:25:33,397 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 202 transitions, 2846 flow [2024-06-21 19:25:33,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:33,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:25:33,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:25:33,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 19:25:33,397 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:25:33,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:25:33,398 INFO L85 PathProgramCache]: Analyzing trace with hash 933728857, now seen corresponding path program 2 times [2024-06-21 19:25:33,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:25:33,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857779221] [2024-06-21 19:25:33,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:25:33,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:25:33,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:25:42,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:25:42,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:25:42,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857779221] [2024-06-21 19:25:42,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857779221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:25:42,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:25:42,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:25:42,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932073965] [2024-06-21 19:25:42,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:25:42,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:25:42,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:25:42,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:25:42,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:25:42,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:25:42,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 202 transitions, 2846 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:42,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:25:42,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:25:42,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:25:44,543 INFO L124 PetriNetUnfolderBase]: 2614/3928 cut-off events. [2024-06-21 19:25:44,544 INFO L125 PetriNetUnfolderBase]: For 141659/141692 co-relation queries the response was YES. [2024-06-21 19:25:44,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30813 conditions, 3928 events. 2614/3928 cut-off events. For 141659/141692 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18981 event pairs, 628 based on Foata normal form. 28/3941 useless extension candidates. Maximal degree in co-relation 30741. Up to 3466 conditions per place. [2024-06-21 19:25:44,570 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 174 selfloop transitions, 69 changer transitions 0/246 dead transitions. [2024-06-21 19:25:44,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 246 transitions, 3691 flow [2024-06-21 19:25:44,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:25:44,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:25:44,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 19:25:44,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 19:25:44,573 INFO L175 Difference]: Start difference. First operand has 150 places, 202 transitions, 2846 flow. Second operand 8 states and 140 transitions. [2024-06-21 19:25:44,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 246 transitions, 3691 flow [2024-06-21 19:25:44,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 246 transitions, 3518 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 19:25:44,712 INFO L231 Difference]: Finished difference. Result has 151 places, 208 transitions, 2941 flow [2024-06-21 19:25:44,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2673, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2941, PETRI_PLACES=151, PETRI_TRANSITIONS=208} [2024-06-21 19:25:44,713 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 108 predicate places. [2024-06-21 19:25:44,713 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 208 transitions, 2941 flow [2024-06-21 19:25:44,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:44,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:25:44,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:25:44,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 19:25:44,714 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:25:44,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:25:44,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1297962557, now seen corresponding path program 3 times [2024-06-21 19:25:44,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:25:44,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153459511] [2024-06-21 19:25:44,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:25:44,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:25:44,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:25:55,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:25:55,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:25:55,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153459511] [2024-06-21 19:25:55,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153459511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:25:55,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:25:55,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:25:55,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085274194] [2024-06-21 19:25:55,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:25:55,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:25:55,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:25:55,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:25:55,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:25:55,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:25:55,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 208 transitions, 2941 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:55,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:25:55,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:25:55,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:25:56,905 INFO L124 PetriNetUnfolderBase]: 2604/3914 cut-off events. [2024-06-21 19:25:56,905 INFO L125 PetriNetUnfolderBase]: For 148672/148705 co-relation queries the response was YES. [2024-06-21 19:25:56,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31085 conditions, 3914 events. 2604/3914 cut-off events. For 148672/148705 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 18947 event pairs, 628 based on Foata normal form. 28/3927 useless extension candidates. Maximal degree in co-relation 31012. Up to 3491 conditions per place. [2024-06-21 19:25:56,934 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 176 selfloop transitions, 64 changer transitions 0/243 dead transitions. [2024-06-21 19:25:56,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 243 transitions, 3538 flow [2024-06-21 19:25:56,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:25:56,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:25:56,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 19:25:56,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 19:25:56,937 INFO L175 Difference]: Start difference. First operand has 151 places, 208 transitions, 2941 flow. Second operand 8 states and 135 transitions. [2024-06-21 19:25:56,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 243 transitions, 3538 flow [2024-06-21 19:25:57,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 243 transitions, 3377 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-21 19:25:57,091 INFO L231 Difference]: Finished difference. Result has 155 places, 208 transitions, 2916 flow [2024-06-21 19:25:57,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2780, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2916, PETRI_PLACES=155, PETRI_TRANSITIONS=208} [2024-06-21 19:25:57,104 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-21 19:25:57,105 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 208 transitions, 2916 flow [2024-06-21 19:25:57,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:57,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:25:57,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:25:57,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 19:25:57,105 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:25:57,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:25:57,106 INFO L85 PathProgramCache]: Analyzing trace with hash 86615455, now seen corresponding path program 1 times [2024-06-21 19:25:57,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:25:57,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789273704] [2024-06-21 19:25:57,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:25:57,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:25:57,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:26:03,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:26:04,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:26:04,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789273704] [2024-06-21 19:26:04,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789273704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:26:04,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:26:04,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:26:04,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442754087] [2024-06-21 19:26:04,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:26:04,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:26:04,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:26:04,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:26:04,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:26:04,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:26:04,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 208 transitions, 2916 flow. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:04,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:26:04,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:26:04,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:26:05,976 INFO L124 PetriNetUnfolderBase]: 2667/4000 cut-off events. [2024-06-21 19:26:05,977 INFO L125 PetriNetUnfolderBase]: For 156018/156027 co-relation queries the response was YES. [2024-06-21 19:26:05,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32186 conditions, 4000 events. 2667/4000 cut-off events. For 156018/156027 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 19348 event pairs, 540 based on Foata normal form. 10/4005 useless extension candidates. Maximal degree in co-relation 32111. Up to 3264 conditions per place. [2024-06-21 19:26:06,009 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 159 selfloop transitions, 104 changer transitions 0/266 dead transitions. [2024-06-21 19:26:06,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 266 transitions, 4003 flow [2024-06-21 19:26:06,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:26:06,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:26:06,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-21 19:26:06,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2024-06-21 19:26:06,012 INFO L175 Difference]: Start difference. First operand has 155 places, 208 transitions, 2916 flow. Second operand 10 states and 173 transitions. [2024-06-21 19:26:06,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 266 transitions, 4003 flow [2024-06-21 19:26:06,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 266 transitions, 3867 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 19:26:06,217 INFO L231 Difference]: Finished difference. Result has 160 places, 220 transitions, 3265 flow [2024-06-21 19:26:06,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2780, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3265, PETRI_PLACES=160, PETRI_TRANSITIONS=220} [2024-06-21 19:26:06,218 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-21 19:26:06,219 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 220 transitions, 3265 flow [2024-06-21 19:26:06,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:06,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:26:06,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:26:06,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 19:26:06,219 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:26:06,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:26:06,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1182498407, now seen corresponding path program 4 times [2024-06-21 19:26:06,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:26:06,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419718561] [2024-06-21 19:26:06,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:26:06,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:26:06,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:26:12,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:26:12,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:26:12,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419718561] [2024-06-21 19:26:12,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419718561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:26:12,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:26:12,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:26:12,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443910325] [2024-06-21 19:26:12,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:26:12,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:26:12,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:26:12,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:26:12,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:26:12,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:26:12,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 220 transitions, 3265 flow. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:12,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:26:12,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:26:12,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:26:14,511 INFO L124 PetriNetUnfolderBase]: 2680/4018 cut-off events. [2024-06-21 19:26:14,511 INFO L125 PetriNetUnfolderBase]: For 170790/170797 co-relation queries the response was YES. [2024-06-21 19:26:14,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33901 conditions, 4018 events. 2680/4018 cut-off events. For 170790/170797 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 19378 event pairs, 615 based on Foata normal form. 8/4021 useless extension candidates. Maximal degree in co-relation 33823. Up to 3828 conditions per place. [2024-06-21 19:26:14,539 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 205 selfloop transitions, 44 changer transitions 0/252 dead transitions. [2024-06-21 19:26:14,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 252 transitions, 3892 flow [2024-06-21 19:26:14,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:26:14,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:26:14,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 19:26:14,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-21 19:26:14,541 INFO L175 Difference]: Start difference. First operand has 160 places, 220 transitions, 3265 flow. Second operand 7 states and 121 transitions. [2024-06-21 19:26:14,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 252 transitions, 3892 flow [2024-06-21 19:26:14,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 252 transitions, 3785 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 19:26:14,734 INFO L231 Difference]: Finished difference. Result has 161 places, 223 transitions, 3304 flow [2024-06-21 19:26:14,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3158, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3304, PETRI_PLACES=161, PETRI_TRANSITIONS=223} [2024-06-21 19:26:14,735 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-21 19:26:14,735 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 223 transitions, 3304 flow [2024-06-21 19:26:14,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:14,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:26:14,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:26:14,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 19:26:14,736 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:26:14,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:26:14,736 INFO L85 PathProgramCache]: Analyzing trace with hash -800678023, now seen corresponding path program 5 times [2024-06-21 19:26:14,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:26:14,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450551469] [2024-06-21 19:26:14,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:26:14,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:26:14,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:26:21,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:26:21,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:26:21,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450551469] [2024-06-21 19:26:21,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450551469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:26:21,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:26:21,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:26:21,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610104727] [2024-06-21 19:26:21,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:26:21,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:26:21,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:26:21,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:26:21,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:26:21,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:26:21,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 223 transitions, 3304 flow. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:21,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:26:21,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:26:21,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:26:23,675 INFO L124 PetriNetUnfolderBase]: 2706/4057 cut-off events. [2024-06-21 19:26:23,676 INFO L125 PetriNetUnfolderBase]: For 171734/171741 co-relation queries the response was YES. [2024-06-21 19:26:23,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34253 conditions, 4057 events. 2706/4057 cut-off events. For 171734/171741 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 19571 event pairs, 619 based on Foata normal form. 10/4062 useless extension candidates. Maximal degree in co-relation 34175. Up to 3477 conditions per place. [2024-06-21 19:26:23,709 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 164 selfloop transitions, 94 changer transitions 0/261 dead transitions. [2024-06-21 19:26:23,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 261 transitions, 4166 flow [2024-06-21 19:26:23,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:26:23,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:26:23,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 19:26:23,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-21 19:26:23,713 INFO L175 Difference]: Start difference. First operand has 161 places, 223 transitions, 3304 flow. Second operand 9 states and 142 transitions. [2024-06-21 19:26:23,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 261 transitions, 4166 flow [2024-06-21 19:26:23,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 261 transitions, 4023 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 19:26:23,937 INFO L231 Difference]: Finished difference. Result has 166 places, 229 transitions, 3513 flow [2024-06-21 19:26:23,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3161, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3513, PETRI_PLACES=166, PETRI_TRANSITIONS=229} [2024-06-21 19:26:23,938 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-21 19:26:23,938 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 229 transitions, 3513 flow [2024-06-21 19:26:23,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:23,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:26:23,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:26:23,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 19:26:23,939 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:26:23,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:26:23,939 INFO L85 PathProgramCache]: Analyzing trace with hash -800678147, now seen corresponding path program 4 times [2024-06-21 19:26:23,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:26:23,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329964671] [2024-06-21 19:26:23,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:26:23,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:26:24,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:26:31,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:26:31,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:26:31,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329964671] [2024-06-21 19:26:31,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329964671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:26:31,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:26:31,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:26:31,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127201039] [2024-06-21 19:26:31,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:26:31,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:26:31,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:26:31,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:26:31,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:26:31,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:26:31,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 229 transitions, 3513 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:31,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:26:31,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:26:31,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:26:33,308 INFO L124 PetriNetUnfolderBase]: 2726/4087 cut-off events. [2024-06-21 19:26:33,308 INFO L125 PetriNetUnfolderBase]: For 183809/183809 co-relation queries the response was YES. [2024-06-21 19:26:33,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35317 conditions, 4087 events. 2726/4087 cut-off events. For 183809/183809 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 19726 event pairs, 614 based on Foata normal form. 4/4089 useless extension candidates. Maximal degree in co-relation 35236. Up to 3862 conditions per place. [2024-06-21 19:26:33,341 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 217 selfloop transitions, 57 changer transitions 0/277 dead transitions. [2024-06-21 19:26:33,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 277 transitions, 4344 flow [2024-06-21 19:26:33,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:26:33,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:26:33,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 19:26:33,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-21 19:26:33,344 INFO L175 Difference]: Start difference. First operand has 166 places, 229 transitions, 3513 flow. Second operand 9 states and 150 transitions. [2024-06-21 19:26:33,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 277 transitions, 4344 flow [2024-06-21 19:26:33,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 277 transitions, 4142 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 19:26:33,611 INFO L231 Difference]: Finished difference. Result has 170 places, 234 transitions, 3578 flow [2024-06-21 19:26:33,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3311, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3578, PETRI_PLACES=170, PETRI_TRANSITIONS=234} [2024-06-21 19:26:33,612 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-21 19:26:33,612 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 234 transitions, 3578 flow [2024-06-21 19:26:33,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:33,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:26:33,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:26:33,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 19:26:33,612 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:26:33,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:26:33,613 INFO L85 PathProgramCache]: Analyzing trace with hash -133458089, now seen corresponding path program 6 times [2024-06-21 19:26:33,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:26:33,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37198669] [2024-06-21 19:26:33,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:26:33,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:26:33,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:26:40,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:26:40,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:26:40,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37198669] [2024-06-21 19:26:40,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37198669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:26:40,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:26:40,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:26:40,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637710015] [2024-06-21 19:26:40,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:26:40,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:26:40,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:26:40,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:26:40,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:26:40,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:26:40,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 234 transitions, 3578 flow. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:40,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:26:40,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:26:40,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:26:42,498 INFO L124 PetriNetUnfolderBase]: 2734/4101 cut-off events. [2024-06-21 19:26:42,499 INFO L125 PetriNetUnfolderBase]: For 193195/193202 co-relation queries the response was YES. [2024-06-21 19:26:42,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35620 conditions, 4101 events. 2734/4101 cut-off events. For 193195/193202 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 19821 event pairs, 619 based on Foata normal form. 10/4106 useless extension candidates. Maximal degree in co-relation 35537. Up to 3715 conditions per place. [2024-06-21 19:26:42,528 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 191 selfloop transitions, 72 changer transitions 0/266 dead transitions. [2024-06-21 19:26:42,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 266 transitions, 4248 flow [2024-06-21 19:26:42,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:26:42,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:26:42,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 19:26:42,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-21 19:26:42,531 INFO L175 Difference]: Start difference. First operand has 170 places, 234 transitions, 3578 flow. Second operand 8 states and 130 transitions. [2024-06-21 19:26:42,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 266 transitions, 4248 flow [2024-06-21 19:26:42,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 266 transitions, 4139 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 19:26:42,759 INFO L231 Difference]: Finished difference. Result has 172 places, 237 transitions, 3683 flow [2024-06-21 19:26:42,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3469, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3683, PETRI_PLACES=172, PETRI_TRANSITIONS=237} [2024-06-21 19:26:42,759 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 129 predicate places. [2024-06-21 19:26:42,760 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 237 transitions, 3683 flow [2024-06-21 19:26:42,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:42,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:26:42,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:26:42,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 19:26:42,760 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:26:42,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:26:42,761 INFO L85 PathProgramCache]: Analyzing trace with hash -526281217, now seen corresponding path program 5 times [2024-06-21 19:26:42,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:26:42,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369154368] [2024-06-21 19:26:42,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:26:42,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:26:42,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:26:49,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:26:49,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:26:49,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369154368] [2024-06-21 19:26:49,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369154368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:26:49,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:26:49,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:26:49,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166079029] [2024-06-21 19:26:49,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:26:49,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:26:49,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:26:49,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:26:49,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:26:49,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:26:49,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 237 transitions, 3683 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:49,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:26:49,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:26:49,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:26:51,481 INFO L124 PetriNetUnfolderBase]: 2718/4077 cut-off events. [2024-06-21 19:26:51,481 INFO L125 PetriNetUnfolderBase]: For 200506/200513 co-relation queries the response was YES. [2024-06-21 19:26:51,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35551 conditions, 4077 events. 2718/4077 cut-off events. For 200506/200513 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 19689 event pairs, 605 based on Foata normal form. 14/4086 useless extension candidates. Maximal degree in co-relation 35467. Up to 3812 conditions per place. [2024-06-21 19:26:51,514 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 226 selfloop transitions, 45 changer transitions 0/274 dead transitions. [2024-06-21 19:26:51,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 274 transitions, 4373 flow [2024-06-21 19:26:51,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:26:51,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:26:51,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 19:26:51,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 19:26:51,517 INFO L175 Difference]: Start difference. First operand has 172 places, 237 transitions, 3683 flow. Second operand 8 states and 138 transitions. [2024-06-21 19:26:51,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 274 transitions, 4373 flow [2024-06-21 19:26:51,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 274 transitions, 4241 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 19:26:51,760 INFO L231 Difference]: Finished difference. Result has 175 places, 239 transitions, 3697 flow [2024-06-21 19:26:51,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3551, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3697, PETRI_PLACES=175, PETRI_TRANSITIONS=239} [2024-06-21 19:26:51,761 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 132 predicate places. [2024-06-21 19:26:51,761 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 239 transitions, 3697 flow [2024-06-21 19:26:51,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:51,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:26:51,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:26:51,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 19:26:51,761 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:26:51,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:26:51,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1137750447, now seen corresponding path program 1 times [2024-06-21 19:26:51,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:26:51,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106843031] [2024-06-21 19:26:51,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:26:51,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:26:51,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:26:59,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:26:59,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:26:59,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106843031] [2024-06-21 19:26:59,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106843031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:26:59,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:26:59,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:26:59,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603452417] [2024-06-21 19:26:59,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:26:59,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:26:59,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:26:59,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:26:59,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:26:59,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:26:59,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 239 transitions, 3697 flow. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:59,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:26:59,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:26:59,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:27:01,110 INFO L124 PetriNetUnfolderBase]: 2738/4109 cut-off events. [2024-06-21 19:27:01,110 INFO L125 PetriNetUnfolderBase]: For 208362/208369 co-relation queries the response was YES. [2024-06-21 19:27:01,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36152 conditions, 4109 events. 2738/4109 cut-off events. For 208362/208369 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 19893 event pairs, 556 based on Foata normal form. 10/4114 useless extension candidates. Maximal degree in co-relation 36068. Up to 3790 conditions per place. [2024-06-21 19:27:01,143 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 220 selfloop transitions, 47 changer transitions 0/270 dead transitions. [2024-06-21 19:27:01,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 270 transitions, 4553 flow [2024-06-21 19:27:01,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:27:01,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:27:01,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-21 19:27:01,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-21 19:27:01,149 INFO L175 Difference]: Start difference. First operand has 175 places, 239 transitions, 3697 flow. Second operand 8 states and 124 transitions. [2024-06-21 19:27:01,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 270 transitions, 4553 flow [2024-06-21 19:27:01,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 270 transitions, 4419 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 19:27:01,382 INFO L231 Difference]: Finished difference. Result has 179 places, 243 transitions, 3778 flow [2024-06-21 19:27:01,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3563, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3778, PETRI_PLACES=179, PETRI_TRANSITIONS=243} [2024-06-21 19:27:01,382 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 136 predicate places. [2024-06-21 19:27:01,383 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 243 transitions, 3778 flow [2024-06-21 19:27:01,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:01,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:27:01,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:27:01,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 19:27:01,383 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:27:01,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:27:01,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1367966367, now seen corresponding path program 2 times [2024-06-21 19:27:01,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:27:01,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780710141] [2024-06-21 19:27:01,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:27:01,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:27:01,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:27:10,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:27:10,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:27:10,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780710141] [2024-06-21 19:27:10,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780710141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:27:10,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:27:10,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:27:10,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116756365] [2024-06-21 19:27:10,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:27:10,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:27:10,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:27:10,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:27:10,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:27:10,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:27:10,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 243 transitions, 3778 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:10,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:27:10,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:27:10,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:27:12,395 INFO L124 PetriNetUnfolderBase]: 2730/4097 cut-off events. [2024-06-21 19:27:12,396 INFO L125 PetriNetUnfolderBase]: For 215556/215563 co-relation queries the response was YES. [2024-06-21 19:27:12,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36113 conditions, 4097 events. 2730/4097 cut-off events. For 215556/215563 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 19851 event pairs, 613 based on Foata normal form. 10/4102 useless extension candidates. Maximal degree in co-relation 36027. Up to 3856 conditions per place. [2024-06-21 19:27:12,428 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 217 selfloop transitions, 47 changer transitions 0/267 dead transitions. [2024-06-21 19:27:12,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 267 transitions, 4375 flow [2024-06-21 19:27:12,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:27:12,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:27:12,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 19:27:12,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-21 19:27:12,431 INFO L175 Difference]: Start difference. First operand has 179 places, 243 transitions, 3778 flow. Second operand 7 states and 117 transitions. [2024-06-21 19:27:12,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 267 transitions, 4375 flow [2024-06-21 19:27:12,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 267 transitions, 4246 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-21 19:27:12,685 INFO L231 Difference]: Finished difference. Result has 182 places, 243 transitions, 3751 flow [2024-06-21 19:27:12,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3649, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3751, PETRI_PLACES=182, PETRI_TRANSITIONS=243} [2024-06-21 19:27:12,686 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-21 19:27:12,686 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 243 transitions, 3751 flow [2024-06-21 19:27:12,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:12,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:27:12,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:27:12,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 19:27:12,687 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:27:12,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:27:12,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1670844246, now seen corresponding path program 1 times [2024-06-21 19:27:12,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:27:12,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328134747] [2024-06-21 19:27:12,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:27:12,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:27:12,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:27:20,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:27:20,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:27:20,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328134747] [2024-06-21 19:27:20,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328134747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:27:20,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:27:20,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:27:20,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769143841] [2024-06-21 19:27:20,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:27:20,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:27:20,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:27:20,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:27:20,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:27:20,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:27:20,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 243 transitions, 3751 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:20,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:27:20,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:27:20,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:27:22,675 INFO L124 PetriNetUnfolderBase]: 3018/4583 cut-off events. [2024-06-21 19:27:22,676 INFO L125 PetriNetUnfolderBase]: For 270221/270252 co-relation queries the response was YES. [2024-06-21 19:27:22,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40776 conditions, 4583 events. 3018/4583 cut-off events. For 270221/270252 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 23379 event pairs, 613 based on Foata normal form. 38/4606 useless extension candidates. Maximal degree in co-relation 40688. Up to 3362 conditions per place. [2024-06-21 19:27:22,710 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 214 selfloop transitions, 86 changer transitions 0/303 dead transitions. [2024-06-21 19:27:22,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 303 transitions, 5000 flow [2024-06-21 19:27:22,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:27:22,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:27:22,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 19:27:22,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 19:27:22,713 INFO L175 Difference]: Start difference. First operand has 182 places, 243 transitions, 3751 flow. Second operand 9 states and 164 transitions. [2024-06-21 19:27:22,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 303 transitions, 5000 flow [2024-06-21 19:27:22,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 303 transitions, 4913 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 19:27:22,993 INFO L231 Difference]: Finished difference. Result has 187 places, 246 transitions, 3980 flow [2024-06-21 19:27:22,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3664, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3980, PETRI_PLACES=187, PETRI_TRANSITIONS=246} [2024-06-21 19:27:22,994 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-21 19:27:22,994 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 246 transitions, 3980 flow [2024-06-21 19:27:22,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:22,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:27:22,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:27:22,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 19:27:22,995 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:27:22,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:27:22,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1668970296, now seen corresponding path program 2 times [2024-06-21 19:27:22,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:27:22,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960408878] [2024-06-21 19:27:22,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:27:22,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:27:23,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:27:30,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:27:30,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:27:30,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960408878] [2024-06-21 19:27:30,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960408878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:27:30,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:27:30,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:27:30,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819131623] [2024-06-21 19:27:30,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:27:30,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:27:30,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:27:30,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:27:30,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:27:30,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:27:30,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 246 transitions, 3980 flow. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:30,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:27:30,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:27:30,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:27:33,206 INFO L124 PetriNetUnfolderBase]: 3228/4929 cut-off events. [2024-06-21 19:27:33,207 INFO L125 PetriNetUnfolderBase]: For 307790/307821 co-relation queries the response was YES. [2024-06-21 19:27:33,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44746 conditions, 4929 events. 3228/4929 cut-off events. For 307790/307821 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 25831 event pairs, 765 based on Foata normal form. 38/4952 useless extension candidates. Maximal degree in co-relation 44656. Up to 4017 conditions per place. [2024-06-21 19:27:33,250 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 215 selfloop transitions, 90 changer transitions 0/308 dead transitions. [2024-06-21 19:27:33,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 308 transitions, 5285 flow [2024-06-21 19:27:33,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:27:33,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:27:33,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 19:27:33,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 19:27:33,255 INFO L175 Difference]: Start difference. First operand has 187 places, 246 transitions, 3980 flow. Second operand 8 states and 160 transitions. [2024-06-21 19:27:33,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 308 transitions, 5285 flow [2024-06-21 19:27:33,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 308 transitions, 5161 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 19:27:33,762 INFO L231 Difference]: Finished difference. Result has 191 places, 251 transitions, 4227 flow [2024-06-21 19:27:33,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3860, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4227, PETRI_PLACES=191, PETRI_TRANSITIONS=251} [2024-06-21 19:27:33,763 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-21 19:27:33,763 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 251 transitions, 4227 flow [2024-06-21 19:27:33,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:33,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:27:33,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:27:33,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 19:27:33,764 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:27:33,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:27:33,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1668966576, now seen corresponding path program 3 times [2024-06-21 19:27:33,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:27:33,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015914409] [2024-06-21 19:27:33,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:27:33,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:27:33,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:27:40,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:27:40,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:27:40,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015914409] [2024-06-21 19:27:40,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015914409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:27:40,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:27:40,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:27:40,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088851252] [2024-06-21 19:27:40,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:27:40,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:27:40,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:27:40,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:27:40,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:27:40,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:27:40,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 251 transitions, 4227 flow. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:40,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:27:40,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:27:40,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:27:43,251 INFO L124 PetriNetUnfolderBase]: 3220/4917 cut-off events. [2024-06-21 19:27:43,252 INFO L125 PetriNetUnfolderBase]: For 309130/309161 co-relation queries the response was YES. [2024-06-21 19:27:43,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45206 conditions, 4917 events. 3220/4917 cut-off events. For 309130/309161 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 25760 event pairs, 791 based on Foata normal form. 26/4928 useless extension candidates. Maximal degree in co-relation 45114. Up to 4443 conditions per place. [2024-06-21 19:27:43,290 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 227 selfloop transitions, 74 changer transitions 0/304 dead transitions. [2024-06-21 19:27:43,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 304 transitions, 5122 flow [2024-06-21 19:27:43,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:27:43,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:27:43,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 19:27:43,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 19:27:43,293 INFO L175 Difference]: Start difference. First operand has 191 places, 251 transitions, 4227 flow. Second operand 8 states and 146 transitions. [2024-06-21 19:27:43,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 304 transitions, 5122 flow [2024-06-21 19:27:43,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 304 transitions, 5033 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 19:27:43,703 INFO L231 Difference]: Finished difference. Result has 198 places, 261 transitions, 4506 flow [2024-06-21 19:27:43,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4140, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4506, PETRI_PLACES=198, PETRI_TRANSITIONS=261} [2024-06-21 19:27:43,704 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-21 19:27:43,704 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 261 transitions, 4506 flow [2024-06-21 19:27:43,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:43,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:27:43,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:27:43,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 19:27:43,704 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:27:43,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:27:43,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1582278486, now seen corresponding path program 4 times [2024-06-21 19:27:43,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:27:43,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205780712] [2024-06-21 19:27:43,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:27:43,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:27:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:27:55,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:27:55,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:27:55,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205780712] [2024-06-21 19:27:55,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205780712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:27:55,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:27:55,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:27:55,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402843874] [2024-06-21 19:27:55,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:27:55,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:27:55,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:27:55,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:27:55,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:27:55,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:27:55,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 261 transitions, 4506 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:55,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:27:55,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:27:55,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:27:57,920 INFO L124 PetriNetUnfolderBase]: 3384/5193 cut-off events. [2024-06-21 19:27:57,920 INFO L125 PetriNetUnfolderBase]: For 350971/351002 co-relation queries the response was YES. [2024-06-21 19:27:57,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48537 conditions, 5193 events. 3384/5193 cut-off events. For 350971/351002 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 27825 event pairs, 766 based on Foata normal form. 38/5216 useless extension candidates. Maximal degree in co-relation 48441. Up to 4438 conditions per place. [2024-06-21 19:27:58,059 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 243 selfloop transitions, 68 changer transitions 0/314 dead transitions. [2024-06-21 19:27:58,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 314 transitions, 5617 flow [2024-06-21 19:27:58,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:27:58,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:27:58,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 19:27:58,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-21 19:27:58,062 INFO L175 Difference]: Start difference. First operand has 198 places, 261 transitions, 4506 flow. Second operand 9 states and 158 transitions. [2024-06-21 19:27:58,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 314 transitions, 5617 flow [2024-06-21 19:27:58,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 314 transitions, 5472 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-21 19:27:58,463 INFO L231 Difference]: Finished difference. Result has 204 places, 263 transitions, 4589 flow [2024-06-21 19:27:58,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4361, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4589, PETRI_PLACES=204, PETRI_TRANSITIONS=263} [2024-06-21 19:27:58,464 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-21 19:27:58,464 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 263 transitions, 4589 flow [2024-06-21 19:27:58,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:58,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:27:58,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:27:58,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 19:27:58,465 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:27:58,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:27:58,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1582274766, now seen corresponding path program 5 times [2024-06-21 19:27:58,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:27:58,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785582377] [2024-06-21 19:27:58,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:27:58,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:27:58,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:28:08,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:28:08,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:28:08,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785582377] [2024-06-21 19:28:08,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785582377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:28:08,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:28:08,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:28:08,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193584194] [2024-06-21 19:28:08,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:28:08,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:28:08,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:28:08,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:28:08,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:28:08,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:28:08,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 263 transitions, 4589 flow. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:28:08,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:28:08,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:28:08,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:28:10,201 INFO L124 PetriNetUnfolderBase]: 3472/5341 cut-off events. [2024-06-21 19:28:10,201 INFO L125 PetriNetUnfolderBase]: For 374236/374267 co-relation queries the response was YES. [2024-06-21 19:28:10,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50017 conditions, 5341 events. 3472/5341 cut-off events. For 374236/374267 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 28966 event pairs, 798 based on Foata normal form. 42/5368 useless extension candidates. Maximal degree in co-relation 49918. Up to 4739 conditions per place. [2024-06-21 19:28:10,245 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 238 selfloop transitions, 69 changer transitions 0/310 dead transitions. [2024-06-21 19:28:10,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 310 transitions, 5462 flow [2024-06-21 19:28:10,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:28:10,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:28:10,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 19:28:10,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-21 19:28:10,248 INFO L175 Difference]: Start difference. First operand has 204 places, 263 transitions, 4589 flow. Second operand 8 states and 149 transitions. [2024-06-21 19:28:10,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 310 transitions, 5462 flow [2024-06-21 19:28:10,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 310 transitions, 5313 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-21 19:28:10,662 INFO L231 Difference]: Finished difference. Result has 207 places, 264 transitions, 4631 flow [2024-06-21 19:28:10,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4446, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4631, PETRI_PLACES=207, PETRI_TRANSITIONS=264} [2024-06-21 19:28:10,663 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-21 19:28:10,663 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 264 transitions, 4631 flow [2024-06-21 19:28:10,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:28:10,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:28:10,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:28:10,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 19:28:10,663 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:28:10,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:28:10,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1669873226, now seen corresponding path program 6 times [2024-06-21 19:28:10,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:28:10,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576140014] [2024-06-21 19:28:10,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:28:10,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:28:10,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:28:20,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:28:20,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:28:20,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576140014] [2024-06-21 19:28:20,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576140014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:28:20,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:28:20,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:28:20,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963067534] [2024-06-21 19:28:20,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:28:20,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:28:20,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:28:20,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:28:20,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:28:20,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:28:20,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 264 transitions, 4631 flow. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:28:20,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:28:20,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:28:20,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:28:22,419 INFO L124 PetriNetUnfolderBase]: 3436/5285 cut-off events. [2024-06-21 19:28:22,420 INFO L125 PetriNetUnfolderBase]: For 365654/365685 co-relation queries the response was YES. [2024-06-21 19:28:22,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49035 conditions, 5285 events. 3436/5285 cut-off events. For 365654/365685 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 28614 event pairs, 784 based on Foata normal form. 42/5312 useless extension candidates. Maximal degree in co-relation 48935. Up to 4683 conditions per place. [2024-06-21 19:28:22,471 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 237 selfloop transitions, 69 changer transitions 0/309 dead transitions. [2024-06-21 19:28:22,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 309 transitions, 5442 flow [2024-06-21 19:28:22,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:28:22,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:28:22,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 19:28:22,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 19:28:22,474 INFO L175 Difference]: Start difference. First operand has 207 places, 264 transitions, 4631 flow. Second operand 8 states and 148 transitions. [2024-06-21 19:28:22,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 309 transitions, 5442 flow [2024-06-21 19:28:22,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 309 transitions, 5293 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 19:28:22,917 INFO L231 Difference]: Finished difference. Result has 209 places, 264 transitions, 4627 flow [2024-06-21 19:28:22,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4482, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4627, PETRI_PLACES=209, PETRI_TRANSITIONS=264} [2024-06-21 19:28:22,918 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-21 19:28:22,918 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 264 transitions, 4627 flow [2024-06-21 19:28:22,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:28:22,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:28:22,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:28:22,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 19:28:22,919 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:28:22,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:28:22,919 INFO L85 PathProgramCache]: Analyzing trace with hash -830350488, now seen corresponding path program 1 times [2024-06-21 19:28:22,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:28:22,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544648912] [2024-06-21 19:28:22,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:28:22,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:28:23,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:28:33,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:28:33,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:28:33,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544648912] [2024-06-21 19:28:33,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544648912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:28:33,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:28:33,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:28:33,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274291174] [2024-06-21 19:28:33,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:28:33,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:28:33,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:28:33,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:28:33,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:28:33,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:28:33,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 264 transitions, 4627 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:28:33,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:28:33,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:28:33,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:28:35,427 INFO L124 PetriNetUnfolderBase]: 3456/5317 cut-off events. [2024-06-21 19:28:35,427 INFO L125 PetriNetUnfolderBase]: For 364950/364981 co-relation queries the response was YES. [2024-06-21 19:28:35,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49493 conditions, 5317 events. 3456/5317 cut-off events. For 364950/364981 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 28819 event pairs, 790 based on Foata normal form. 26/5328 useless extension candidates. Maximal degree in co-relation 49392. Up to 4900 conditions per place. [2024-06-21 19:28:35,473 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 235 selfloop transitions, 63 changer transitions 0/301 dead transitions. [2024-06-21 19:28:35,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 301 transitions, 5398 flow [2024-06-21 19:28:35,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:28:35,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:28:35,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 19:28:35,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-21 19:28:35,488 INFO L175 Difference]: Start difference. First operand has 209 places, 264 transitions, 4627 flow. Second operand 8 states and 134 transitions. [2024-06-21 19:28:35,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 301 transitions, 5398 flow [2024-06-21 19:28:36,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 301 transitions, 5250 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 19:28:36,043 INFO L231 Difference]: Finished difference. Result has 210 places, 266 transitions, 4676 flow [2024-06-21 19:28:36,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4479, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4676, PETRI_PLACES=210, PETRI_TRANSITIONS=266} [2024-06-21 19:28:36,044 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 167 predicate places. [2024-06-21 19:28:36,044 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 266 transitions, 4676 flow [2024-06-21 19:28:36,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:28:36,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:28:36,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:28:36,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 19:28:36,044 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:28:36,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:28:36,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1642126264, now seen corresponding path program 2 times [2024-06-21 19:28:36,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:28:36,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459836015] [2024-06-21 19:28:36,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:28:36,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:28:36,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:28:43,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:28:43,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:28:43,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459836015] [2024-06-21 19:28:43,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459836015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:28:43,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:28:43,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:28:43,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678943710] [2024-06-21 19:28:43,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:28:43,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:28:43,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:28:43,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:28:43,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:28:43,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:28:43,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 266 transitions, 4676 flow. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:28:43,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:28:43,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:28:43,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:28:45,517 INFO L124 PetriNetUnfolderBase]: 3476/5343 cut-off events. [2024-06-21 19:28:45,517 INFO L125 PetriNetUnfolderBase]: For 376486/376493 co-relation queries the response was YES. [2024-06-21 19:28:45,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50092 conditions, 5343 events. 3476/5343 cut-off events. For 376486/376493 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 28840 event pairs, 769 based on Foata normal form. 10/5348 useless extension candidates. Maximal degree in co-relation 49989. Up to 5056 conditions per place. [2024-06-21 19:28:45,565 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 241 selfloop transitions, 54 changer transitions 0/298 dead transitions. [2024-06-21 19:28:45,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 298 transitions, 5396 flow [2024-06-21 19:28:45,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:28:45,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:28:45,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-21 19:28:45,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-21 19:28:45,568 INFO L175 Difference]: Start difference. First operand has 210 places, 266 transitions, 4676 flow. Second operand 9 states and 138 transitions. [2024-06-21 19:28:45,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 298 transitions, 5396 flow [2024-06-21 19:28:46,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 298 transitions, 5217 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 19:28:46,054 INFO L231 Difference]: Finished difference. Result has 213 places, 268 transitions, 4664 flow [2024-06-21 19:28:46,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4497, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4664, PETRI_PLACES=213, PETRI_TRANSITIONS=268} [2024-06-21 19:28:46,055 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-21 19:28:46,055 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 268 transitions, 4664 flow [2024-06-21 19:28:46,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:28:46,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:28:46,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:28:46,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 19:28:46,056 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:28:46,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:28:46,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1831559345, now seen corresponding path program 1 times [2024-06-21 19:28:46,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:28:46,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161517213] [2024-06-21 19:28:46,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:28:46,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:28:46,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:28:54,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:28:54,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:28:54,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161517213] [2024-06-21 19:28:54,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161517213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:28:54,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:28:54,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:28:54,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383450152] [2024-06-21 19:28:54,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:28:54,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:28:54,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:28:54,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:28:54,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:28:54,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:28:54,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 268 transitions, 4664 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:28:54,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:28:54,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:28:54,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:28:56,451 INFO L124 PetriNetUnfolderBase]: 3497/5374 cut-off events. [2024-06-21 19:28:56,451 INFO L125 PetriNetUnfolderBase]: For 392150/392157 co-relation queries the response was YES. [2024-06-21 19:28:56,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50463 conditions, 5374 events. 3497/5374 cut-off events. For 392150/392157 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 29067 event pairs, 824 based on Foata normal form. 12/5381 useless extension candidates. Maximal degree in co-relation 50359. Up to 5082 conditions per place. [2024-06-21 19:28:56,502 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 231 selfloop transitions, 68 changer transitions 0/302 dead transitions. [2024-06-21 19:28:56,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 302 transitions, 5447 flow [2024-06-21 19:28:56,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:28:56,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:28:56,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-21 19:28:56,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36772486772486773 [2024-06-21 19:28:56,505 INFO L175 Difference]: Start difference. First operand has 213 places, 268 transitions, 4664 flow. Second operand 9 states and 139 transitions. [2024-06-21 19:28:56,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 302 transitions, 5447 flow [2024-06-21 19:28:57,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 302 transitions, 5302 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-21 19:28:57,149 INFO L231 Difference]: Finished difference. Result has 215 places, 274 transitions, 4792 flow [2024-06-21 19:28:57,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4519, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4792, PETRI_PLACES=215, PETRI_TRANSITIONS=274} [2024-06-21 19:28:57,151 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-21 19:28:57,151 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 274 transitions, 4792 flow [2024-06-21 19:28:57,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:28:57,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:28:57,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:28:57,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 19:28:57,152 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:28:57,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:28:57,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1831559562, now seen corresponding path program 3 times [2024-06-21 19:28:57,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:28:57,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069602508] [2024-06-21 19:28:57,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:28:57,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:28:57,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:29:04,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:29:04,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:29:04,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069602508] [2024-06-21 19:29:04,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069602508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:29:04,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:29:04,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:29:04,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114861458] [2024-06-21 19:29:04,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:29:04,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:29:04,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:29:04,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:29:04,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:29:04,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:29:04,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 274 transitions, 4792 flow. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:29:04,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:29:04,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:29:04,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:29:06,738 INFO L124 PetriNetUnfolderBase]: 3489/5362 cut-off events. [2024-06-21 19:29:06,739 INFO L125 PetriNetUnfolderBase]: For 400359/400366 co-relation queries the response was YES. [2024-06-21 19:29:06,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50541 conditions, 5362 events. 3489/5362 cut-off events. For 400359/400366 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 28983 event pairs, 822 based on Foata normal form. 10/5367 useless extension candidates. Maximal degree in co-relation 50436. Up to 5086 conditions per place. [2024-06-21 19:29:06,784 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 242 selfloop transitions, 59 changer transitions 0/304 dead transitions. [2024-06-21 19:29:06,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 304 transitions, 5491 flow [2024-06-21 19:29:06,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:29:06,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:29:06,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-21 19:29:06,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-21 19:29:06,786 INFO L175 Difference]: Start difference. First operand has 215 places, 274 transitions, 4792 flow. Second operand 9 states and 138 transitions. [2024-06-21 19:29:06,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 304 transitions, 5491 flow [2024-06-21 19:29:07,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 304 transitions, 5295 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-21 19:29:07,416 INFO L231 Difference]: Finished difference. Result has 217 places, 275 transitions, 4741 flow [2024-06-21 19:29:07,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4596, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4741, PETRI_PLACES=217, PETRI_TRANSITIONS=275} [2024-06-21 19:29:07,417 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-21 19:29:07,417 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 275 transitions, 4741 flow [2024-06-21 19:29:07,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:29:07,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:29:07,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:29:07,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 19:29:07,418 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:29:07,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:29:07,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1825995155, now seen corresponding path program 2 times [2024-06-21 19:29:07,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:29:07,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324952469] [2024-06-21 19:29:07,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:29:07,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:29:07,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:29:16,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:29:16,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:29:16,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324952469] [2024-06-21 19:29:16,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324952469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:29:16,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:29:16,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:29:16,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121511386] [2024-06-21 19:29:16,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:29:16,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:29:16,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:29:16,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:29:16,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:29:16,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:29:16,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 275 transitions, 4741 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:29:16,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:29:16,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:29:16,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:29:18,175 INFO L124 PetriNetUnfolderBase]: 3484/5354 cut-off events. [2024-06-21 19:29:18,176 INFO L125 PetriNetUnfolderBase]: For 410258/410265 co-relation queries the response was YES. [2024-06-21 19:29:18,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50573 conditions, 5354 events. 3484/5354 cut-off events. For 410258/410265 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 29005 event pairs, 818 based on Foata normal form. 8/5357 useless extension candidates. Maximal degree in co-relation 50467. Up to 5007 conditions per place. [2024-06-21 19:29:18,231 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 240 selfloop transitions, 67 changer transitions 0/310 dead transitions. [2024-06-21 19:29:18,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 310 transitions, 5463 flow [2024-06-21 19:29:18,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:29:18,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:29:18,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 19:29:18,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-21 19:29:18,234 INFO L175 Difference]: Start difference. First operand has 217 places, 275 transitions, 4741 flow. Second operand 9 states and 142 transitions. [2024-06-21 19:29:18,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 310 transitions, 5463 flow [2024-06-21 19:29:19,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 310 transitions, 5307 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 19:29:19,112 INFO L231 Difference]: Finished difference. Result has 219 places, 275 transitions, 4735 flow [2024-06-21 19:29:19,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4585, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4735, PETRI_PLACES=219, PETRI_TRANSITIONS=275} [2024-06-21 19:29:19,113 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-21 19:29:19,113 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 275 transitions, 4735 flow [2024-06-21 19:29:19,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:29:19,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:29:19,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:29:19,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 19:29:19,114 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:29:19,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:29:19,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1825995372, now seen corresponding path program 4 times [2024-06-21 19:29:19,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:29:19,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132953678] [2024-06-21 19:29:19,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:29:19,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:29:19,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:29:26,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:29:26,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:29:26,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132953678] [2024-06-21 19:29:26,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132953678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:29:26,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:29:26,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:29:26,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60433009] [2024-06-21 19:29:26,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:29:26,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:29:26,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:29:26,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:29:26,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:29:26,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:29:26,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 275 transitions, 4735 flow. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:29:26,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:29:26,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:29:26,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:29:29,064 INFO L124 PetriNetUnfolderBase]: 3504/5387 cut-off events. [2024-06-21 19:29:29,064 INFO L125 PetriNetUnfolderBase]: For 427947/427954 co-relation queries the response was YES. [2024-06-21 19:29:29,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51104 conditions, 5387 events. 3504/5387 cut-off events. For 427947/427954 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 29213 event pairs, 818 based on Foata normal form. 10/5392 useless extension candidates. Maximal degree in co-relation 50997. Up to 5040 conditions per place. [2024-06-21 19:29:29,114 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 240 selfloop transitions, 64 changer transitions 0/307 dead transitions. [2024-06-21 19:29:29,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 307 transitions, 5494 flow [2024-06-21 19:29:29,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:29:29,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:29:29,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 19:29:29,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-21 19:29:29,116 INFO L175 Difference]: Start difference. First operand has 219 places, 275 transitions, 4735 flow. Second operand 8 states and 131 transitions. [2024-06-21 19:29:29,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 307 transitions, 5494 flow [2024-06-21 19:29:29,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 307 transitions, 5326 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-21 19:29:29,701 INFO L231 Difference]: Finished difference. Result has 219 places, 277 transitions, 4770 flow [2024-06-21 19:29:29,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4567, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4770, PETRI_PLACES=219, PETRI_TRANSITIONS=277} [2024-06-21 19:29:29,701 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-21 19:29:29,701 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 277 transitions, 4770 flow [2024-06-21 19:29:29,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:29:29,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:29:29,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:29:29,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 19:29:29,702 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:29:29,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:29:29,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1831351800, now seen corresponding path program 7 times [2024-06-21 19:29:29,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:29:29,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131022780] [2024-06-21 19:29:29,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:29:29,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:29:29,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:29:37,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:29:37,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:29:37,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131022780] [2024-06-21 19:29:37,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131022780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:29:37,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:29:37,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:29:37,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046084697] [2024-06-21 19:29:37,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:29:37,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:29:37,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:29:37,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:29:37,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:29:37,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:29:37,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 277 transitions, 4770 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:29:37,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:29:37,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:29:37,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:29:40,481 INFO L124 PetriNetUnfolderBase]: 3660/5651 cut-off events. [2024-06-21 19:29:40,482 INFO L125 PetriNetUnfolderBase]: For 473874/473881 co-relation queries the response was YES. [2024-06-21 19:29:40,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53014 conditions, 5651 events. 3660/5651 cut-off events. For 473874/473881 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 31135 event pairs, 848 based on Foata normal form. 42/5688 useless extension candidates. Maximal degree in co-relation 52907. Up to 5169 conditions per place. [2024-06-21 19:29:40,534 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 259 selfloop transitions, 56 changer transitions 0/318 dead transitions. [2024-06-21 19:29:40,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 318 transitions, 5646 flow [2024-06-21 19:29:40,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:29:40,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:29:40,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-06-21 19:29:40,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-21 19:29:40,536 INFO L175 Difference]: Start difference. First operand has 219 places, 277 transitions, 4770 flow. Second operand 10 states and 154 transitions. [2024-06-21 19:29:40,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 318 transitions, 5646 flow [2024-06-21 19:29:41,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 318 transitions, 5461 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 19:29:41,239 INFO L231 Difference]: Finished difference. Result has 223 places, 279 transitions, 4803 flow [2024-06-21 19:29:41,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4585, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4803, PETRI_PLACES=223, PETRI_TRANSITIONS=279} [2024-06-21 19:29:41,240 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-21 19:29:41,240 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 279 transitions, 4803 flow [2024-06-21 19:29:41,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:29:41,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:29:41,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:29:41,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 19:29:41,240 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:29:41,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:29:41,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1825845270, now seen corresponding path program 8 times [2024-06-21 19:29:41,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:29:41,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661182058] [2024-06-21 19:29:41,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:29:41,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:29:41,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:29:49,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:29:49,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:29:49,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661182058] [2024-06-21 19:29:49,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661182058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:29:49,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:29:49,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:29:49,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718887470] [2024-06-21 19:29:49,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:29:49,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:29:49,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:29:49,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:29:49,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:29:49,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:29:49,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 279 transitions, 4803 flow. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:29:49,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:29:49,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:29:49,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:29:51,919 INFO L124 PetriNetUnfolderBase]: 3784/5853 cut-off events. [2024-06-21 19:29:51,920 INFO L125 PetriNetUnfolderBase]: For 476538/476545 co-relation queries the response was YES. [2024-06-21 19:29:51,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54682 conditions, 5853 events. 3784/5853 cut-off events. For 476538/476545 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 32646 event pairs, 865 based on Foata normal form. 26/5874 useless extension candidates. Maximal degree in co-relation 54574. Up to 5083 conditions per place. [2024-06-21 19:29:51,977 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 210 selfloop transitions, 124 changer transitions 0/337 dead transitions. [2024-06-21 19:29:51,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 337 transitions, 6054 flow [2024-06-21 19:29:51,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:29:51,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:29:51,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-21 19:29:51,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 19:29:51,981 INFO L175 Difference]: Start difference. First operand has 223 places, 279 transitions, 4803 flow. Second operand 10 states and 168 transitions. [2024-06-21 19:29:51,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 337 transitions, 6054 flow [2024-06-21 19:29:52,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 337 transitions, 5883 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 19:29:52,726 INFO L231 Difference]: Finished difference. Result has 226 places, 291 transitions, 5108 flow [2024-06-21 19:29:52,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4632, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5108, PETRI_PLACES=226, PETRI_TRANSITIONS=291} [2024-06-21 19:29:52,727 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-21 19:29:52,727 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 291 transitions, 5108 flow [2024-06-21 19:29:52,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:29:52,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:29:52,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:29:52,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 19:29:52,727 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:29:52,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:29:52,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1825989420, now seen corresponding path program 9 times [2024-06-21 19:29:52,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:29:52,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577720840] [2024-06-21 19:29:52,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:29:52,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:29:52,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:30:00,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:30:00,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:30:00,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577720840] [2024-06-21 19:30:00,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577720840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:30:00,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:30:00,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:30:00,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930278534] [2024-06-21 19:30:00,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:30:00,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:30:00,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:30:00,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:30:00,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:30:00,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:30:00,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 291 transitions, 5108 flow. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:30:00,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:30:00,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:30:00,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:30:03,058 INFO L124 PetriNetUnfolderBase]: 3912/6074 cut-off events. [2024-06-21 19:30:03,058 INFO L125 PetriNetUnfolderBase]: For 513898/513905 co-relation queries the response was YES. [2024-06-21 19:30:03,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56682 conditions, 6074 events. 3912/6074 cut-off events. For 513898/513905 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 34392 event pairs, 903 based on Foata normal form. 42/6111 useless extension candidates. Maximal degree in co-relation 56572. Up to 5443 conditions per place. [2024-06-21 19:30:03,126 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 257 selfloop transitions, 72 changer transitions 0/332 dead transitions. [2024-06-21 19:30:03,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 332 transitions, 6032 flow [2024-06-21 19:30:03,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:30:03,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:30:03,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-21 19:30:03,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-21 19:30:03,129 INFO L175 Difference]: Start difference. First operand has 226 places, 291 transitions, 5108 flow. Second operand 9 states and 149 transitions. [2024-06-21 19:30:03,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 332 transitions, 6032 flow [2024-06-21 19:30:03,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 332 transitions, 5856 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 19:30:04,074 INFO L231 Difference]: Finished difference. Result has 230 places, 293 transitions, 5188 flow [2024-06-21 19:30:04,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4932, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5188, PETRI_PLACES=230, PETRI_TRANSITIONS=293} [2024-06-21 19:30:04,075 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 187 predicate places. [2024-06-21 19:30:04,075 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 293 transitions, 5188 flow [2024-06-21 19:30:04,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:30:04,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:30:04,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:30:04,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 19:30:04,076 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:30:04,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:30:04,076 INFO L85 PathProgramCache]: Analyzing trace with hash 782878096, now seen corresponding path program 10 times [2024-06-21 19:30:04,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:30:04,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974835410] [2024-06-21 19:30:04,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:30:04,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:30:04,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:30:11,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:30:11,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:30:11,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974835410] [2024-06-21 19:30:11,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974835410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:30:11,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:30:11,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:30:11,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398763241] [2024-06-21 19:30:11,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:30:11,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:30:11,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:30:11,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:30:11,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:30:11,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:30:11,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 293 transitions, 5188 flow. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:30:11,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:30:11,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:30:11,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:30:13,660 INFO L124 PetriNetUnfolderBase]: 3952/6147 cut-off events. [2024-06-21 19:30:13,660 INFO L125 PetriNetUnfolderBase]: For 503463/503470 co-relation queries the response was YES. [2024-06-21 19:30:13,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57090 conditions, 6147 events. 3952/6147 cut-off events. For 503463/503470 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 34875 event pairs, 882 based on Foata normal form. 22/6164 useless extension candidates. Maximal degree in co-relation 56979. Up to 4649 conditions per place. [2024-06-21 19:30:13,725 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 225 selfloop transitions, 112 changer transitions 0/340 dead transitions. [2024-06-21 19:30:13,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 340 transitions, 6532 flow [2024-06-21 19:30:13,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:30:13,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:30:13,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 19:30:13,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-21 19:30:13,728 INFO L175 Difference]: Start difference. First operand has 230 places, 293 transitions, 5188 flow. Second operand 9 states and 155 transitions. [2024-06-21 19:30:13,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 340 transitions, 6532 flow [2024-06-21 19:30:14,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 340 transitions, 6359 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-21 19:30:14,703 INFO L231 Difference]: Finished difference. Result has 233 places, 294 transitions, 5326 flow [2024-06-21 19:30:14,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5015, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5326, PETRI_PLACES=233, PETRI_TRANSITIONS=294} [2024-06-21 19:30:14,703 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-21 19:30:14,703 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 294 transitions, 5326 flow [2024-06-21 19:30:14,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:30:14,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:30:14,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:30:14,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 19:30:14,704 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)] === [2024-06-21 19:30:14,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:30:14,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1858375301, now seen corresponding path program 1 times [2024-06-21 19:30:14,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:30:14,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516174837] [2024-06-21 19:30:14,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:30:14,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:30:14,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:30:20,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:30:20,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:30:20,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516174837] [2024-06-21 19:30:20,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516174837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:30:20,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:30:20,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:30:20,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959891317] [2024-06-21 19:30:20,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:30:20,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:30:20,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:30:20,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:30:20,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:30:20,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:30:20,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 294 transitions, 5326 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:30:20,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:30:20,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:30:20,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:30:23,142 INFO L124 PetriNetUnfolderBase]: 4004/6222 cut-off events. [2024-06-21 19:30:23,143 INFO L125 PetriNetUnfolderBase]: For 509227/509236 co-relation queries the response was YES. [2024-06-21 19:30:23,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58288 conditions, 6222 events. 4004/6222 cut-off events. For 509227/509236 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 35648 event pairs, 912 based on Foata normal form. 10/6221 useless extension candidates. Maximal degree in co-relation 58175. Up to 5871 conditions per place. [2024-06-21 19:30:23,209 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 270 selfloop transitions, 61 changer transitions 0/334 dead transitions. [2024-06-21 19:30:23,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 334 transitions, 6583 flow [2024-06-21 19:30:23,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:30:23,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:30:23,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-21 19:30:23,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 19:30:23,211 INFO L175 Difference]: Start difference. First operand has 233 places, 294 transitions, 5326 flow. Second operand 6 states and 108 transitions. [2024-06-21 19:30:23,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 334 transitions, 6583 flow [2024-06-21 19:30:24,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 334 transitions, 6327 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 19:30:24,108 INFO L231 Difference]: Finished difference. Result has 235 places, 308 transitions, 5510 flow [2024-06-21 19:30:24,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5070, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5510, PETRI_PLACES=235, PETRI_TRANSITIONS=308} [2024-06-21 19:30:24,109 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-21 19:30:24,109 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 308 transitions, 5510 flow [2024-06-21 19:30:24,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:30:24,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:30:24,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:30:24,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 19:30:24,109 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:30:24,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:30:24,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1023142794, now seen corresponding path program 5 times [2024-06-21 19:30:24,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:30:24,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657796321] [2024-06-21 19:30:24,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:30:24,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:30:24,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:30:31,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:30:31,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:30:31,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657796321] [2024-06-21 19:30:31,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657796321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:30:31,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:30:31,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:30:31,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830228854] [2024-06-21 19:30:31,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:30:31,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:30:31,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:30:31,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:30:31,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:30:31,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:30:31,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 308 transitions, 5510 flow. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:30:31,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:30:31,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:30:31,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:30:33,722 INFO L124 PetriNetUnfolderBase]: 4024/6250 cut-off events. [2024-06-21 19:30:33,722 INFO L125 PetriNetUnfolderBase]: For 523788/523795 co-relation queries the response was YES. [2024-06-21 19:30:33,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59140 conditions, 6250 events. 4024/6250 cut-off events. For 523788/523795 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 35678 event pairs, 907 based on Foata normal form. 10/6255 useless extension candidates. Maximal degree in co-relation 59024. Up to 5954 conditions per place. [2024-06-21 19:30:33,779 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 279 selfloop transitions, 58 changer transitions 0/340 dead transitions. [2024-06-21 19:30:33,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 340 transitions, 6331 flow [2024-06-21 19:30:33,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:30:33,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:30:33,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-21 19:30:33,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36243386243386244 [2024-06-21 19:30:33,782 INFO L175 Difference]: Start difference. First operand has 235 places, 308 transitions, 5510 flow. Second operand 9 states and 137 transitions. [2024-06-21 19:30:33,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 340 transitions, 6331 flow [2024-06-21 19:30:34,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 340 transitions, 6287 flow, removed 20 selfloop flow, removed 1 redundant places. [2024-06-21 19:30:34,912 INFO L231 Difference]: Finished difference. Result has 243 places, 310 transitions, 5645 flow [2024-06-21 19:30:34,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5466, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5645, PETRI_PLACES=243, PETRI_TRANSITIONS=310} [2024-06-21 19:30:34,913 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-21 19:30:34,913 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 310 transitions, 5645 flow [2024-06-21 19:30:34,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:30:34,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:30:34,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:30:34,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 19:30:34,914 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:30:34,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:30:34,914 INFO L85 PathProgramCache]: Analyzing trace with hash -388421642, now seen corresponding path program 6 times [2024-06-21 19:30:34,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:30:34,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231799929] [2024-06-21 19:30:34,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:30:34,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:30:34,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:30:42,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:30:42,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:30:42,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231799929] [2024-06-21 19:30:42,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231799929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:30:42,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:30:42,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:30:42,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589844107] [2024-06-21 19:30:42,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:30:42,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:30:42,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:30:42,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:30:42,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:30:42,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:30:42,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 310 transitions, 5645 flow. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:30:42,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:30:42,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:30:42,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:30:44,861 INFO L124 PetriNetUnfolderBase]: 4016/6239 cut-off events. [2024-06-21 19:30:44,862 INFO L125 PetriNetUnfolderBase]: For 536612/536619 co-relation queries the response was YES. [2024-06-21 19:30:44,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59430 conditions, 6239 events. 4016/6239 cut-off events. For 536612/536619 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 35561 event pairs, 845 based on Foata normal form. 10/6244 useless extension candidates. Maximal degree in co-relation 59311. Up to 5862 conditions per place. [2024-06-21 19:30:44,919 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 281 selfloop transitions, 58 changer transitions 0/342 dead transitions. [2024-06-21 19:30:44,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 342 transitions, 6440 flow [2024-06-21 19:30:44,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:30:44,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:30:44,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-21 19:30:44,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35978835978835977 [2024-06-21 19:30:44,922 INFO L175 Difference]: Start difference. First operand has 243 places, 310 transitions, 5645 flow. Second operand 9 states and 136 transitions. [2024-06-21 19:30:44,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 342 transitions, 6440 flow [2024-06-21 19:30:45,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 342 transitions, 6297 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 19:30:45,751 INFO L231 Difference]: Finished difference. Result has 245 places, 311 transitions, 5650 flow [2024-06-21 19:30:45,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5502, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5650, PETRI_PLACES=245, PETRI_TRANSITIONS=311} [2024-06-21 19:30:45,751 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-21 19:30:45,751 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 311 transitions, 5650 flow [2024-06-21 19:30:45,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:30:45,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:30:45,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:30:45,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 19:30:45,752 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:30:45,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:30:45,752 INFO L85 PathProgramCache]: Analyzing trace with hash -919726774, now seen corresponding path program 7 times [2024-06-21 19:30:45,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:30:45,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761066764] [2024-06-21 19:30:45,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:30:45,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:30:45,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:30:52,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:30:52,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:30:52,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761066764] [2024-06-21 19:30:52,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761066764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:30:52,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:30:52,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:30:52,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095697612] [2024-06-21 19:30:52,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:30:52,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:30:52,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:30:52,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:30:52,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:30:53,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:30:53,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 311 transitions, 5650 flow. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:30:53,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:30:53,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:30:53,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:30:56,014 INFO L124 PetriNetUnfolderBase]: 4008/6226 cut-off events. [2024-06-21 19:30:56,014 INFO L125 PetriNetUnfolderBase]: For 547268/547275 co-relation queries the response was YES. [2024-06-21 19:30:56,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59439 conditions, 6226 events. 4008/6226 cut-off events. For 547268/547275 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 35539 event pairs, 909 based on Foata normal form. 10/6231 useless extension candidates. Maximal degree in co-relation 59319. Up to 5900 conditions per place. [2024-06-21 19:30:56,085 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 274 selfloop transitions, 65 changer transitions 0/342 dead transitions. [2024-06-21 19:30:56,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 342 transitions, 6495 flow [2024-06-21 19:30:56,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:30:56,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:30:56,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-21 19:30:56,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36772486772486773 [2024-06-21 19:30:56,087 INFO L175 Difference]: Start difference. First operand has 245 places, 311 transitions, 5650 flow. Second operand 9 states and 139 transitions. [2024-06-21 19:30:56,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 342 transitions, 6495 flow [2024-06-21 19:30:57,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 342 transitions, 6348 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 19:30:57,357 INFO L231 Difference]: Finished difference. Result has 247 places, 313 transitions, 5719 flow [2024-06-21 19:30:57,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5503, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5719, PETRI_PLACES=247, PETRI_TRANSITIONS=313} [2024-06-21 19:30:57,357 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-21 19:30:57,358 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 313 transitions, 5719 flow [2024-06-21 19:30:57,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:30:57,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:30:57,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:30:57,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 19:30:57,358 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:30:57,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:30:57,359 INFO L85 PathProgramCache]: Analyzing trace with hash -397626069, now seen corresponding path program 3 times [2024-06-21 19:30:57,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:30:57,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108953162] [2024-06-21 19:30:57,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:30:57,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:30:57,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:31:04,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:31:04,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:31:04,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108953162] [2024-06-21 19:31:04,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108953162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:31:04,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:31:04,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:31:04,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075421003] [2024-06-21 19:31:04,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:31:04,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:31:04,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:31:04,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:31:04,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:31:04,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:31:04,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 313 transitions, 5719 flow. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:31:04,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:31:04,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:31:04,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:31:07,078 INFO L124 PetriNetUnfolderBase]: 4003/6218 cut-off events. [2024-06-21 19:31:07,078 INFO L125 PetriNetUnfolderBase]: For 558032/558039 co-relation queries the response was YES. [2024-06-21 19:31:07,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59610 conditions, 6218 events. 4003/6218 cut-off events. For 558032/558039 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 35479 event pairs, 906 based on Foata normal form. 8/6221 useless extension candidates. Maximal degree in co-relation 59489. Up to 5899 conditions per place. [2024-06-21 19:31:07,292 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 274 selfloop transitions, 73 changer transitions 0/350 dead transitions. [2024-06-21 19:31:07,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 350 transitions, 6545 flow [2024-06-21 19:31:07,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:31:07,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:31:07,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 170 transitions. [2024-06-21 19:31:07,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36796536796536794 [2024-06-21 19:31:07,294 INFO L175 Difference]: Start difference. First operand has 247 places, 313 transitions, 5719 flow. Second operand 11 states and 170 transitions. [2024-06-21 19:31:07,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 350 transitions, 6545 flow [2024-06-21 19:31:08,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 350 transitions, 6327 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-21 19:31:08,277 INFO L231 Difference]: Finished difference. Result has 251 places, 314 transitions, 5681 flow [2024-06-21 19:31:08,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5503, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5681, PETRI_PLACES=251, PETRI_TRANSITIONS=314} [2024-06-21 19:31:08,277 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 208 predicate places. [2024-06-21 19:31:08,277 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 314 transitions, 5681 flow [2024-06-21 19:31:08,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:31:08,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:31:08,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:31:08,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 19:31:08,278 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:31:08,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:31:08,279 INFO L85 PathProgramCache]: Analyzing trace with hash -654328389, now seen corresponding path program 4 times [2024-06-21 19:31:08,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:31:08,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624865072] [2024-06-21 19:31:08,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:31:08,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:31:08,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:31:15,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:31:15,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:31:15,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624865072] [2024-06-21 19:31:15,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624865072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:31:15,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:31:15,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:31:15,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766720670] [2024-06-21 19:31:15,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:31:15,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:31:15,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:31:15,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:31:15,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:31:15,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:31:15,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 314 transitions, 5681 flow. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:31:15,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:31:15,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:31:15,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:31:18,324 INFO L124 PetriNetUnfolderBase]: 3998/6212 cut-off events. [2024-06-21 19:31:18,324 INFO L125 PetriNetUnfolderBase]: For 570162/570169 co-relation queries the response was YES. [2024-06-21 19:31:18,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59590 conditions, 6212 events. 3998/6212 cut-off events. For 570162/570169 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 35459 event pairs, 905 based on Foata normal form. 8/6215 useless extension candidates. Maximal degree in co-relation 59468. Up to 5859 conditions per place. [2024-06-21 19:31:18,380 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 266 selfloop transitions, 73 changer transitions 0/342 dead transitions. [2024-06-21 19:31:18,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 342 transitions, 6450 flow [2024-06-21 19:31:18,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:31:18,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:31:18,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 19:31:18,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-21 19:31:18,391 INFO L175 Difference]: Start difference. First operand has 251 places, 314 transitions, 5681 flow. Second operand 7 states and 127 transitions. [2024-06-21 19:31:18,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 342 transitions, 6450 flow [2024-06-21 19:31:19,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 342 transitions, 6219 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-21 19:31:19,426 INFO L231 Difference]: Finished difference. Result has 249 places, 314 transitions, 5615 flow [2024-06-21 19:31:19,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5450, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5615, PETRI_PLACES=249, PETRI_TRANSITIONS=314} [2024-06-21 19:31:19,426 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 206 predicate places. [2024-06-21 19:31:19,426 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 314 transitions, 5615 flow [2024-06-21 19:31:19,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:31:19,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:31:19,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:31:19,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 19:31:19,427 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:31:19,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:31:19,427 INFO L85 PathProgramCache]: Analyzing trace with hash -854797583, now seen corresponding path program 2 times [2024-06-21 19:31:19,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:31:19,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051115880] [2024-06-21 19:31:19,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:31:19,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:31:19,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:31:25,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:31:25,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:31:25,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051115880] [2024-06-21 19:31:25,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051115880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:31:25,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:31:25,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:31:25,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065594431] [2024-06-21 19:31:25,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:31:25,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:31:25,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:31:25,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:31:25,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:31:25,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:31:25,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 314 transitions, 5615 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:31:25,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:31:25,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:31:25,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:31:27,923 INFO L124 PetriNetUnfolderBase]: 4150/6425 cut-off events. [2024-06-21 19:31:27,923 INFO L125 PetriNetUnfolderBase]: For 623569/623572 co-relation queries the response was YES. [2024-06-21 19:31:27,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61983 conditions, 6425 events. 4150/6425 cut-off events. For 623569/623572 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 36752 event pairs, 936 based on Foata normal form. 14/6436 useless extension candidates. Maximal degree in co-relation 61861. Up to 6230 conditions per place. [2024-06-21 19:31:27,988 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 313 selfloop transitions, 32 changer transitions 0/348 dead transitions. [2024-06-21 19:31:27,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 348 transitions, 6778 flow [2024-06-21 19:31:27,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:31:27,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:31:27,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2024-06-21 19:31:27,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3482142857142857 [2024-06-21 19:31:27,990 INFO L175 Difference]: Start difference. First operand has 249 places, 314 transitions, 5615 flow. Second operand 8 states and 117 transitions. [2024-06-21 19:31:27,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 348 transitions, 6778 flow [2024-06-21 19:31:29,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 348 transitions, 6575 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 19:31:29,057 INFO L231 Difference]: Finished difference. Result has 251 places, 329 transitions, 5789 flow [2024-06-21 19:31:29,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5416, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5789, PETRI_PLACES=251, PETRI_TRANSITIONS=329} [2024-06-21 19:31:29,058 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 208 predicate places. [2024-06-21 19:31:29,058 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 329 transitions, 5789 flow [2024-06-21 19:31:29,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:31:29,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:31:29,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:31:29,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 19:31:29,059 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)] === [2024-06-21 19:31:29,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:31:29,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1538070355, now seen corresponding path program 3 times [2024-06-21 19:31:29,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:31:29,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211566319] [2024-06-21 19:31:29,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:31:29,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:31:29,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:31:34,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:31:34,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:31:34,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211566319] [2024-06-21 19:31:34,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211566319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:31:34,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:31:34,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:31:34,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110648458] [2024-06-21 19:31:34,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:31:34,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:31:34,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:31:34,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:31:34,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:31:34,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:31:34,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 329 transitions, 5789 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:31:34,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:31:34,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:31:34,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:31:36,972 INFO L124 PetriNetUnfolderBase]: 4164/6448 cut-off events. [2024-06-21 19:31:36,973 INFO L125 PetriNetUnfolderBase]: For 589521/589529 co-relation queries the response was YES. [2024-06-21 19:31:37,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62219 conditions, 6448 events. 4164/6448 cut-off events. For 589521/589529 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 37008 event pairs, 965 based on Foata normal form. 8/6447 useless extension candidates. Maximal degree in co-relation 62095. Up to 6070 conditions per place. [2024-06-21 19:31:37,058 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 289 selfloop transitions, 77 changer transitions 0/369 dead transitions. [2024-06-21 19:31:37,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 369 transitions, 7060 flow [2024-06-21 19:31:37,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:31:37,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:31:37,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 19:31:37,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-21 19:31:37,060 INFO L175 Difference]: Start difference. First operand has 251 places, 329 transitions, 5789 flow. Second operand 7 states and 127 transitions. [2024-06-21 19:31:37,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 369 transitions, 7060 flow [2024-06-21 19:31:38,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 369 transitions, 6907 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-21 19:31:38,061 INFO L231 Difference]: Finished difference. Result has 254 places, 336 transitions, 5936 flow [2024-06-21 19:31:38,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5638, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5936, PETRI_PLACES=254, PETRI_TRANSITIONS=336} [2024-06-21 19:31:38,061 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-21 19:31:38,061 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 336 transitions, 5936 flow [2024-06-21 19:31:38,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:31:38,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:31:38,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:31:38,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 19:31:38,062 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:31:38,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:31:38,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1272888474, now seen corresponding path program 1 times [2024-06-21 19:31:38,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:31:38,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107163007] [2024-06-21 19:31:38,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:31:38,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:31:38,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:31:47,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:31:47,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:31:47,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107163007] [2024-06-21 19:31:47,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107163007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:31:47,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:31:47,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:31:47,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723265042] [2024-06-21 19:31:47,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:31:47,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:31:47,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:31:47,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:31:47,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:31:47,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:31:47,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 336 transitions, 5936 flow. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:31:47,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:31:47,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:31:47,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:31:50,670 INFO L124 PetriNetUnfolderBase]: 4136/6407 cut-off events. [2024-06-21 19:31:50,671 INFO L125 PetriNetUnfolderBase]: For 602567/602604 co-relation queries the response was YES. [2024-06-21 19:31:50,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61274 conditions, 6407 events. 4136/6407 cut-off events. For 602567/602604 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 36781 event pairs, 961 based on Foata normal form. 42/6434 useless extension candidates. Maximal degree in co-relation 61150. Up to 5672 conditions per place. [2024-06-21 19:31:50,732 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 280 selfloop transitions, 98 changer transitions 0/381 dead transitions. [2024-06-21 19:31:50,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 381 transitions, 6864 flow [2024-06-21 19:31:50,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:31:50,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:31:50,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 19:31:50,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 19:31:50,735 INFO L175 Difference]: Start difference. First operand has 254 places, 336 transitions, 5936 flow. Second operand 8 states and 152 transitions. [2024-06-21 19:31:50,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 381 transitions, 6864 flow [2024-06-21 19:31:51,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 381 transitions, 6736 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-21 19:31:51,879 INFO L231 Difference]: Finished difference. Result has 259 places, 336 transitions, 6013 flow [2024-06-21 19:31:51,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5808, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6013, PETRI_PLACES=259, PETRI_TRANSITIONS=336} [2024-06-21 19:31:51,881 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-21 19:31:51,881 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 336 transitions, 6013 flow [2024-06-21 19:31:51,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:31:51,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:31:51,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:31:51,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 19:31:51,881 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:31:51,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:31:51,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1801221372, now seen corresponding path program 2 times [2024-06-21 19:31:51,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:31:51,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429139290] [2024-06-21 19:31:51,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:31:51,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:31:51,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:32:04,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:32:04,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:32:04,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429139290] [2024-06-21 19:32:04,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429139290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:32:04,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:32:04,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:32:04,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560559132] [2024-06-21 19:32:04,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:32:04,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:32:04,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:32:04,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:32:04,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:32:04,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:32:04,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 336 transitions, 6013 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 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) [2024-06-21 19:32:04,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:32:04,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:32:04,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:32:07,210 INFO L124 PetriNetUnfolderBase]: 4184/6491 cut-off events. [2024-06-21 19:32:07,210 INFO L125 PetriNetUnfolderBase]: For 616883/616920 co-relation queries the response was YES. [2024-06-21 19:32:07,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62234 conditions, 6491 events. 4184/6491 cut-off events. For 616883/616920 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 37506 event pairs, 902 based on Foata normal form. 38/6514 useless extension candidates. Maximal degree in co-relation 62109. Up to 5986 conditions per place. [2024-06-21 19:32:07,278 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 312 selfloop transitions, 64 changer transitions 0/379 dead transitions. [2024-06-21 19:32:07,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 379 transitions, 6973 flow [2024-06-21 19:32:07,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:32:07,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:32:07,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-21 19:32:07,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-21 19:32:07,281 INFO L175 Difference]: Start difference. First operand has 259 places, 336 transitions, 6013 flow. Second operand 9 states and 149 transitions. [2024-06-21 19:32:07,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 379 transitions, 6973 flow [2024-06-21 19:32:08,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 379 transitions, 6768 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 19:32:08,542 INFO L231 Difference]: Finished difference. Result has 261 places, 337 transitions, 6000 flow [2024-06-21 19:32:08,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5808, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6000, PETRI_PLACES=261, PETRI_TRANSITIONS=337} [2024-06-21 19:32:08,543 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-21 19:32:08,543 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 337 transitions, 6000 flow [2024-06-21 19:32:08,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 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) [2024-06-21 19:32:08,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:32:08,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:32:08,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 19:32:08,544 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)] === [2024-06-21 19:32:08,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:32:08,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1246569128, now seen corresponding path program 1 times [2024-06-21 19:32:08,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:32:08,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908167025] [2024-06-21 19:32:08,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:32:08,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:32:08,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:32:14,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:32:14,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:32:14,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908167025] [2024-06-21 19:32:14,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908167025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:32:14,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:32:14,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:32:14,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441014646] [2024-06-21 19:32:14,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:32:14,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:32:14,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:32:14,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:32:14,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:32:14,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:32:14,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 337 transitions, 6000 flow. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:32:14,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:32:14,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:32:14,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:32:17,270 INFO L124 PetriNetUnfolderBase]: 4212/6523 cut-off events. [2024-06-21 19:32:17,270 INFO L125 PetriNetUnfolderBase]: For 597833/597840 co-relation queries the response was YES. [2024-06-21 19:32:17,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62653 conditions, 6523 events. 4212/6523 cut-off events. For 597833/597840 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 37486 event pairs, 946 based on Foata normal form. 7/6527 useless extension candidates. Maximal degree in co-relation 62526. Up to 6425 conditions per place. [2024-06-21 19:32:17,329 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 343 selfloop transitions, 35 changer transitions 0/381 dead transitions. [2024-06-21 19:32:17,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 381 transitions, 7307 flow [2024-06-21 19:32:17,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:32:17,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:32:17,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-21 19:32:17,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-21 19:32:17,332 INFO L175 Difference]: Start difference. First operand has 261 places, 337 transitions, 6000 flow. Second operand 7 states and 115 transitions. [2024-06-21 19:32:17,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 381 transitions, 7307 flow [2024-06-21 19:32:18,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 381 transitions, 7133 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 19:32:18,221 INFO L231 Difference]: Finished difference. Result has 264 places, 358 transitions, 6345 flow [2024-06-21 19:32:18,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5832, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6345, PETRI_PLACES=264, PETRI_TRANSITIONS=358} [2024-06-21 19:32:18,221 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-21 19:32:18,222 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 358 transitions, 6345 flow [2024-06-21 19:32:18,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:32:18,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:32:18,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:32:18,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 19:32:18,222 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:32:18,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:32:18,223 INFO L85 PathProgramCache]: Analyzing trace with hash 768795946, now seen corresponding path program 3 times [2024-06-21 19:32:18,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:32:18,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635375423] [2024-06-21 19:32:18,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:32:18,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:32:18,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:32:25,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:32:25,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:32:25,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635375423] [2024-06-21 19:32:25,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635375423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:32:25,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:32:25,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:32:25,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818669851] [2024-06-21 19:32:25,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:32:25,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:32:25,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:32:25,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:32:25,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:32:25,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:32:25,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 358 transitions, 6345 flow. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:32:25,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:32:25,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:32:25,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:32:28,764 INFO L124 PetriNetUnfolderBase]: 4260/6609 cut-off events. [2024-06-21 19:32:28,765 INFO L125 PetriNetUnfolderBase]: For 632844/632865 co-relation queries the response was YES. [2024-06-21 19:32:28,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63635 conditions, 6609 events. 4260/6609 cut-off events. For 632844/632865 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 38082 event pairs, 877 based on Foata normal form. 30/6634 useless extension candidates. Maximal degree in co-relation 63503. Up to 6211 conditions per place. [2024-06-21 19:32:28,836 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 333 selfloop transitions, 69 changer transitions 0/405 dead transitions. [2024-06-21 19:32:28,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 405 transitions, 7353 flow [2024-06-21 19:32:28,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:32:28,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:32:28,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 182 transitions. [2024-06-21 19:32:28,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3611111111111111 [2024-06-21 19:32:28,839 INFO L175 Difference]: Start difference. First operand has 264 places, 358 transitions, 6345 flow. Second operand 12 states and 182 transitions. [2024-06-21 19:32:28,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 405 transitions, 7353 flow [2024-06-21 19:32:30,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 405 transitions, 7269 flow, removed 40 selfloop flow, removed 1 redundant places. [2024-06-21 19:32:30,046 INFO L231 Difference]: Finished difference. Result has 275 places, 359 transitions, 6465 flow [2024-06-21 19:32:30,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6261, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6465, PETRI_PLACES=275, PETRI_TRANSITIONS=359} [2024-06-21 19:32:30,048 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-21 19:32:30,048 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 359 transitions, 6465 flow [2024-06-21 19:32:30,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:32:30,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:32:30,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:32:30,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 19:32:30,051 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:32:30,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:32:30,051 INFO L85 PathProgramCache]: Analyzing trace with hash 943767834, now seen corresponding path program 1 times [2024-06-21 19:32:30,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:32:30,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643643941] [2024-06-21 19:32:30,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:32:30,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:32:30,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:32:38,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:32:38,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:32:38,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643643941] [2024-06-21 19:32:38,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643643941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:32:38,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:32:38,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:32:38,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985732596] [2024-06-21 19:32:38,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:32:38,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:32:38,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:32:38,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:32:38,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:32:38,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:32:38,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 359 transitions, 6465 flow. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:32:38,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:32:38,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:32:38,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:32:41,110 INFO L124 PetriNetUnfolderBase]: 4328/6726 cut-off events. [2024-06-21 19:32:41,110 INFO L125 PetriNetUnfolderBase]: For 664767/664788 co-relation queries the response was YES. [2024-06-21 19:32:41,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65064 conditions, 6726 events. 4328/6726 cut-off events. For 664767/664788 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 39104 event pairs, 973 based on Foata normal form. 34/6755 useless extension candidates. Maximal degree in co-relation 64929. Up to 6040 conditions per place. [2024-06-21 19:32:41,192 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 314 selfloop transitions, 81 changer transitions 0/398 dead transitions. [2024-06-21 19:32:41,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 398 transitions, 7469 flow [2024-06-21 19:32:41,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:32:41,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:32:41,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 19:32:41,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-21 19:32:41,195 INFO L175 Difference]: Start difference. First operand has 275 places, 359 transitions, 6465 flow. Second operand 9 states and 150 transitions. [2024-06-21 19:32:41,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 398 transitions, 7469 flow [2024-06-21 19:32:42,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 398 transitions, 7267 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-21 19:32:42,479 INFO L231 Difference]: Finished difference. Result has 275 places, 360 transitions, 6491 flow [2024-06-21 19:32:42,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6263, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6491, PETRI_PLACES=275, PETRI_TRANSITIONS=360} [2024-06-21 19:32:42,488 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-21 19:32:42,489 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 360 transitions, 6491 flow [2024-06-21 19:32:42,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:32:42,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:32:42,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:32:42,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 19:32:42,489 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:32:42,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:32:42,490 INFO L85 PathProgramCache]: Analyzing trace with hash 943774530, now seen corresponding path program 4 times [2024-06-21 19:32:42,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:32:42,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413401610] [2024-06-21 19:32:42,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:32:42,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:32:42,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:32:50,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:32:50,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:32:50,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413401610] [2024-06-21 19:32:50,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413401610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:32:50,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:32:50,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:32:50,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696696606] [2024-06-21 19:32:50,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:32:50,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:32:50,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:32:50,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:32:50,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:32:50,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:32:50,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 360 transitions, 6491 flow. Second operand has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 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) [2024-06-21 19:32:50,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:32:50,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:32:50,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:32:53,569 INFO L124 PetriNetUnfolderBase]: 4376/6809 cut-off events. [2024-06-21 19:32:53,570 INFO L125 PetriNetUnfolderBase]: For 676896/676917 co-relation queries the response was YES. [2024-06-21 19:32:53,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65821 conditions, 6809 events. 4376/6809 cut-off events. For 676896/676917 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 39891 event pairs, 970 based on Foata normal form. 30/6834 useless extension candidates. Maximal degree in co-relation 65685. Up to 6426 conditions per place. [2024-06-21 19:32:53,649 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 329 selfloop transitions, 74 changer transitions 0/406 dead transitions. [2024-06-21 19:32:53,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 406 transitions, 7501 flow [2024-06-21 19:32:53,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:32:53,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:32:53,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 182 transitions. [2024-06-21 19:32:53,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3611111111111111 [2024-06-21 19:32:53,651 INFO L175 Difference]: Start difference. First operand has 275 places, 360 transitions, 6491 flow. Second operand 12 states and 182 transitions. [2024-06-21 19:32:53,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 406 transitions, 7501 flow [2024-06-21 19:32:54,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 406 transitions, 7333 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 19:32:54,855 INFO L231 Difference]: Finished difference. Result has 280 places, 361 transitions, 6539 flow [2024-06-21 19:32:54,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6323, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6539, PETRI_PLACES=280, PETRI_TRANSITIONS=361} [2024-06-21 19:32:54,855 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-21 19:32:54,856 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 361 transitions, 6539 flow [2024-06-21 19:32:54,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 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) [2024-06-21 19:32:54,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:32:54,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:32:54,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 19:32:54,860 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:32:54,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:32:54,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1619410598, now seen corresponding path program 5 times [2024-06-21 19:32:54,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:32:54,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857521950] [2024-06-21 19:32:54,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:32:54,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:32:54,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:33:03,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:33:03,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:33:03,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857521950] [2024-06-21 19:33:03,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857521950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:33:03,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:33:03,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:33:03,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437007973] [2024-06-21 19:33:03,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:33:03,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:33:03,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:33:03,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:33:03,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:33:04,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:33:04,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 361 transitions, 6539 flow. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:33:04,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:33:04,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:33:04,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:33:07,146 INFO L124 PetriNetUnfolderBase]: 4424/6893 cut-off events. [2024-06-21 19:33:07,146 INFO L125 PetriNetUnfolderBase]: For 698403/698424 co-relation queries the response was YES. [2024-06-21 19:33:07,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66631 conditions, 6893 events. 4424/6893 cut-off events. For 698403/698424 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 40563 event pairs, 994 based on Foata normal form. 30/6918 useless extension candidates. Maximal degree in co-relation 66494. Up to 6359 conditions per place. [2024-06-21 19:33:07,236 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 309 selfloop transitions, 87 changer transitions 0/399 dead transitions. [2024-06-21 19:33:07,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 399 transitions, 7517 flow [2024-06-21 19:33:07,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:33:07,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:33:07,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-21 19:33:07,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36428571428571427 [2024-06-21 19:33:07,239 INFO L175 Difference]: Start difference. First operand has 280 places, 361 transitions, 6539 flow. Second operand 10 states and 153 transitions. [2024-06-21 19:33:07,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 399 transitions, 7517 flow [2024-06-21 19:33:08,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 399 transitions, 7325 flow, removed 23 selfloop flow, removed 10 redundant places. [2024-06-21 19:33:08,461 INFO L231 Difference]: Finished difference. Result has 280 places, 362 transitions, 6591 flow [2024-06-21 19:33:08,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6347, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6591, PETRI_PLACES=280, PETRI_TRANSITIONS=362} [2024-06-21 19:33:08,462 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-21 19:33:08,462 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 362 transitions, 6591 flow [2024-06-21 19:33:08,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:33:08,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:33:08,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:33:08,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 19:33:08,463 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)] === [2024-06-21 19:33:08,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:33:08,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1246867658, now seen corresponding path program 2 times [2024-06-21 19:33:08,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:33:08,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702999692] [2024-06-21 19:33:08,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:33:08,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:33:08,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:33:14,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:33:14,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:33:14,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702999692] [2024-06-21 19:33:14,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702999692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:33:14,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:33:14,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:33:14,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681370596] [2024-06-21 19:33:14,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:33:14,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:33:14,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:33:14,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:33:14,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:33:14,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:33:14,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 362 transitions, 6591 flow. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:33:14,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:33:14,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:33:14,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:33:16,890 INFO L124 PetriNetUnfolderBase]: 4429/6898 cut-off events. [2024-06-21 19:33:16,890 INFO L125 PetriNetUnfolderBase]: For 692301/692310 co-relation queries the response was YES. [2024-06-21 19:33:16,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66823 conditions, 6898 events. 4429/6898 cut-off events. For 692301/692310 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 40592 event pairs, 1011 based on Foata normal form. 9/6904 useless extension candidates. Maximal degree in co-relation 66685. Up to 6825 conditions per place. [2024-06-21 19:33:16,963 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 347 selfloop transitions, 32 changer transitions 0/382 dead transitions. [2024-06-21 19:33:16,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 382 transitions, 7468 flow [2024-06-21 19:33:16,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:33:16,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:33:16,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-21 19:33:16,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36394557823129253 [2024-06-21 19:33:16,965 INFO L175 Difference]: Start difference. First operand has 280 places, 362 transitions, 6591 flow. Second operand 7 states and 107 transitions. [2024-06-21 19:33:16,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 382 transitions, 7468 flow [2024-06-21 19:33:18,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 382 transitions, 7248 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-21 19:33:18,260 INFO L231 Difference]: Finished difference. Result has 279 places, 366 transitions, 6523 flow [2024-06-21 19:33:18,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6371, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6523, PETRI_PLACES=279, PETRI_TRANSITIONS=366} [2024-06-21 19:33:18,260 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-21 19:33:18,260 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 366 transitions, 6523 flow [2024-06-21 19:33:18,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:33:18,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:33:18,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:33:18,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 19:33:18,261 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:33:18,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:33:18,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1790492854, now seen corresponding path program 1 times [2024-06-21 19:33:18,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:33:18,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874674056] [2024-06-21 19:33:18,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:33:18,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:33:18,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:33:24,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:33:24,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:33:24,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874674056] [2024-06-21 19:33:24,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874674056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:33:24,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:33:24,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:33:24,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142542050] [2024-06-21 19:33:24,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:33:24,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:33:24,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:33:24,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:33:24,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:33:24,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:33:24,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 366 transitions, 6523 flow. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:33:24,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:33:24,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:33:24,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:33:27,823 INFO L124 PetriNetUnfolderBase]: 4533/7048 cut-off events. [2024-06-21 19:33:27,823 INFO L125 PetriNetUnfolderBase]: For 738332/738350 co-relation queries the response was YES. [2024-06-21 19:33:27,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68197 conditions, 7048 events. 4533/7048 cut-off events. For 738332/738350 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 41531 event pairs, 1035 based on Foata normal form. 22/7059 useless extension candidates. Maximal degree in co-relation 68058. Up to 6346 conditions per place. [2024-06-21 19:33:27,892 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 304 selfloop transitions, 100 changer transitions 0/407 dead transitions. [2024-06-21 19:33:27,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 407 transitions, 8044 flow [2024-06-21 19:33:27,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:33:27,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:33:27,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 19:33:27,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 19:33:27,894 INFO L175 Difference]: Start difference. First operand has 279 places, 366 transitions, 6523 flow. Second operand 7 states and 126 transitions. [2024-06-21 19:33:27,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 407 transitions, 8044 flow [2024-06-21 19:33:29,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 407 transitions, 7953 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 19:33:29,025 INFO L231 Difference]: Finished difference. Result has 284 places, 378 transitions, 7012 flow [2024-06-21 19:33:29,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6432, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7012, PETRI_PLACES=284, PETRI_TRANSITIONS=378} [2024-06-21 19:33:29,026 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-21 19:33:29,026 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 378 transitions, 7012 flow [2024-06-21 19:33:29,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:33:29,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:33:29,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:33:29,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 19:33:29,027 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:33:29,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:33:29,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1652883226, now seen corresponding path program 6 times [2024-06-21 19:33:29,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:33:29,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717658370] [2024-06-21 19:33:29,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:33:29,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:33:29,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:33:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:33:37,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:33:37,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717658370] [2024-06-21 19:33:37,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717658370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:33:37,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:33:37,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:33:37,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870169272] [2024-06-21 19:33:37,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:33:37,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:33:37,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:33:37,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:33:37,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:33:37,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:33:37,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 378 transitions, 7012 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 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) [2024-06-21 19:33:37,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:33:37,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:33:37,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:33:40,375 INFO L124 PetriNetUnfolderBase]: 4601/7160 cut-off events. [2024-06-21 19:33:40,375 INFO L125 PetriNetUnfolderBase]: For 775972/775993 co-relation queries the response was YES. [2024-06-21 19:33:40,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70785 conditions, 7160 events. 4601/7160 cut-off events. For 775972/775993 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 42379 event pairs, 1015 based on Foata normal form. 30/7185 useless extension candidates. Maximal degree in co-relation 70642. Up to 6767 conditions per place. [2024-06-21 19:33:40,456 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 352 selfloop transitions, 63 changer transitions 0/418 dead transitions. [2024-06-21 19:33:40,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 418 transitions, 8042 flow [2024-06-21 19:33:40,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:33:40,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:33:40,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-21 19:33:40,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-21 19:33:40,459 INFO L175 Difference]: Start difference. First operand has 284 places, 378 transitions, 7012 flow. Second operand 9 states and 146 transitions. [2024-06-21 19:33:40,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 418 transitions, 8042 flow [2024-06-21 19:33:41,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 418 transitions, 7943 flow, removed 35 selfloop flow, removed 2 redundant places. [2024-06-21 19:33:41,746 INFO L231 Difference]: Finished difference. Result has 292 places, 381 transitions, 7126 flow [2024-06-21 19:33:41,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6913, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7126, PETRI_PLACES=292, PETRI_TRANSITIONS=381} [2024-06-21 19:33:41,747 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-21 19:33:41,747 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 381 transitions, 7126 flow [2024-06-21 19:33:41,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 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) [2024-06-21 19:33:41,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:33:41,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:33:41,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 19:33:41,747 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:33:41,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:33:41,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1838574544, now seen corresponding path program 7 times [2024-06-21 19:33:41,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:33:41,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897623604] [2024-06-21 19:33:41,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:33:41,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:33:41,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:33:49,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:33:49,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:33:49,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897623604] [2024-06-21 19:33:49,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897623604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:33:49,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:33:49,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:33:49,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136517227] [2024-06-21 19:33:49,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:33:49,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:33:49,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:33:49,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:33:49,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:33:49,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:33:49,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 381 transitions, 7126 flow. Second operand has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 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) [2024-06-21 19:33:49,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:33:49,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:33:49,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:33:52,872 INFO L124 PetriNetUnfolderBase]: 4649/7244 cut-off events. [2024-06-21 19:33:52,872 INFO L125 PetriNetUnfolderBase]: For 798699/798720 co-relation queries the response was YES. [2024-06-21 19:33:52,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71396 conditions, 7244 events. 4649/7244 cut-off events. For 798699/798720 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 43001 event pairs, 925 based on Foata normal form. 30/7269 useless extension candidates. Maximal degree in co-relation 71250. Up to 6784 conditions per place. [2024-06-21 19:33:52,947 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 359 selfloop transitions, 59 changer transitions 0/421 dead transitions. [2024-06-21 19:33:52,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 421 transitions, 8156 flow [2024-06-21 19:33:52,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:33:52,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:33:52,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 151 transitions. [2024-06-21 19:33:52,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3595238095238095 [2024-06-21 19:33:52,950 INFO L175 Difference]: Start difference. First operand has 292 places, 381 transitions, 7126 flow. Second operand 10 states and 151 transitions. [2024-06-21 19:33:52,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 421 transitions, 8156 flow [2024-06-21 19:33:54,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 421 transitions, 7970 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-21 19:33:54,215 INFO L231 Difference]: Finished difference. Result has 295 places, 382 transitions, 7132 flow [2024-06-21 19:33:54,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6940, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7132, PETRI_PLACES=295, PETRI_TRANSITIONS=382} [2024-06-21 19:33:54,216 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-21 19:33:54,216 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 382 transitions, 7132 flow [2024-06-21 19:33:54,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 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) [2024-06-21 19:33:54,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:33:54,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:33:54,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 19:33:54,217 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:33:54,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:33:54,217 INFO L85 PathProgramCache]: Analyzing trace with hash 558734072, now seen corresponding path program 8 times [2024-06-21 19:33:54,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:33:54,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179532833] [2024-06-21 19:33:54,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:33:54,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:33:54,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:34:02,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:34:02,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:34:02,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179532833] [2024-06-21 19:34:02,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179532833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:34:02,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:34:02,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:34:02,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466778546] [2024-06-21 19:34:02,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:34:02,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:34:02,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:34:02,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:34:02,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:34:02,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:34:02,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 382 transitions, 7132 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 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) [2024-06-21 19:34:02,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:34:02,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:34:02,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:34:06,701 INFO L124 PetriNetUnfolderBase]: 4898/7619 cut-off events. [2024-06-21 19:34:06,701 INFO L125 PetriNetUnfolderBase]: For 895423/895444 co-relation queries the response was YES. [2024-06-21 19:34:06,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76266 conditions, 7619 events. 4898/7619 cut-off events. For 895423/895444 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 45538 event pairs, 964 based on Foata normal form. 30/7644 useless extension candidates. Maximal degree in co-relation 76119. Up to 6189 conditions per place. [2024-06-21 19:34:06,779 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 324 selfloop transitions, 129 changer transitions 0/456 dead transitions. [2024-06-21 19:34:06,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 456 transitions, 8849 flow [2024-06-21 19:34:06,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:34:06,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:34:06,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 200 transitions. [2024-06-21 19:34:06,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-21 19:34:06,781 INFO L175 Difference]: Start difference. First operand has 295 places, 382 transitions, 7132 flow. Second operand 12 states and 200 transitions. [2024-06-21 19:34:06,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 456 transitions, 8849 flow [2024-06-21 19:34:08,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 456 transitions, 8681 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-21 19:34:08,244 INFO L231 Difference]: Finished difference. Result has 300 places, 390 transitions, 7446 flow [2024-06-21 19:34:08,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6964, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7446, PETRI_PLACES=300, PETRI_TRANSITIONS=390} [2024-06-21 19:34:08,245 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-21 19:34:08,245 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 390 transitions, 7446 flow [2024-06-21 19:34:08,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 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) [2024-06-21 19:34:08,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:34:08,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:34:08,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 19:34:08,246 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:34:08,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:34:08,246 INFO L85 PathProgramCache]: Analyzing trace with hash 558496922, now seen corresponding path program 9 times [2024-06-21 19:34:08,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:34:08,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577539395] [2024-06-21 19:34:08,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:34:08,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:34:08,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:34:16,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:34:16,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:34:16,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577539395] [2024-06-21 19:34:16,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577539395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:34:16,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:34:16,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:34:16,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020747964] [2024-06-21 19:34:16,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:34:16,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:34:16,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:34:16,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:34:16,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:34:16,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:34:16,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 390 transitions, 7446 flow. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:34:16,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:34:16,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:34:16,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:34:19,597 INFO L124 PetriNetUnfolderBase]: 4870/7575 cut-off events. [2024-06-21 19:34:19,598 INFO L125 PetriNetUnfolderBase]: For 895469/895490 co-relation queries the response was YES. [2024-06-21 19:34:19,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76550 conditions, 7575 events. 4870/7575 cut-off events. For 895469/895490 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 45232 event pairs, 1089 based on Foata normal form. 34/7604 useless extension candidates. Maximal degree in co-relation 76401. Up to 7099 conditions per place. [2024-06-21 19:34:19,689 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 351 selfloop transitions, 73 changer transitions 0/427 dead transitions. [2024-06-21 19:34:19,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 427 transitions, 8446 flow [2024-06-21 19:34:19,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:34:19,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:34:19,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 19:34:19,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 19:34:19,692 INFO L175 Difference]: Start difference. First operand has 300 places, 390 transitions, 7446 flow. Second operand 9 states and 153 transitions. [2024-06-21 19:34:19,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 427 transitions, 8446 flow [2024-06-21 19:34:21,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 427 transitions, 8203 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-21 19:34:21,633 INFO L231 Difference]: Finished difference. Result has 301 places, 390 transitions, 7360 flow [2024-06-21 19:34:21,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7203, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7360, PETRI_PLACES=301, PETRI_TRANSITIONS=390} [2024-06-21 19:34:21,634 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-21 19:34:21,634 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 390 transitions, 7360 flow [2024-06-21 19:34:21,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:34:21,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:34:21,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:34:21,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 19:34:21,634 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:34:21,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:34:21,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1190481778, now seen corresponding path program 2 times [2024-06-21 19:34:21,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:34:21,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218394291] [2024-06-21 19:34:21,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:34:21,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:34:21,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:34:29,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:34:29,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:34:29,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218394291] [2024-06-21 19:34:29,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218394291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:34:29,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:34:29,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:34:29,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976618188] [2024-06-21 19:34:29,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:34:29,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:34:29,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:34:29,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:34:29,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:34:29,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:34:29,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 390 transitions, 7360 flow. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:34:29,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:34:29,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:34:29,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:34:32,979 INFO L124 PetriNetUnfolderBase]: 4822/7498 cut-off events. [2024-06-21 19:34:32,980 INFO L125 PetriNetUnfolderBase]: For 874828/874849 co-relation queries the response was YES. [2024-06-21 19:34:33,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73732 conditions, 7498 events. 4822/7498 cut-off events. For 874828/874849 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 44707 event pairs, 971 based on Foata normal form. 50/7543 useless extension candidates. Maximal degree in co-relation 73582. Up to 6359 conditions per place. [2024-06-21 19:34:33,056 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 289 selfloop transitions, 148 changer transitions 0/440 dead transitions. [2024-06-21 19:34:33,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 440 transitions, 8758 flow [2024-06-21 19:34:33,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:34:33,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:34:33,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-21 19:34:33,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-21 19:34:33,058 INFO L175 Difference]: Start difference. First operand has 301 places, 390 transitions, 7360 flow. Second operand 8 states and 162 transitions. [2024-06-21 19:34:33,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 440 transitions, 8758 flow [2024-06-21 19:34:34,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 440 transitions, 8600 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 19:34:34,769 INFO L231 Difference]: Finished difference. Result has 304 places, 393 transitions, 7684 flow [2024-06-21 19:34:34,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7202, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7684, PETRI_PLACES=304, PETRI_TRANSITIONS=393} [2024-06-21 19:34:34,770 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-21 19:34:34,770 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 393 transitions, 7684 flow [2024-06-21 19:34:34,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:34:34,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:34:34,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:34:34,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 19:34:34,771 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:34:34,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:34:34,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1190666104, now seen corresponding path program 10 times [2024-06-21 19:34:34,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:34:34,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753086055] [2024-06-21 19:34:34,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:34:34,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:34:34,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:34:42,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:34:42,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:34:42,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753086055] [2024-06-21 19:34:42,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753086055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:34:42,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:34:42,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:34:42,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865177866] [2024-06-21 19:34:42,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:34:42,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:34:42,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:34:42,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:34:42,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:34:42,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:34:42,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 393 transitions, 7684 flow. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:34:42,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:34:42,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:34:42,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:34:45,912 INFO L124 PetriNetUnfolderBase]: 4815/7485 cut-off events. [2024-06-21 19:34:45,912 INFO L125 PetriNetUnfolderBase]: For 833654/833675 co-relation queries the response was YES. [2024-06-21 19:34:45,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74662 conditions, 7485 events. 4815/7485 cut-off events. For 833654/833675 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 44553 event pairs, 946 based on Foata normal form. 30/7510 useless extension candidates. Maximal degree in co-relation 74511. Up to 6575 conditions per place. [2024-06-21 19:34:45,985 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 300 selfloop transitions, 138 changer transitions 0/441 dead transitions. [2024-06-21 19:34:45,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 441 transitions, 8910 flow [2024-06-21 19:34:45,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:34:45,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:34:45,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 19:34:45,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 19:34:45,987 INFO L175 Difference]: Start difference. First operand has 304 places, 393 transitions, 7684 flow. Second operand 8 states and 156 transitions. [2024-06-21 19:34:45,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 441 transitions, 8910 flow [2024-06-21 19:34:47,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 441 transitions, 8761 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 19:34:47,449 INFO L231 Difference]: Finished difference. Result has 305 places, 394 transitions, 7832 flow [2024-06-21 19:34:47,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7403, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7832, PETRI_PLACES=305, PETRI_TRANSITIONS=394} [2024-06-21 19:34:47,449 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-21 19:34:47,449 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 394 transitions, 7832 flow [2024-06-21 19:34:47,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:34:47,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:34:47,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:34:47,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 19:34:47,450 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)] === [2024-06-21 19:34:47,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:34:47,450 INFO L85 PathProgramCache]: Analyzing trace with hash -728918240, now seen corresponding path program 2 times [2024-06-21 19:34:47,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:34:47,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372690725] [2024-06-21 19:34:47,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:34:47,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:34:47,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:34:54,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:34:54,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:34:54,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372690725] [2024-06-21 19:34:54,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372690725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:34:54,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:34:54,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:34:54,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127157810] [2024-06-21 19:34:54,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:34:54,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:34:54,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:34:54,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:34:54,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:34:54,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:34:54,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 394 transitions, 7832 flow. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:34:54,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:34:54,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:34:54,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:34:57,334 INFO L124 PetriNetUnfolderBase]: 4927/7644 cut-off events. [2024-06-21 19:34:57,335 INFO L125 PetriNetUnfolderBase]: For 883874/883877 co-relation queries the response was YES. [2024-06-21 19:34:57,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78227 conditions, 7644 events. 4927/7644 cut-off events. For 883874/883877 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 45678 event pairs, 1064 based on Foata normal form. 10/7651 useless extension candidates. Maximal degree in co-relation 78074. Up to 7321 conditions per place. [2024-06-21 19:34:57,432 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 381 selfloop transitions, 44 changer transitions 0/428 dead transitions. [2024-06-21 19:34:57,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 428 transitions, 9362 flow [2024-06-21 19:34:57,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:34:57,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:34:57,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 131 transitions. [2024-06-21 19:34:57,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34656084656084657 [2024-06-21 19:34:57,433 INFO L175 Difference]: Start difference. First operand has 305 places, 394 transitions, 7832 flow. Second operand 9 states and 131 transitions. [2024-06-21 19:34:57,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 428 transitions, 9362 flow [2024-06-21 19:34:59,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 428 transitions, 9164 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 19:34:59,251 INFO L231 Difference]: Finished difference. Result has 309 places, 404 transitions, 7987 flow [2024-06-21 19:34:59,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7634, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7987, PETRI_PLACES=309, PETRI_TRANSITIONS=404} [2024-06-21 19:34:59,252 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-21 19:34:59,254 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 404 transitions, 7987 flow [2024-06-21 19:34:59,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:34:59,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:34:59,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:34:59,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 19:34:59,255 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)] === [2024-06-21 19:34:59,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:34:59,255 INFO L85 PathProgramCache]: Analyzing trace with hash -728918612, now seen corresponding path program 3 times [2024-06-21 19:34:59,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:34:59,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298017624] [2024-06-21 19:34:59,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:34:59,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:34:59,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:35:05,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:35:05,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:35:05,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298017624] [2024-06-21 19:35:05,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298017624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:35:05,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:35:05,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:35:05,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742166884] [2024-06-21 19:35:05,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:35:05,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:35:05,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:35:05,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:35:05,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:35:05,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:35:05,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 404 transitions, 7987 flow. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:35:05,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:35:05,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:35:05,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:35:08,902 INFO L124 PetriNetUnfolderBase]: 4929/7646 cut-off events. [2024-06-21 19:35:08,903 INFO L125 PetriNetUnfolderBase]: For 878856/878856 co-relation queries the response was YES. [2024-06-21 19:35:08,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78183 conditions, 7646 events. 4929/7646 cut-off events. For 878856/878856 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 45532 event pairs, 1120 based on Foata normal form. 2/7646 useless extension candidates. Maximal degree in co-relation 78028. Up to 7600 conditions per place. [2024-06-21 19:35:08,998 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 397 selfloop transitions, 24 changer transitions 0/424 dead transitions. [2024-06-21 19:35:08,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 424 transitions, 9032 flow [2024-06-21 19:35:09,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:35:09,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:35:09,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 105 transitions. [2024-06-21 19:35:09,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3125 [2024-06-21 19:35:09,000 INFO L175 Difference]: Start difference. First operand has 309 places, 404 transitions, 7987 flow. Second operand 8 states and 105 transitions. [2024-06-21 19:35:09,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 424 transitions, 9032 flow [2024-06-21 19:35:11,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 424 transitions, 8917 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-21 19:35:11,090 INFO L231 Difference]: Finished difference. Result has 315 places, 413 transitions, 8133 flow [2024-06-21 19:35:11,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7873, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8133, PETRI_PLACES=315, PETRI_TRANSITIONS=413} [2024-06-21 19:35:11,091 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-21 19:35:11,091 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 413 transitions, 8133 flow [2024-06-21 19:35:11,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:35:11,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:35:11,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:35:11,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 19:35:11,091 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:35:11,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:35:11,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1022411604, now seen corresponding path program 4 times [2024-06-21 19:35:11,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:35:11,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075495798] [2024-06-21 19:35:11,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:35:11,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:35:11,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:35:17,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:35:17,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:35:17,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075495798] [2024-06-21 19:35:17,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075495798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:35:17,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:35:17,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:35:17,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279998998] [2024-06-21 19:35:17,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:35:17,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:35:17,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:35:17,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:35:17,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:35:17,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:35:17,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 413 transitions, 8133 flow. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:35:17,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:35:17,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:35:17,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:35:20,743 INFO L124 PetriNetUnfolderBase]: 4963/7695 cut-off events. [2024-06-21 19:35:20,743 INFO L125 PetriNetUnfolderBase]: For 874545/874553 co-relation queries the response was YES. [2024-06-21 19:35:20,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79066 conditions, 7695 events. 4963/7695 cut-off events. For 874545/874553 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 45820 event pairs, 1092 based on Foata normal form. 9/7702 useless extension candidates. Maximal degree in co-relation 78907. Up to 7551 conditions per place. [2024-06-21 19:35:20,841 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 403 selfloop transitions, 59 changer transitions 0/465 dead transitions. [2024-06-21 19:35:20,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 465 transitions, 9758 flow [2024-06-21 19:35:20,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:35:20,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:35:20,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 19:35:20,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-21 19:35:20,844 INFO L175 Difference]: Start difference. First operand has 315 places, 413 transitions, 8133 flow. Second operand 8 states and 131 transitions. [2024-06-21 19:35:20,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 465 transitions, 9758 flow [2024-06-21 19:35:22,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 465 transitions, 9672 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-21 19:35:22,820 INFO L231 Difference]: Finished difference. Result has 322 places, 433 transitions, 8695 flow [2024-06-21 19:35:22,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8047, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8695, PETRI_PLACES=322, PETRI_TRANSITIONS=433} [2024-06-21 19:35:22,824 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-21 19:35:22,824 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 433 transitions, 8695 flow [2024-06-21 19:35:22,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:35:22,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:35:22,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:35:22,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 19:35:22,825 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:35:22,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:35:22,825 INFO L85 PathProgramCache]: Analyzing trace with hash 391855754, now seen corresponding path program 5 times [2024-06-21 19:35:22,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:35:22,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203741088] [2024-06-21 19:35:22,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:35:22,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:35:22,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:35:28,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:35:28,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:35:28,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203741088] [2024-06-21 19:35:28,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203741088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:35:28,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:35:28,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:35:28,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253291186] [2024-06-21 19:35:28,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:35:28,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:35:28,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:35:28,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:35:28,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:35:28,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:35:28,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 433 transitions, 8695 flow. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:35:28,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:35:28,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:35:28,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:35:31,814 INFO L124 PetriNetUnfolderBase]: 4993/7739 cut-off events. [2024-06-21 19:35:31,814 INFO L125 PetriNetUnfolderBase]: For 897174/897186 co-relation queries the response was YES. [2024-06-21 19:35:31,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80741 conditions, 7739 events. 4993/7739 cut-off events. For 897174/897186 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 46080 event pairs, 1094 based on Foata normal form. 13/7750 useless extension candidates. Maximal degree in co-relation 80579. Up to 7626 conditions per place. [2024-06-21 19:35:31,913 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 425 selfloop transitions, 53 changer transitions 0/481 dead transitions. [2024-06-21 19:35:31,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 481 transitions, 10359 flow [2024-06-21 19:35:31,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:35:31,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:35:31,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 19:35:31,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-21 19:35:31,915 INFO L175 Difference]: Start difference. First operand has 322 places, 433 transitions, 8695 flow. Second operand 8 states and 130 transitions. [2024-06-21 19:35:31,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 481 transitions, 10359 flow [2024-06-21 19:35:34,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 481 transitions, 10247 flow, removed 55 selfloop flow, removed 1 redundant places. [2024-06-21 19:35:34,363 INFO L231 Difference]: Finished difference. Result has 330 places, 450 transitions, 9220 flow [2024-06-21 19:35:34,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8635, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9220, PETRI_PLACES=330, PETRI_TRANSITIONS=450} [2024-06-21 19:35:34,364 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-21 19:35:34,364 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 450 transitions, 9220 flow [2024-06-21 19:35:34,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:35:34,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:35:34,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:35:34,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 19:35:34,365 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:35:34,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:35:34,365 INFO L85 PathProgramCache]: Analyzing trace with hash 435543434, now seen corresponding path program 6 times [2024-06-21 19:35:34,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:35:34,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550138152] [2024-06-21 19:35:34,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:35:34,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:35:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:35:40,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:35:40,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:35:40,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550138152] [2024-06-21 19:35:40,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550138152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:35:40,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:35:40,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:35:40,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454506355] [2024-06-21 19:35:40,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:35:40,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:35:40,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:35:40,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:35:40,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:35:40,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-06-21 19:35:40,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 450 transitions, 9220 flow. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:35:40,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:35:40,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-06-21 19:35:40,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:35:44,321 INFO L124 PetriNetUnfolderBase]: 4990/7735 cut-off events. [2024-06-21 19:35:44,321 INFO L125 PetriNetUnfolderBase]: For 915777/915789 co-relation queries the response was YES. [2024-06-21 19:35:44,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81049 conditions, 7735 events. 4990/7735 cut-off events. For 915777/915789 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 46004 event pairs, 1093 based on Foata normal form. 13/7746 useless extension candidates. Maximal degree in co-relation 80883. Up to 7657 conditions per place. [2024-06-21 19:35:44,439 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 434 selfloop transitions, 37 changer transitions 0/474 dead transitions. [2024-06-21 19:35:44,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 474 transitions, 10234 flow [2024-06-21 19:35:44,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:35:44,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:35:44,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-21 19:35:44,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-21 19:35:44,441 INFO L175 Difference]: Start difference. First operand has 330 places, 450 transitions, 9220 flow. Second operand 8 states and 121 transitions. [2024-06-21 19:35:44,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 474 transitions, 10234 flow [2024-06-21 19:35:46,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 474 transitions, 10097 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-21 19:35:47,006 INFO L231 Difference]: Finished difference. Result has 334 places, 450 transitions, 9167 flow [2024-06-21 19:35:47,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9083, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9167, PETRI_PLACES=334, PETRI_TRANSITIONS=450} [2024-06-21 19:35:47,006 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 291 predicate places. [2024-06-21 19:35:47,007 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 450 transitions, 9167 flow [2024-06-21 19:35:47,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:35:47,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:35:47,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:35:47,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 19:35:47,007 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:35:47,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:35:47,008 INFO L85 PathProgramCache]: Analyzing trace with hash 434159966, now seen corresponding path program 3 times [2024-06-21 19:35:47,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:35:47,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195177958] [2024-06-21 19:35:47,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:35:47,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:35:47,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15