./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe021_power.opt_pso.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/safe021_power.opt_pso.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/safe021_power.opt_pso.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe021_power.opt_pso.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 19:40:18,897 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 19:40:18,967 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 19:40:18,972 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 19:40:18,972 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 19:40:18,991 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 19:40:18,991 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 19:40:18,992 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 19:40:18,992 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 19:40:18,992 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 19:40:18,993 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 19:40:18,993 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 19:40:18,994 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 19:40:18,994 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 19:40:18,994 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 19:40:18,995 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 19:40:18,995 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 19:40:18,996 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 19:40:18,996 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 19:40:18,996 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 19:40:18,997 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 19:40:19,000 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 19:40:19,000 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 19:40:19,000 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 19:40:19,001 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 19:40:19,001 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 19:40:19,001 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 19:40:19,002 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 19:40:19,002 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 19:40:19,002 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 19:40:19,003 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 19:40:19,003 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 19:40:19,003 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 19:40:19,004 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 19:40:19,004 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 19:40:19,004 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 19:40:19,004 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 19:40:19,005 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 19:40:19,005 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 19:40:19,005 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 19:40:19,005 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 19:40:19,006 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 19:40:19,006 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 19:40:19,006 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 19:40:19,271 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 19:40:19,297 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 19:40:19,299 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 19:40:19,300 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 19:40:19,301 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 19:40:19,302 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe021_power.opt_pso.opt.i [2024-06-21 19:40:20,428 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 19:40:20,693 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 19:40:20,694 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe021_power.opt_pso.opt.i [2024-06-21 19:40:20,717 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d27702ca/a3ec7c4b791240b5862d2d7deae28f4c/FLAGd2f5a8164 [2024-06-21 19:40:20,730 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d27702ca/a3ec7c4b791240b5862d2d7deae28f4c [2024-06-21 19:40:20,732 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 19:40:20,732 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 19:40:20,733 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe021_power.opt_pso.opt.yml/witness.yml [2024-06-21 19:40:20,824 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 19:40:20,826 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 19:40:20,829 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 19:40:20,829 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 19:40:20,833 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 19:40:20,834 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 07:40:20" (1/2) ... [2024-06-21 19:40:20,835 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bea94b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:40:20, skipping insertion in model container [2024-06-21 19:40:20,835 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 07:40:20" (1/2) ... [2024-06-21 19:40:20,838 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@38f8bf37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:40:20, skipping insertion in model container [2024-06-21 19:40:20,838 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:40:20" (2/2) ... [2024-06-21 19:40:20,839 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bea94b0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:40:20, skipping insertion in model container [2024-06-21 19:40:20,839 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:40:20" (2/2) ... [2024-06-21 19:40:20,839 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 19:40:20,869 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 19:40:20,870 INFO L97 edCorrectnessWitness]: Location invariant before [L823-L823] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL && (0LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (0LL - (long long )x$r_buff0_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL - (long long )x) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )x) + (long long )x$w_buff0 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )z >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$r_buff1_thd2 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$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$w_buff0_used - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff1 - (long long )x$w_buff1_used >= 0LL) [2024-06-21 19:40:20,871 INFO L97 edCorrectnessWitness]: Location invariant before [L825-L825] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL && (0LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (0LL - (long long )x$r_buff0_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL - (long long )x) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )x) + (long long )x$w_buff0 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )z >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$r_buff1_thd2 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$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$w_buff0_used - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff1 - (long long )x$w_buff1_used >= 0LL) [2024-06-21 19:40:20,871 INFO L97 edCorrectnessWitness]: Location invariant before [L826-L826] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL && (0LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (0LL - (long long )x$r_buff0_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL - (long long )x) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )x) + (long long )x$w_buff0 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )z >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$r_buff1_thd2 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$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$w_buff0_used - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff1 - (long long )x$w_buff1_used >= 0LL) [2024-06-21 19:40:20,871 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 19:40:20,871 INFO L106 edCorrectnessWitness]: ghost_update [L821-L821] multithreaded = 1; [2024-06-21 19:40:20,918 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 19:40:21,295 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 19:40:21,307 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 19:40:21,531 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 19:40:21,567 INFO L206 MainTranslator]: Completed translation [2024-06-21 19:40:21,567 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:40:21 WrapperNode [2024-06-21 19:40:21,567 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 19:40:21,568 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 19:40:21,569 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 19:40:21,569 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 19:40:21,575 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:40:21" (1/1) ... [2024-06-21 19:40:21,608 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:40:21" (1/1) ... [2024-06-21 19:40:21,657 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 144 [2024-06-21 19:40:21,658 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 19:40:21,658 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 19:40:21,658 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 19:40:21,658 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 19:40:21,670 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:40:21" (1/1) ... [2024-06-21 19:40:21,670 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:40:21" (1/1) ... [2024-06-21 19:40:21,674 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:40:21" (1/1) ... [2024-06-21 19:40:21,692 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 19:40:21,693 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:40:21" (1/1) ... [2024-06-21 19:40:21,693 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:40:21" (1/1) ... [2024-06-21 19:40:21,704 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:40:21" (1/1) ... [2024-06-21 19:40:21,706 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:40:21" (1/1) ... [2024-06-21 19:40:21,710 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:40:21" (1/1) ... [2024-06-21 19:40:21,712 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:40:21" (1/1) ... [2024-06-21 19:40:21,718 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 19:40:21,718 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 19:40:21,719 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 19:40:21,719 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 19:40:21,719 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:40:21" (1/1) ... [2024-06-21 19:40:21,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 19:40:21,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 19:40:21,769 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 19:40:21,795 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 19:40:21,812 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 19:40:21,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 19:40:21,813 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 19:40:21,813 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 19:40:21,814 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 19:40:21,814 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 19:40:21,814 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 19:40:21,814 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 19:40:21,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 19:40:21,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 19:40:21,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 19:40:21,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 19:40:21,817 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 19:40:21,986 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 19:40:21,989 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 19:40:22,405 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 19:40:22,406 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 19:40:22,610 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 19:40:22,610 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 19:40:22,611 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 07:40:22 BoogieIcfgContainer [2024-06-21 19:40:22,611 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 19:40:22,613 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 19:40:22,613 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 19:40:22,616 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 19:40:22,616 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 07:40:20" (1/4) ... [2024-06-21 19:40:22,618 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4197a902 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 07:40:22, skipping insertion in model container [2024-06-21 19:40:22,618 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:40:20" (2/4) ... [2024-06-21 19:40:22,618 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4197a902 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 07:40:22, skipping insertion in model container [2024-06-21 19:40:22,618 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:40:21" (3/4) ... [2024-06-21 19:40:22,621 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4197a902 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 07:40:22, skipping insertion in model container [2024-06-21 19:40:22,621 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 07:40:22" (4/4) ... [2024-06-21 19:40:22,622 INFO L112 eAbstractionObserver]: Analyzing ICFG safe021_power.opt_pso.opt.i [2024-06-21 19:40:22,637 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 19:40:22,638 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 19:40:22,638 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 19:40:22,691 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 19:40:22,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 19:40:22,760 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-21 19:40:22,761 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 19:40:22,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 64 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 19:40:22,763 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 19:40:22,766 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-21 19:40:22,779 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 19:40:22,786 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;@1deec476, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 19:40:22,786 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 19:40:22,792 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 19:40:22,792 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 19:40:22,793 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 19:40:22,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:22,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 19:40:22,794 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 19:40:22,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:22,802 INFO L85 PathProgramCache]: Analyzing trace with hash 372110564, now seen corresponding path program 1 times [2024-06-21 19:40:22,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:22,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847772535] [2024-06-21 19:40:22,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:22,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:23,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:24,033 INFO 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 19:40:24,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:24,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847772535] [2024-06-21 19:40:24,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847772535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:24,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:24,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 19:40:24,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765842820] [2024-06-21 19:40:24,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:24,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 19:40:24,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:24,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 19:40:24,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 19:40:24,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-21 19:40:24,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:24,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:24,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-21 19:40:24,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:24,570 INFO L124 PetriNetUnfolderBase]: 1152/1755 cut-off events. [2024-06-21 19:40:24,570 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-21 19:40:24,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3595 conditions, 1755 events. 1152/1755 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8178 event pairs, 794 based on Foata normal form. 2/1710 useless extension candidates. Maximal degree in co-relation 3583. Up to 1738 conditions per place. [2024-06-21 19:40:24,587 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 32 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-21 19:40:24,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 42 transitions, 171 flow [2024-06-21 19:40:24,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 19:40:24,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 19:40:24,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-21 19:40:24,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 19:40:24,600 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 72 transitions. [2024-06-21 19:40:24,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 42 transitions, 171 flow [2024-06-21 19:40:24,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 42 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 19:40:24,606 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-21 19:40:24,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-21 19:40:24,610 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-21 19:40:24,610 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-21 19:40:24,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:24,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:24,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:24,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 19:40:24,611 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 19:40:24,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:24,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1117077401, now seen corresponding path program 1 times [2024-06-21 19:40:24,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:24,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389130159] [2024-06-21 19:40:24,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:24,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:24,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:25,426 INFO 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 19:40:25,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:25,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389130159] [2024-06-21 19:40:25,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389130159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:25,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:25,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 19:40:25,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515987897] [2024-06-21 19:40:25,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:25,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 19:40:25,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:25,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 19:40:25,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 19:40:25,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 19:40:25,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:25,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:25,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 19:40:25,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:25,901 INFO L124 PetriNetUnfolderBase]: 1395/2101 cut-off events. [2024-06-21 19:40:25,902 INFO L125 PetriNetUnfolderBase]: For 316/316 co-relation queries the response was YES. [2024-06-21 19:40:25,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4853 conditions, 2101 events. 1395/2101 cut-off events. For 316/316 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9517 event pairs, 862 based on Foata normal form. 3/2102 useless extension candidates. Maximal degree in co-relation 4841. Up to 2073 conditions per place. [2024-06-21 19:40:25,915 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 42 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-21 19:40:25,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 54 transitions, 252 flow [2024-06-21 19:40:25,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 19:40:25,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 19:40:25,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2024-06-21 19:40:25,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55625 [2024-06-21 19:40:25,917 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 89 transitions. [2024-06-21 19:40:25,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 54 transitions, 252 flow [2024-06-21 19:40:25,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 54 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 19:40:25,919 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 150 flow [2024-06-21 19:40:25,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-06-21 19:40:25,920 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-06-21 19:40:25,921 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 150 flow [2024-06-21 19:40:25,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:25,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:25,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:25,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 19:40:25,922 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 19:40:25,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:25,922 INFO L85 PathProgramCache]: Analyzing trace with hash 269662507, now seen corresponding path program 1 times [2024-06-21 19:40:25,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:25,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309911320] [2024-06-21 19:40:25,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:25,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:25,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:26,694 INFO 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 19:40:26,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:26,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309911320] [2024-06-21 19:40:26,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309911320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:26,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:26,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:40:26,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082599329] [2024-06-21 19:40:26,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:26,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:40:26,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:26,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:40:26,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:40:26,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 19:40:26,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 150 flow. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:26,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:26,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 19:40:26,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:27,168 INFO L124 PetriNetUnfolderBase]: 1383/2083 cut-off events. [2024-06-21 19:40:27,168 INFO L125 PetriNetUnfolderBase]: For 1050/1058 co-relation queries the response was YES. [2024-06-21 19:40:27,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5360 conditions, 2083 events. 1383/2083 cut-off events. For 1050/1058 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9484 event pairs, 612 based on Foata normal form. 12/2093 useless extension candidates. Maximal degree in co-relation 5345. Up to 2025 conditions per place. [2024-06-21 19:40:27,183 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 50 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-21 19:40:27,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 65 transitions, 338 flow [2024-06-21 19:40:27,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:40:27,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:40:27,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-06-21 19:40:27,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-21 19:40:27,190 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 150 flow. Second operand 5 states and 110 transitions. [2024-06-21 19:40:27,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 65 transitions, 338 flow [2024-06-21 19:40:27,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 65 transitions, 336 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-21 19:40:27,198 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 196 flow [2024-06-21 19:40:27,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=196, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-21 19:40:27,200 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2024-06-21 19:40:27,200 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 196 flow [2024-06-21 19:40:27,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:27,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:27,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:27,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 19:40:27,201 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 19:40:27,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:27,202 INFO L85 PathProgramCache]: Analyzing trace with hash -265907840, now seen corresponding path program 1 times [2024-06-21 19:40:27,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:27,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209856848] [2024-06-21 19:40:27,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:27,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:27,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:28,478 INFO 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 19:40:28,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:28,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209856848] [2024-06-21 19:40:28,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209856848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:28,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:28,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:40:28,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554510723] [2024-06-21 19:40:28,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:28,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:40:28,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:28,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:40:28,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:40:28,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 19:40:28,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 196 flow. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 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 19:40:28,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:28,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 19:40:28,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:28,968 INFO L124 PetriNetUnfolderBase]: 1374/2068 cut-off events. [2024-06-21 19:40:28,968 INFO L125 PetriNetUnfolderBase]: For 1915/1923 co-relation queries the response was YES. [2024-06-21 19:40:28,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5859 conditions, 2068 events. 1374/2068 cut-off events. For 1915/1923 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9324 event pairs, 472 based on Foata normal form. 12/2078 useless extension candidates. Maximal degree in co-relation 5841. Up to 1980 conditions per place. [2024-06-21 19:40:28,981 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 54 selfloop transitions, 12 changer transitions 0/71 dead transitions. [2024-06-21 19:40:28,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 71 transitions, 402 flow [2024-06-21 19:40:28,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:40:28,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:40:28,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-21 19:40:28,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-21 19:40:28,983 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 196 flow. Second operand 6 states and 126 transitions. [2024-06-21 19:40:28,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 71 transitions, 402 flow [2024-06-21 19:40:28,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 71 transitions, 380 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 19:40:28,987 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 215 flow [2024-06-21 19:40:28,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=215, PETRI_PLACES=52, PETRI_TRANSITIONS=44} [2024-06-21 19:40:28,988 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 11 predicate places. [2024-06-21 19:40:28,988 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 215 flow [2024-06-21 19:40:28,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 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 19:40:28,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:28,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:28,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 19:40:28,989 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:40:28,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:28,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1195026544, now seen corresponding path program 1 times [2024-06-21 19:40:28,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:28,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938280983] [2024-06-21 19:40:28,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:28,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:29,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:30,005 INFO 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 19:40:30,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:30,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938280983] [2024-06-21 19:40:30,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938280983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:30,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:30,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:40:30,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846548155] [2024-06-21 19:40:30,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:30,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:40:30,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:30,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:40:30,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:40:30,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:40:30,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 215 flow. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:30,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:30,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:40:30,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:30,503 INFO L124 PetriNetUnfolderBase]: 1374/2099 cut-off events. [2024-06-21 19:40:30,503 INFO L125 PetriNetUnfolderBase]: For 3162/3179 co-relation queries the response was YES. [2024-06-21 19:40:30,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6251 conditions, 2099 events. 1374/2099 cut-off events. For 3162/3179 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9731 event pairs, 916 based on Foata normal form. 5/2085 useless extension candidates. Maximal degree in co-relation 6231. Up to 2040 conditions per place. [2024-06-21 19:40:30,519 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 46 selfloop transitions, 13 changer transitions 0/63 dead transitions. [2024-06-21 19:40:30,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 63 transitions, 401 flow [2024-06-21 19:40:30,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:40:30,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:40:30,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-21 19:40:30,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44 [2024-06-21 19:40:30,521 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 215 flow. Second operand 5 states and 88 transitions. [2024-06-21 19:40:30,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 63 transitions, 401 flow [2024-06-21 19:40:30,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 63 transitions, 368 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 19:40:30,531 INFO L231 Difference]: Finished difference. Result has 55 places, 53 transitions, 285 flow [2024-06-21 19:40:30,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=285, PETRI_PLACES=55, PETRI_TRANSITIONS=53} [2024-06-21 19:40:30,533 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2024-06-21 19:40:30,533 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 53 transitions, 285 flow [2024-06-21 19:40:30,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:30,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:30,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:30,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 19:40:30,539 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 19:40:30,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:30,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1608883590, now seen corresponding path program 1 times [2024-06-21 19:40:30,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:30,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178119634] [2024-06-21 19:40:30,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:30,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:30,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:31,700 INFO 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 19:40:31,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:31,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178119634] [2024-06-21 19:40:31,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178119634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:31,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:31,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:40:31,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215518689] [2024-06-21 19:40:31,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:31,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:40:31,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:31,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:40:31,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:40:31,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:40:31,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 53 transitions, 285 flow. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:31,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:31,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:40:31,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:32,252 INFO L124 PetriNetUnfolderBase]: 1601/2407 cut-off events. [2024-06-21 19:40:32,252 INFO L125 PetriNetUnfolderBase]: For 4433/4433 co-relation queries the response was YES. [2024-06-21 19:40:32,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7724 conditions, 2407 events. 1601/2407 cut-off events. For 4433/4433 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10976 event pairs, 1073 based on Foata normal form. 2/2408 useless extension candidates. Maximal degree in co-relation 7699. Up to 2363 conditions per place. [2024-06-21 19:40:32,268 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 60 selfloop transitions, 13 changer transitions 0/76 dead transitions. [2024-06-21 19:40:32,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 76 transitions, 515 flow [2024-06-21 19:40:32,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:40:32,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:40:32,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-21 19:40:32,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 19:40:32,270 INFO L175 Difference]: Start difference. First operand has 55 places, 53 transitions, 285 flow. Second operand 6 states and 96 transitions. [2024-06-21 19:40:32,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 76 transitions, 515 flow [2024-06-21 19:40:32,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 76 transitions, 505 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-06-21 19:40:32,279 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 381 flow [2024-06-21 19:40:32,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=381, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2024-06-21 19:40:32,282 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 22 predicate places. [2024-06-21 19:40:32,282 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 381 flow [2024-06-21 19:40:32,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:32,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:32,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:32,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 19:40:32,283 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 19:40:32,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:32,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1337309475, now seen corresponding path program 1 times [2024-06-21 19:40:32,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:32,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146440893] [2024-06-21 19:40:32,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:32,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:32,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:33,265 INFO 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 19:40:33,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:33,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146440893] [2024-06-21 19:40:33,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146440893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:33,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:33,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:40:33,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182172841] [2024-06-21 19:40:33,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:33,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:40:33,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:33,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:40:33,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:40:33,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:40:33,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 381 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:33,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:33,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:40:33,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:33,864 INFO L124 PetriNetUnfolderBase]: 1560/2372 cut-off events. [2024-06-21 19:40:33,865 INFO L125 PetriNetUnfolderBase]: For 6696/6712 co-relation queries the response was YES. [2024-06-21 19:40:33,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8444 conditions, 2372 events. 1560/2372 cut-off events. For 6696/6712 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 11024 event pairs, 895 based on Foata normal form. 8/2356 useless extension candidates. Maximal degree in co-relation 8412. Up to 2290 conditions per place. [2024-06-21 19:40:33,893 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 64 selfloop transitions, 19 changer transitions 0/90 dead transitions. [2024-06-21 19:40:33,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 90 transitions, 642 flow [2024-06-21 19:40:33,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:40:33,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:40:33,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 19:40:33,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 19:40:33,895 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 381 flow. Second operand 7 states and 119 transitions. [2024-06-21 19:40:33,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 90 transitions, 642 flow [2024-06-21 19:40:33,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 90 transitions, 635 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-21 19:40:33,904 INFO L231 Difference]: Finished difference. Result has 70 places, 70 transitions, 479 flow [2024-06-21 19:40:33,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=479, PETRI_PLACES=70, PETRI_TRANSITIONS=70} [2024-06-21 19:40:33,905 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 29 predicate places. [2024-06-21 19:40:33,905 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 70 transitions, 479 flow [2024-06-21 19:40:33,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:33,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:33,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:33,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 19:40:33,906 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 19:40:33,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:33,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1669937297, now seen corresponding path program 2 times [2024-06-21 19:40:33,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:33,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548537533] [2024-06-21 19:40:33,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:33,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:33,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:34,933 INFO 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 19:40:34,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:34,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548537533] [2024-06-21 19:40:34,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548537533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:34,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:34,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:40:34,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508743051] [2024-06-21 19:40:34,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:34,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:40:34,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:34,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:40:34,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:40:34,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:40:34,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 70 transitions, 479 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:34,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:34,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:40:34,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:35,593 INFO L124 PetriNetUnfolderBase]: 1559/2375 cut-off events. [2024-06-21 19:40:35,593 INFO L125 PetriNetUnfolderBase]: For 9051/9087 co-relation queries the response was YES. [2024-06-21 19:40:35,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9169 conditions, 2375 events. 1559/2375 cut-off events. For 9051/9087 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 11036 event pairs, 892 based on Foata normal form. 14/2362 useless extension candidates. Maximal degree in co-relation 9133. Up to 2282 conditions per place. [2024-06-21 19:40:35,608 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 62 selfloop transitions, 25 changer transitions 0/94 dead transitions. [2024-06-21 19:40:35,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 94 transitions, 780 flow [2024-06-21 19:40:35,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:40:35,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:40:35,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-21 19:40:35,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 19:40:35,612 INFO L175 Difference]: Start difference. First operand has 70 places, 70 transitions, 479 flow. Second operand 6 states and 104 transitions. [2024-06-21 19:40:35,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 94 transitions, 780 flow [2024-06-21 19:40:35,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 94 transitions, 714 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 19:40:35,622 INFO L231 Difference]: Finished difference. Result has 72 places, 80 transitions, 572 flow [2024-06-21 19:40:35,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=572, PETRI_PLACES=72, PETRI_TRANSITIONS=80} [2024-06-21 19:40:35,624 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-06-21 19:40:35,624 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 80 transitions, 572 flow [2024-06-21 19:40:35,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:35,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:35,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:35,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 19:40:35,625 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 19:40:35,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:35,626 INFO L85 PathProgramCache]: Analyzing trace with hash -639115067, now seen corresponding path program 3 times [2024-06-21 19:40:35,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:35,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822574968] [2024-06-21 19:40:35,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:35,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:35,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:36,720 INFO 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 19:40:36,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:36,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822574968] [2024-06-21 19:40:36,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822574968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:36,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:36,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:40:36,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372186920] [2024-06-21 19:40:36,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:36,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:40:36,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:36,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:40:36,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:40:36,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:40:36,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 80 transitions, 572 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:36,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:36,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:40:36,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:37,299 INFO L124 PetriNetUnfolderBase]: 1583/2411 cut-off events. [2024-06-21 19:40:37,299 INFO L125 PetriNetUnfolderBase]: For 11713/11752 co-relation queries the response was YES. [2024-06-21 19:40:37,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9949 conditions, 2411 events. 1583/2411 cut-off events. For 11713/11752 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 11256 event pairs, 892 based on Foata normal form. 18/2402 useless extension candidates. Maximal degree in co-relation 9912. Up to 2286 conditions per place. [2024-06-21 19:40:37,317 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 58 selfloop transitions, 34 changer transitions 0/99 dead transitions. [2024-06-21 19:40:37,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 99 transitions, 842 flow [2024-06-21 19:40:37,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:40:37,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:40:37,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-21 19:40:37,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 19:40:37,319 INFO L175 Difference]: Start difference. First operand has 72 places, 80 transitions, 572 flow. Second operand 6 states and 104 transitions. [2024-06-21 19:40:37,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 99 transitions, 842 flow [2024-06-21 19:40:37,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 99 transitions, 812 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-21 19:40:37,333 INFO L231 Difference]: Finished difference. Result has 78 places, 85 transitions, 692 flow [2024-06-21 19:40:37,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=692, PETRI_PLACES=78, PETRI_TRANSITIONS=85} [2024-06-21 19:40:37,334 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 37 predicate places. [2024-06-21 19:40:37,334 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 85 transitions, 692 flow [2024-06-21 19:40:37,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:37,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:37,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:37,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 19:40:37,335 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 19:40:37,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:37,336 INFO L85 PathProgramCache]: Analyzing trace with hash -639107131, now seen corresponding path program 1 times [2024-06-21 19:40:37,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:37,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741911835] [2024-06-21 19:40:37,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:37,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:37,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:38,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:40:38,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:38,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741911835] [2024-06-21 19:40:38,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741911835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:38,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:38,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:40:38,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683857187] [2024-06-21 19:40:38,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:38,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:40:38,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:38,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:40:38,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:40:39,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:40:39,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 85 transitions, 692 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:39,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:39,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:40:39,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:39,700 INFO L124 PetriNetUnfolderBase]: 1651/2481 cut-off events. [2024-06-21 19:40:39,700 INFO L125 PetriNetUnfolderBase]: For 14963/15168 co-relation queries the response was YES. [2024-06-21 19:40:39,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10587 conditions, 2481 events. 1651/2481 cut-off events. For 14963/15168 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11733 event pairs, 973 based on Foata normal form. 2/2414 useless extension candidates. Maximal degree in co-relation 10546. Up to 2368 conditions per place. [2024-06-21 19:40:39,717 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 75 selfloop transitions, 16 changer transitions 0/106 dead transitions. [2024-06-21 19:40:39,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 106 transitions, 942 flow [2024-06-21 19:40:39,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:40:39,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:40:39,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 19:40:39,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-21 19:40:39,719 INFO L175 Difference]: Start difference. First operand has 78 places, 85 transitions, 692 flow. Second operand 7 states and 116 transitions. [2024-06-21 19:40:39,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 106 transitions, 942 flow [2024-06-21 19:40:39,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 106 transitions, 870 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-21 19:40:39,730 INFO L231 Difference]: Finished difference. Result has 82 places, 88 transitions, 680 flow [2024-06-21 19:40:39,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=680, PETRI_PLACES=82, PETRI_TRANSITIONS=88} [2024-06-21 19:40:39,731 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 41 predicate places. [2024-06-21 19:40:39,732 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 88 transitions, 680 flow [2024-06-21 19:40:39,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:39,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:39,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:39,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 19:40:39,733 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 19:40:39,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:39,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1014233227, now seen corresponding path program 1 times [2024-06-21 19:40:39,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:39,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694052412] [2024-06-21 19:40:39,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:39,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:39,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:40,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:40:40,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:40,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694052412] [2024-06-21 19:40:40,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694052412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:40,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:40,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:40:40,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510758992] [2024-06-21 19:40:40,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:40,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:40:40,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:40,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:40:40,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:40:40,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:40:40,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 88 transitions, 680 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:40,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:40,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:40:40,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:41,389 INFO L124 PetriNetUnfolderBase]: 1580/2390 cut-off events. [2024-06-21 19:40:41,390 INFO L125 PetriNetUnfolderBase]: For 17667/17780 co-relation queries the response was YES. [2024-06-21 19:40:41,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10857 conditions, 2390 events. 1580/2390 cut-off events. For 17667/17780 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 11108 event pairs, 595 based on Foata normal form. 43/2381 useless extension candidates. Maximal degree in co-relation 10815. Up to 2233 conditions per place. [2024-06-21 19:40:41,410 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 86 selfloop transitions, 32 changer transitions 0/126 dead transitions. [2024-06-21 19:40:41,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 126 transitions, 1058 flow [2024-06-21 19:40:41,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:40:41,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:40:41,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 19:40:41,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-21 19:40:41,413 INFO L175 Difference]: Start difference. First operand has 82 places, 88 transitions, 680 flow. Second operand 8 states and 138 transitions. [2024-06-21 19:40:41,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 126 transitions, 1058 flow [2024-06-21 19:40:41,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 126 transitions, 1022 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 19:40:41,427 INFO L231 Difference]: Finished difference. Result has 86 places, 99 transitions, 793 flow [2024-06-21 19:40:41,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=793, PETRI_PLACES=86, PETRI_TRANSITIONS=99} [2024-06-21 19:40:41,428 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 45 predicate places. [2024-06-21 19:40:41,428 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 99 transitions, 793 flow [2024-06-21 19:40:41,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:41,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:41,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:41,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 19:40:41,429 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 19:40:41,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:41,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1458796319, now seen corresponding path program 2 times [2024-06-21 19:40:41,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:41,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263050312] [2024-06-21 19:40:41,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:41,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:41,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:42,387 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 19:40:42,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:42,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263050312] [2024-06-21 19:40:42,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263050312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:42,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:42,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:40:42,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895347049] [2024-06-21 19:40:42,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:42,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:40:42,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:42,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:40:42,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:40:42,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:40:42,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 99 transitions, 793 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:42,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:42,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:40:42,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:43,061 INFO L124 PetriNetUnfolderBase]: 1636/2473 cut-off events. [2024-06-21 19:40:43,061 INFO L125 PetriNetUnfolderBase]: For 21743/21911 co-relation queries the response was YES. [2024-06-21 19:40:43,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11954 conditions, 2473 events. 1636/2473 cut-off events. For 21743/21911 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 11493 event pairs, 556 based on Foata normal form. 58/2475 useless extension candidates. Maximal degree in co-relation 11910. Up to 2290 conditions per place. [2024-06-21 19:40:43,082 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 89 selfloop transitions, 44 changer transitions 0/141 dead transitions. [2024-06-21 19:40:43,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 141 transitions, 1285 flow [2024-06-21 19:40:43,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:40:43,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:40:43,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 19:40:43,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-21 19:40:43,084 INFO L175 Difference]: Start difference. First operand has 86 places, 99 transitions, 793 flow. Second operand 8 states and 139 transitions. [2024-06-21 19:40:43,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 141 transitions, 1285 flow [2024-06-21 19:40:43,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 141 transitions, 1224 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-21 19:40:43,103 INFO L231 Difference]: Finished difference. Result has 94 places, 117 transitions, 1026 flow [2024-06-21 19:40:43,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1026, PETRI_PLACES=94, PETRI_TRANSITIONS=117} [2024-06-21 19:40:43,104 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 53 predicate places. [2024-06-21 19:40:43,104 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 117 transitions, 1026 flow [2024-06-21 19:40:43,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:43,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:43,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:43,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 19:40:43,105 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 19:40:43,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:43,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1491984485, now seen corresponding path program 1 times [2024-06-21 19:40:43,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:43,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437662141] [2024-06-21 19:40:43,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:43,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:43,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:44,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:40:44,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:44,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437662141] [2024-06-21 19:40:44,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437662141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:44,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:44,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:40:44,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125018488] [2024-06-21 19:40:44,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:44,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:40:44,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:44,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:40:44,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:40:44,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:40:44,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 117 transitions, 1026 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:44,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:44,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:40:44,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:44,905 INFO L124 PetriNetUnfolderBase]: 1779/2667 cut-off events. [2024-06-21 19:40:44,905 INFO L125 PetriNetUnfolderBase]: For 22954/22954 co-relation queries the response was YES. [2024-06-21 19:40:44,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13253 conditions, 2667 events. 1779/2667 cut-off events. For 22954/22954 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12297 event pairs, 814 based on Foata normal form. 2/2668 useless extension candidates. Maximal degree in co-relation 13205. Up to 2591 conditions per place. [2024-06-21 19:40:44,926 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 129 selfloop transitions, 25 changer transitions 0/157 dead transitions. [2024-06-21 19:40:44,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 157 transitions, 1578 flow [2024-06-21 19:40:44,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:40:44,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:40:44,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 19:40:44,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-21 19:40:44,928 INFO L175 Difference]: Start difference. First operand has 94 places, 117 transitions, 1026 flow. Second operand 8 states and 127 transitions. [2024-06-21 19:40:44,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 157 transitions, 1578 flow [2024-06-21 19:40:44,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 157 transitions, 1502 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-21 19:40:44,953 INFO L231 Difference]: Finished difference. Result has 102 places, 133 transitions, 1221 flow [2024-06-21 19:40:44,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=961, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1221, PETRI_PLACES=102, PETRI_TRANSITIONS=133} [2024-06-21 19:40:44,955 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 61 predicate places. [2024-06-21 19:40:44,955 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 133 transitions, 1221 flow [2024-06-21 19:40:44,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:44,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:44,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:44,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 19:40:44,956 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 19:40:44,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:44,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1458916289, now seen corresponding path program 3 times [2024-06-21 19:40:44,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:44,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070212214] [2024-06-21 19:40:44,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:44,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:44,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:46,042 INFO 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 19:40:46,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:46,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070212214] [2024-06-21 19:40:46,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070212214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:46,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:46,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:40:46,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377477100] [2024-06-21 19:40:46,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:46,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:40:46,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:46,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:40:46,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:40:46,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:40:46,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 133 transitions, 1221 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:46,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:46,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:40:46,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:46,769 INFO L124 PetriNetUnfolderBase]: 1704/2579 cut-off events. [2024-06-21 19:40:46,769 INFO L125 PetriNetUnfolderBase]: For 30634/30731 co-relation queries the response was YES. [2024-06-21 19:40:46,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13865 conditions, 2579 events. 1704/2579 cut-off events. For 30634/30731 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12063 event pairs, 537 based on Foata normal form. 41/2564 useless extension candidates. Maximal degree in co-relation 13813. Up to 2295 conditions per place. [2024-06-21 19:40:46,798 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 94 selfloop transitions, 59 changer transitions 0/165 dead transitions. [2024-06-21 19:40:46,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 165 transitions, 1741 flow [2024-06-21 19:40:46,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:40:46,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:40:46,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 19:40:46,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-21 19:40:46,800 INFO L175 Difference]: Start difference. First operand has 102 places, 133 transitions, 1221 flow. Second operand 8 states and 142 transitions. [2024-06-21 19:40:46,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 165 transitions, 1741 flow [2024-06-21 19:40:46,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 165 transitions, 1713 flow, removed 13 selfloop flow, removed 1 redundant places. [2024-06-21 19:40:46,830 INFO L231 Difference]: Finished difference. Result has 110 places, 139 transitions, 1436 flow [2024-06-21 19:40:46,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1193, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1436, PETRI_PLACES=110, PETRI_TRANSITIONS=139} [2024-06-21 19:40:46,831 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 69 predicate places. [2024-06-21 19:40:46,831 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 139 transitions, 1436 flow [2024-06-21 19:40:46,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:46,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:46,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:46,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 19:40:46,832 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 19:40:46,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:46,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1655836267, now seen corresponding path program 4 times [2024-06-21 19:40:46,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:46,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680353437] [2024-06-21 19:40:46,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:46,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:46,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:47,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:40:47,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:47,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680353437] [2024-06-21 19:40:47,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680353437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:47,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:47,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:40:47,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517269558] [2024-06-21 19:40:47,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:47,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:40:47,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:47,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:40:47,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:40:47,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:40:47,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 139 transitions, 1436 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:47,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:47,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:40:47,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:48,598 INFO L124 PetriNetUnfolderBase]: 1750/2651 cut-off events. [2024-06-21 19:40:48,598 INFO L125 PetriNetUnfolderBase]: For 37288/37446 co-relation queries the response was YES. [2024-06-21 19:40:48,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15163 conditions, 2651 events. 1750/2651 cut-off events. For 37288/37446 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12450 event pairs, 543 based on Foata normal form. 62/2649 useless extension candidates. Maximal degree in co-relation 15107. Up to 2421 conditions per place. [2024-06-21 19:40:48,626 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 107 selfloop transitions, 58 changer transitions 0/177 dead transitions. [2024-06-21 19:40:48,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 177 transitions, 2029 flow [2024-06-21 19:40:48,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:40:48,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:40:48,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 19:40:48,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-21 19:40:48,628 INFO L175 Difference]: Start difference. First operand has 110 places, 139 transitions, 1436 flow. Second operand 8 states and 133 transitions. [2024-06-21 19:40:48,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 177 transitions, 2029 flow [2024-06-21 19:40:48,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 177 transitions, 1914 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 19:40:48,664 INFO L231 Difference]: Finished difference. Result has 114 places, 159 transitions, 1695 flow [2024-06-21 19:40:48,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1331, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1695, PETRI_PLACES=114, PETRI_TRANSITIONS=159} [2024-06-21 19:40:48,665 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 73 predicate places. [2024-06-21 19:40:48,665 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 159 transitions, 1695 flow [2024-06-21 19:40:48,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:48,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:48,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:48,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 19:40:48,666 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 19:40:48,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:48,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1655840917, now seen corresponding path program 5 times [2024-06-21 19:40:48,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:48,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100018879] [2024-06-21 19:40:48,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:48,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:48,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:49,721 INFO 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 19:40:49,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:49,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100018879] [2024-06-21 19:40:49,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100018879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:49,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:49,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:40:49,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627647520] [2024-06-21 19:40:49,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:49,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:40:49,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:49,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:40:49,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:40:49,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:40:49,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 159 transitions, 1695 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:49,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:49,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:40:49,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:50,421 INFO L124 PetriNetUnfolderBase]: 1805/2732 cut-off events. [2024-06-21 19:40:50,421 INFO L125 PetriNetUnfolderBase]: For 43163/43344 co-relation queries the response was YES. [2024-06-21 19:40:50,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16372 conditions, 2732 events. 1805/2732 cut-off events. For 43163/43344 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12920 event pairs, 549 based on Foata normal form. 71/2739 useless extension candidates. Maximal degree in co-relation 16314. Up to 2422 conditions per place. [2024-06-21 19:40:50,444 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 111 selfloop transitions, 68 changer transitions 0/191 dead transitions. [2024-06-21 19:40:50,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 191 transitions, 2334 flow [2024-06-21 19:40:50,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:40:50,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:40:50,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 19:40:50,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607142857142857 [2024-06-21 19:40:50,446 INFO L175 Difference]: Start difference. First operand has 114 places, 159 transitions, 1695 flow. Second operand 7 states and 129 transitions. [2024-06-21 19:40:50,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 191 transitions, 2334 flow [2024-06-21 19:40:50,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 191 transitions, 2269 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-21 19:40:50,494 INFO L231 Difference]: Finished difference. Result has 120 places, 171 transitions, 1987 flow [2024-06-21 19:40:50,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1630, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1987, PETRI_PLACES=120, PETRI_TRANSITIONS=171} [2024-06-21 19:40:50,495 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 79 predicate places. [2024-06-21 19:40:50,495 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 171 transitions, 1987 flow [2024-06-21 19:40:50,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:50,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:50,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:50,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 19:40:50,496 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 19:40:50,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:50,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1655841103, now seen corresponding path program 2 times [2024-06-21 19:40:50,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:50,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465629900] [2024-06-21 19:40:50,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:50,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:50,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:51,489 INFO 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 19:40:51,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:51,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465629900] [2024-06-21 19:40:51,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465629900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:51,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:51,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:40:51,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347345146] [2024-06-21 19:40:51,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:51,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:40:51,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:51,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:40:51,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:40:51,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:40:51,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 171 transitions, 1987 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:51,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:51,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:40:51,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:52,131 INFO L124 PetriNetUnfolderBase]: 1983/2959 cut-off events. [2024-06-21 19:40:52,131 INFO L125 PetriNetUnfolderBase]: For 45047/45049 co-relation queries the response was YES. [2024-06-21 19:40:52,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17978 conditions, 2959 events. 1983/2959 cut-off events. For 45047/45049 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 13779 event pairs, 831 based on Foata normal form. 4/2961 useless extension candidates. Maximal degree in co-relation 17917. Up to 2879 conditions per place. [2024-06-21 19:40:52,160 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 168 selfloop transitions, 29 changer transitions 0/200 dead transitions. [2024-06-21 19:40:52,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 200 transitions, 2523 flow [2024-06-21 19:40:52,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:40:52,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:40:52,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 19:40:52,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-21 19:40:52,163 INFO L175 Difference]: Start difference. First operand has 120 places, 171 transitions, 1987 flow. Second operand 7 states and 113 transitions. [2024-06-21 19:40:52,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 200 transitions, 2523 flow [2024-06-21 19:40:52,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 200 transitions, 2436 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 19:40:52,222 INFO L231 Difference]: Finished difference. Result has 125 places, 182 transitions, 2078 flow [2024-06-21 19:40:52,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1900, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2078, PETRI_PLACES=125, PETRI_TRANSITIONS=182} [2024-06-21 19:40:52,223 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 84 predicate places. [2024-06-21 19:40:52,223 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 182 transitions, 2078 flow [2024-06-21 19:40:52,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:52,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:52,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:52,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 19:40:52,224 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 19:40:52,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:52,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1662270193, now seen corresponding path program 3 times [2024-06-21 19:40:52,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:52,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244123795] [2024-06-21 19:40:52,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:52,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:52,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:53,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:40:53,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:53,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244123795] [2024-06-21 19:40:53,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244123795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:53,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:53,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:40:53,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650819316] [2024-06-21 19:40:53,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:53,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:40:53,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:53,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:40:53,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:40:53,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:40:53,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 182 transitions, 2078 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:53,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:53,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:40:53,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:53,860 INFO L124 PetriNetUnfolderBase]: 1994/2977 cut-off events. [2024-06-21 19:40:53,860 INFO L125 PetriNetUnfolderBase]: For 49080/49084 co-relation queries the response was YES. [2024-06-21 19:40:53,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18717 conditions, 2977 events. 1994/2977 cut-off events. For 49080/49084 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 13874 event pairs, 833 based on Foata normal form. 6/2981 useless extension candidates. Maximal degree in co-relation 18653. Up to 2830 conditions per place. [2024-06-21 19:40:53,885 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 163 selfloop transitions, 44 changer transitions 0/210 dead transitions. [2024-06-21 19:40:53,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 210 transitions, 2698 flow [2024-06-21 19:40:53,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:40:53,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:40:53,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-21 19:40:53,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-21 19:40:53,887 INFO L175 Difference]: Start difference. First operand has 125 places, 182 transitions, 2078 flow. Second operand 8 states and 124 transitions. [2024-06-21 19:40:53,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 210 transitions, 2698 flow [2024-06-21 19:40:53,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 210 transitions, 2676 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-21 19:40:53,955 INFO L231 Difference]: Finished difference. Result has 133 places, 190 transitions, 2241 flow [2024-06-21 19:40:53,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2056, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2241, PETRI_PLACES=133, PETRI_TRANSITIONS=190} [2024-06-21 19:40:53,956 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 92 predicate places. [2024-06-21 19:40:53,956 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 190 transitions, 2241 flow [2024-06-21 19:40:53,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:53,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:53,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:53,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 19:40:53,957 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 19:40:53,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:53,957 INFO L85 PathProgramCache]: Analyzing trace with hash 866303261, now seen corresponding path program 6 times [2024-06-21 19:40:53,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:53,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857732766] [2024-06-21 19:40:53,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:53,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:53,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:54,993 INFO 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 19:40:54,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:54,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857732766] [2024-06-21 19:40:54,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857732766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:54,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:54,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:40:54,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345664105] [2024-06-21 19:40:54,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:54,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:40:54,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:54,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:40:54,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:40:55,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:40:55,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 190 transitions, 2241 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:55,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:55,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:40:55,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:55,684 INFO L124 PetriNetUnfolderBase]: 1837/2782 cut-off events. [2024-06-21 19:40:55,684 INFO L125 PetriNetUnfolderBase]: For 59190/59350 co-relation queries the response was YES. [2024-06-21 19:40:55,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18625 conditions, 2782 events. 1837/2782 cut-off events. For 59190/59350 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13174 event pairs, 563 based on Foata normal form. 81/2798 useless extension candidates. Maximal degree in co-relation 18557. Up to 2322 conditions per place. [2024-06-21 19:40:55,704 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 107 selfloop transitions, 92 changer transitions 0/218 dead transitions. [2024-06-21 19:40:55,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 218 transitions, 2961 flow [2024-06-21 19:40:55,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:40:55,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:40:55,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 19:40:55,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 19:40:55,707 INFO L175 Difference]: Start difference. First operand has 133 places, 190 transitions, 2241 flow. Second operand 7 states and 130 transitions. [2024-06-21 19:40:55,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 218 transitions, 2961 flow [2024-06-21 19:40:55,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 218 transitions, 2863 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 19:40:55,773 INFO L231 Difference]: Finished difference. Result has 136 places, 196 transitions, 2463 flow [2024-06-21 19:40:55,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2143, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2463, PETRI_PLACES=136, PETRI_TRANSITIONS=196} [2024-06-21 19:40:55,774 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 95 predicate places. [2024-06-21 19:40:55,774 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 196 transitions, 2463 flow [2024-06-21 19:40:55,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:55,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:55,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:55,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 19:40:55,775 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 19:40:55,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:55,775 INFO L85 PathProgramCache]: Analyzing trace with hash -51079195, now seen corresponding path program 4 times [2024-06-21 19:40:55,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:55,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181083573] [2024-06-21 19:40:55,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:55,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:55,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:57,032 INFO 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 19:40:57,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:57,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181083573] [2024-06-21 19:40:57,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181083573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:57,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:57,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:40:57,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909389236] [2024-06-21 19:40:57,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:57,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:40:57,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:57,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:40:57,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:40:57,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:40:57,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 196 transitions, 2463 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:57,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:57,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:40:57,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:57,702 INFO L124 PetriNetUnfolderBase]: 1981/2959 cut-off events. [2024-06-21 19:40:57,702 INFO L125 PetriNetUnfolderBase]: For 59019/59023 co-relation queries the response was YES. [2024-06-21 19:40:57,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19743 conditions, 2959 events. 1981/2959 cut-off events. For 59019/59023 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13827 event pairs, 829 based on Foata normal form. 6/2963 useless extension candidates. Maximal degree in co-relation 19674. Up to 2814 conditions per place. [2024-06-21 19:40:57,720 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 164 selfloop transitions, 48 changer transitions 0/215 dead transitions. [2024-06-21 19:40:57,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 215 transitions, 2956 flow [2024-06-21 19:40:57,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:40:57,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:40:57,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-21 19:40:57,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.378125 [2024-06-21 19:40:57,722 INFO L175 Difference]: Start difference. First operand has 136 places, 196 transitions, 2463 flow. Second operand 8 states and 121 transitions. [2024-06-21 19:40:57,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 215 transitions, 2956 flow [2024-06-21 19:40:57,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 215 transitions, 2715 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-21 19:40:57,786 INFO L231 Difference]: Finished difference. Result has 140 places, 197 transitions, 2333 flow [2024-06-21 19:40:57,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2224, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2333, PETRI_PLACES=140, PETRI_TRANSITIONS=197} [2024-06-21 19:40:57,787 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 99 predicate places. [2024-06-21 19:40:57,787 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 197 transitions, 2333 flow [2024-06-21 19:40:57,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:57,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:57,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:57,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 19:40:57,788 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 19:40:57,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:57,788 INFO L85 PathProgramCache]: Analyzing trace with hash -51070267, now seen corresponding path program 1 times [2024-06-21 19:40:57,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:57,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668686645] [2024-06-21 19:40:57,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:57,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:57,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:59,351 INFO 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 19:40:59,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:59,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668686645] [2024-06-21 19:40:59,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668686645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:59,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:59,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:40:59,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857149529] [2024-06-21 19:40:59,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:59,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:40:59,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:59,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:40:59,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:40:59,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:40:59,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 197 transitions, 2333 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:59,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:59,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:40:59,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:00,047 INFO L124 PetriNetUnfolderBase]: 1973/2950 cut-off events. [2024-06-21 19:41:00,048 INFO L125 PetriNetUnfolderBase]: For 58863/58863 co-relation queries the response was YES. [2024-06-21 19:41:00,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19205 conditions, 2950 events. 1973/2950 cut-off events. For 58863/58863 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13763 event pairs, 885 based on Foata normal form. 4/2953 useless extension candidates. Maximal degree in co-relation 19135. Up to 2870 conditions per place. [2024-06-21 19:41:00,065 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 201 selfloop transitions, 18 changer transitions 0/222 dead transitions. [2024-06-21 19:41:00,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 222 transitions, 2865 flow [2024-06-21 19:41:00,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:41:00,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:41:00,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-21 19:41:00,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-21 19:41:00,067 INFO L175 Difference]: Start difference. First operand has 140 places, 197 transitions, 2333 flow. Second operand 8 states and 124 transitions. [2024-06-21 19:41:00,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 222 transitions, 2865 flow [2024-06-21 19:41:00,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 222 transitions, 2802 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-21 19:41:00,122 INFO L231 Difference]: Finished difference. Result has 144 places, 199 transitions, 2333 flow [2024-06-21 19:41:00,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2270, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2333, PETRI_PLACES=144, PETRI_TRANSITIONS=199} [2024-06-21 19:41:00,123 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 103 predicate places. [2024-06-21 19:41:00,123 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 199 transitions, 2333 flow [2024-06-21 19:41:00,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:00,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:00,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:00,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 19:41:00,123 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 19:41:00,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:00,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1785116638, now seen corresponding path program 1 times [2024-06-21 19:41:00,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:00,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371713895] [2024-06-21 19:41:00,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:00,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:00,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:00,976 INFO 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 19:41:00,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:00,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371713895] [2024-06-21 19:41:00,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371713895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:00,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:00,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:41:00,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125241456] [2024-06-21 19:41:00,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:00,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:41:00,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:00,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:41:00,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:41:01,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 19:41:01,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 199 transitions, 2333 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 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 19:41:01,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:01,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 19:41:01,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:01,646 INFO L124 PetriNetUnfolderBase]: 1741/2674 cut-off events. [2024-06-21 19:41:01,646 INFO L125 PetriNetUnfolderBase]: For 69266/69483 co-relation queries the response was YES. [2024-06-21 19:41:01,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18168 conditions, 2674 events. 1741/2674 cut-off events. For 69266/69483 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12857 event pairs, 536 based on Foata normal form. 113/2729 useless extension candidates. Maximal degree in co-relation 18097. Up to 2273 conditions per place. [2024-06-21 19:41:01,667 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 107 selfloop transitions, 83 changer transitions 0/232 dead transitions. [2024-06-21 19:41:01,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 232 transitions, 2959 flow [2024-06-21 19:41:01,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:41:01,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:41:01,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 19:41:01,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-21 19:41:01,673 INFO L175 Difference]: Start difference. First operand has 144 places, 199 transitions, 2333 flow. Second operand 7 states and 128 transitions. [2024-06-21 19:41:01,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 232 transitions, 2959 flow [2024-06-21 19:41:01,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 232 transitions, 2914 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 19:41:01,741 INFO L231 Difference]: Finished difference. Result has 146 places, 212 transitions, 2719 flow [2024-06-21 19:41:01,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2288, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2719, PETRI_PLACES=146, PETRI_TRANSITIONS=212} [2024-06-21 19:41:01,742 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 105 predicate places. [2024-06-21 19:41:01,742 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 212 transitions, 2719 flow [2024-06-21 19:41:01,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 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 19:41:01,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:01,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:01,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 19:41:01,743 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 19:41:01,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:01,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1342292330, now seen corresponding path program 2 times [2024-06-21 19:41:01,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:01,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600669415] [2024-06-21 19:41:01,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:01,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:01,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:02,877 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 19:41:02,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:02,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600669415] [2024-06-21 19:41:02,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600669415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:02,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:02,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:41:02,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058242702] [2024-06-21 19:41:02,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:02,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:41:02,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:02,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:41:02,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:41:02,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:41:02,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 212 transitions, 2719 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:02,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:02,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:41:02,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:03,669 INFO L124 PetriNetUnfolderBase]: 1891/2862 cut-off events. [2024-06-21 19:41:03,669 INFO L125 PetriNetUnfolderBase]: For 79457/79733 co-relation queries the response was YES. [2024-06-21 19:41:03,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20284 conditions, 2862 events. 1891/2862 cut-off events. For 79457/79733 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13529 event pairs, 582 based on Foata normal form. 162/2969 useless extension candidates. Maximal degree in co-relation 20211. Up to 2557 conditions per place. [2024-06-21 19:41:03,692 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 154 selfloop transitions, 89 changer transitions 0/264 dead transitions. [2024-06-21 19:41:03,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 264 transitions, 3689 flow [2024-06-21 19:41:03,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:41:03,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:41:03,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 19:41:03,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-21 19:41:03,694 INFO L175 Difference]: Start difference. First operand has 146 places, 212 transitions, 2719 flow. Second operand 9 states and 155 transitions. [2024-06-21 19:41:03,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 264 transitions, 3689 flow [2024-06-21 19:41:03,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 264 transitions, 3554 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-21 19:41:03,783 INFO L231 Difference]: Finished difference. Result has 152 places, 233 transitions, 3183 flow [2024-06-21 19:41:03,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2626, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3183, PETRI_PLACES=152, PETRI_TRANSITIONS=233} [2024-06-21 19:41:03,784 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 111 predicate places. [2024-06-21 19:41:03,784 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 233 transitions, 3183 flow [2024-06-21 19:41:03,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:03,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:03,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:03,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 19:41:03,785 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 19:41:03,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:03,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1376496025, now seen corresponding path program 1 times [2024-06-21 19:41:03,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:03,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604338046] [2024-06-21 19:41:03,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:03,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:03,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:04,789 INFO 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 19:41:04,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:04,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604338046] [2024-06-21 19:41:04,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604338046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:04,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:04,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:41:04,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811964462] [2024-06-21 19:41:04,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:04,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:41:04,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:04,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:41:04,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:41:04,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:41:04,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 233 transitions, 3183 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:04,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:04,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:41:04,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:05,564 INFO L124 PetriNetUnfolderBase]: 2138/3182 cut-off events. [2024-06-21 19:41:05,564 INFO L125 PetriNetUnfolderBase]: For 78683/78685 co-relation queries the response was YES. [2024-06-21 19:41:05,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22357 conditions, 3182 events. 2138/3182 cut-off events. For 78683/78685 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14778 event pairs, 602 based on Foata normal form. 4/3185 useless extension candidates. Maximal degree in co-relation 22283. Up to 2997 conditions per place. [2024-06-21 19:41:05,585 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 239 selfloop transitions, 62 changer transitions 0/304 dead transitions. [2024-06-21 19:41:05,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 304 transitions, 4494 flow [2024-06-21 19:41:05,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:41:05,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:41:05,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-21 19:41:05,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2024-06-21 19:41:05,587 INFO L175 Difference]: Start difference. First operand has 152 places, 233 transitions, 3183 flow. Second operand 9 states and 145 transitions. [2024-06-21 19:41:05,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 304 transitions, 4494 flow [2024-06-21 19:41:05,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 304 transitions, 4227 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 19:41:05,688 INFO L231 Difference]: Finished difference. Result has 159 places, 274 transitions, 3795 flow [2024-06-21 19:41:05,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2969, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3795, PETRI_PLACES=159, PETRI_TRANSITIONS=274} [2024-06-21 19:41:05,689 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 118 predicate places. [2024-06-21 19:41:05,689 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 274 transitions, 3795 flow [2024-06-21 19:41:05,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:05,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:05,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:05,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 19:41:05,690 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 19:41:05,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:05,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1077371332, now seen corresponding path program 3 times [2024-06-21 19:41:05,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:05,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635066611] [2024-06-21 19:41:05,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:05,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:05,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:06,765 INFO 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 19:41:06,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:06,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635066611] [2024-06-21 19:41:06,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635066611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:06,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:06,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:41:06,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033291962] [2024-06-21 19:41:06,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:06,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:41:06,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:06,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:41:06,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:41:06,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:41:06,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 274 transitions, 3795 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:06,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:06,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:41:06,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:07,528 INFO L124 PetriNetUnfolderBase]: 2024/3068 cut-off events. [2024-06-21 19:41:07,528 INFO L125 PetriNetUnfolderBase]: For 89894/90013 co-relation queries the response was YES. [2024-06-21 19:41:07,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22677 conditions, 3068 events. 2024/3068 cut-off events. For 89894/90013 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 14767 event pairs, 525 based on Foata normal form. 25/3025 useless extension candidates. Maximal degree in co-relation 22598. Up to 2676 conditions per place. [2024-06-21 19:41:07,554 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 174 selfloop transitions, 121 changer transitions 0/321 dead transitions. [2024-06-21 19:41:07,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 321 transitions, 4821 flow [2024-06-21 19:41:07,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:41:07,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:41:07,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 19:41:07,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-21 19:41:07,561 INFO L175 Difference]: Start difference. First operand has 159 places, 274 transitions, 3795 flow. Second operand 8 states and 141 transitions. [2024-06-21 19:41:07,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 321 transitions, 4821 flow [2024-06-21 19:41:07,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 321 transitions, 4738 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-21 19:41:07,712 INFO L231 Difference]: Finished difference. Result has 165 places, 296 transitions, 4364 flow [2024-06-21 19:41:07,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3712, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4364, PETRI_PLACES=165, PETRI_TRANSITIONS=296} [2024-06-21 19:41:07,712 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 124 predicate places. [2024-06-21 19:41:07,712 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 296 transitions, 4364 flow [2024-06-21 19:41:07,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:07,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:07,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:07,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 19:41:07,713 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 19:41:07,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:07,713 INFO L85 PathProgramCache]: Analyzing trace with hash -2021953577, now seen corresponding path program 2 times [2024-06-21 19:41:07,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:07,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919759398] [2024-06-21 19:41:07,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:07,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:07,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:08,552 INFO 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 19:41:08,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:08,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919759398] [2024-06-21 19:41:08,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919759398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:08,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:08,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:41:08,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277354306] [2024-06-21 19:41:08,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:08,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:41:08,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:08,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:41:08,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:41:08,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:41:08,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 296 transitions, 4364 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:08,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:08,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:41:08,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:09,280 INFO L124 PetriNetUnfolderBase]: 2218/3295 cut-off events. [2024-06-21 19:41:09,281 INFO L125 PetriNetUnfolderBase]: For 90564/90570 co-relation queries the response was YES. [2024-06-21 19:41:09,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24247 conditions, 3295 events. 2218/3295 cut-off events. For 90564/90570 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 15349 event pairs, 570 based on Foata normal form. 8/3302 useless extension candidates. Maximal degree in co-relation 24166. Up to 3106 conditions per place. [2024-06-21 19:41:09,312 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 266 selfloop transitions, 70 changer transitions 0/339 dead transitions. [2024-06-21 19:41:09,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 339 transitions, 5273 flow [2024-06-21 19:41:09,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:41:09,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:41:09,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-21 19:41:09,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40555555555555556 [2024-06-21 19:41:09,314 INFO L175 Difference]: Start difference. First operand has 165 places, 296 transitions, 4364 flow. Second operand 9 states and 146 transitions. [2024-06-21 19:41:09,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 339 transitions, 5273 flow [2024-06-21 19:41:09,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 339 transitions, 5116 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 19:41:09,453 INFO L231 Difference]: Finished difference. Result has 171 places, 311 transitions, 4530 flow [2024-06-21 19:41:09,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4209, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4530, PETRI_PLACES=171, PETRI_TRANSITIONS=311} [2024-06-21 19:41:09,454 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 130 predicate places. [2024-06-21 19:41:09,455 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 311 transitions, 4530 flow [2024-06-21 19:41:09,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:09,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:09,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:09,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 19:41:09,456 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 19:41:09,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:09,457 INFO L85 PathProgramCache]: Analyzing trace with hash -2018228927, now seen corresponding path program 3 times [2024-06-21 19:41:09,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:09,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923232137] [2024-06-21 19:41:09,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:09,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:09,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:10,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:41:10,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:10,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923232137] [2024-06-21 19:41:10,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923232137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:10,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:10,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:41:10,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774253857] [2024-06-21 19:41:10,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:10,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:41:10,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:10,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:41:10,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:41:10,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:41:10,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 311 transitions, 4530 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:10,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:10,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:41:10,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:11,292 INFO L124 PetriNetUnfolderBase]: 2293/3402 cut-off events. [2024-06-21 19:41:11,292 INFO L125 PetriNetUnfolderBase]: For 99882/99884 co-relation queries the response was YES. [2024-06-21 19:41:11,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25662 conditions, 3402 events. 2293/3402 cut-off events. For 99882/99884 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 15861 event pairs, 557 based on Foata normal form. 4/3405 useless extension candidates. Maximal degree in co-relation 25579. Up to 3024 conditions per place. [2024-06-21 19:41:11,317 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 255 selfloop transitions, 113 changer transitions 0/371 dead transitions. [2024-06-21 19:41:11,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 371 transitions, 5918 flow [2024-06-21 19:41:11,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:41:11,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:41:11,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 19:41:11,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-21 19:41:11,319 INFO L175 Difference]: Start difference. First operand has 171 places, 311 transitions, 4530 flow. Second operand 9 states and 151 transitions. [2024-06-21 19:41:11,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 371 transitions, 5918 flow [2024-06-21 19:41:11,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 371 transitions, 5884 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-06-21 19:41:11,461 INFO L231 Difference]: Finished difference. Result has 181 places, 341 transitions, 5316 flow [2024-06-21 19:41:11,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4496, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5316, PETRI_PLACES=181, PETRI_TRANSITIONS=341} [2024-06-21 19:41:11,462 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-21 19:41:11,462 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 341 transitions, 5316 flow [2024-06-21 19:41:11,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:11,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:11,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:11,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 19:41:11,462 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 19:41:11,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:11,463 INFO L85 PathProgramCache]: Analyzing trace with hash -993120400, now seen corresponding path program 1 times [2024-06-21 19:41:11,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:11,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835421511] [2024-06-21 19:41:11,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:11,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:11,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:12,859 INFO 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 19:41:12,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:12,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835421511] [2024-06-21 19:41:12,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835421511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:12,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:12,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:41:12,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556982284] [2024-06-21 19:41:12,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:12,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:41:12,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:12,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:41:12,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:41:13,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:41:13,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 341 transitions, 5316 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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 19:41:13,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:13,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:41:13,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:13,778 INFO L124 PetriNetUnfolderBase]: 2332/3460 cut-off events. [2024-06-21 19:41:13,779 INFO L125 PetriNetUnfolderBase]: For 111389/111391 co-relation queries the response was YES. [2024-06-21 19:41:13,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27367 conditions, 3460 events. 2332/3460 cut-off events. For 111389/111391 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 16227 event pairs, 504 based on Foata normal form. 8/3467 useless extension candidates. Maximal degree in co-relation 27279. Up to 3023 conditions per place. [2024-06-21 19:41:13,809 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 258 selfloop transitions, 115 changer transitions 0/376 dead transitions. [2024-06-21 19:41:13,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 376 transitions, 6344 flow [2024-06-21 19:41:13,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:41:13,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:41:13,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 19:41:13,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 19:41:13,812 INFO L175 Difference]: Start difference. First operand has 181 places, 341 transitions, 5316 flow. Second operand 9 states and 153 transitions. [2024-06-21 19:41:13,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 376 transitions, 6344 flow [2024-06-21 19:41:13,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 376 transitions, 6226 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-21 19:41:14,000 INFO L231 Difference]: Finished difference. Result has 186 places, 345 transitions, 5497 flow [2024-06-21 19:41:14,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5202, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5497, PETRI_PLACES=186, PETRI_TRANSITIONS=345} [2024-06-21 19:41:14,000 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 145 predicate places. [2024-06-21 19:41:14,000 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 345 transitions, 5497 flow [2024-06-21 19:41:14,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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 19:41:14,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:14,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:14,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 19:41:14,001 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 19:41:14,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:14,002 INFO L85 PathProgramCache]: Analyzing trace with hash -2018234507, now seen corresponding path program 4 times [2024-06-21 19:41:14,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:14,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057023590] [2024-06-21 19:41:14,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:14,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:14,905 INFO 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 19:41:14,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:14,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057023590] [2024-06-21 19:41:14,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057023590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:14,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:14,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:41:14,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14823973] [2024-06-21 19:41:14,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:14,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:41:14,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:14,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:41:14,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:41:14,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:41:14,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 345 transitions, 5497 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:14,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:14,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:41:14,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:15,719 INFO L124 PetriNetUnfolderBase]: 2324/3448 cut-off events. [2024-06-21 19:41:15,719 INFO L125 PetriNetUnfolderBase]: For 114628/114630 co-relation queries the response was YES. [2024-06-21 19:41:15,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28010 conditions, 3448 events. 2324/3448 cut-off events. For 114628/114630 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 16111 event pairs, 518 based on Foata normal form. 4/3451 useless extension candidates. Maximal degree in co-relation 27920. Up to 3072 conditions per place. [2024-06-21 19:41:15,747 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 273 selfloop transitions, 102 changer transitions 0/378 dead transitions. [2024-06-21 19:41:15,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 378 transitions, 6517 flow [2024-06-21 19:41:15,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:41:15,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:41:15,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 19:41:15,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-21 19:41:15,749 INFO L175 Difference]: Start difference. First operand has 186 places, 345 transitions, 5497 flow. Second operand 9 states and 151 transitions. [2024-06-21 19:41:15,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 378 transitions, 6517 flow [2024-06-21 19:41:15,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 378 transitions, 6261 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 19:41:15,961 INFO L231 Difference]: Finished difference. Result has 188 places, 348 transitions, 5504 flow [2024-06-21 19:41:15,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5246, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5504, PETRI_PLACES=188, PETRI_TRANSITIONS=348} [2024-06-21 19:41:15,962 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 147 predicate places. [2024-06-21 19:41:15,962 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 348 transitions, 5504 flow [2024-06-21 19:41:15,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:15,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:15,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:15,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 19:41:15,963 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 19:41:15,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:15,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1504236366, now seen corresponding path program 4 times [2024-06-21 19:41:15,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:15,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170303359] [2024-06-21 19:41:15,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:15,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:15,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:17,086 INFO 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 19:41:17,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:17,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170303359] [2024-06-21 19:41:17,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170303359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:17,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:17,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:41:17,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064964561] [2024-06-21 19:41:17,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:17,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:41:17,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:17,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:41:17,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:41:17,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:41:17,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 348 transitions, 5504 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:17,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:17,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:41:17,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:18,126 INFO L124 PetriNetUnfolderBase]: 2229/3344 cut-off events. [2024-06-21 19:41:18,126 INFO L125 PetriNetUnfolderBase]: For 132349/132449 co-relation queries the response was YES. [2024-06-21 19:41:18,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27997 conditions, 3344 events. 2229/3344 cut-off events. For 132349/132449 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 16089 event pairs, 482 based on Foata normal form. 24/3287 useless extension candidates. Maximal degree in co-relation 27906. Up to 2921 conditions per place. [2024-06-21 19:41:18,158 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 208 selfloop transitions, 125 changer transitions 0/372 dead transitions. [2024-06-21 19:41:18,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 372 transitions, 6349 flow [2024-06-21 19:41:18,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:41:18,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:41:18,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 19:41:18,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-21 19:41:18,160 INFO L175 Difference]: Start difference. First operand has 188 places, 348 transitions, 5504 flow. Second operand 8 states and 134 transitions. [2024-06-21 19:41:18,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 372 transitions, 6349 flow [2024-06-21 19:41:18,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 372 transitions, 6176 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 19:41:18,393 INFO L231 Difference]: Finished difference. Result has 191 places, 354 transitions, 5760 flow [2024-06-21 19:41:18,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5331, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5760, PETRI_PLACES=191, PETRI_TRANSITIONS=354} [2024-06-21 19:41:18,394 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 150 predicate places. [2024-06-21 19:41:18,394 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 354 transitions, 5760 flow [2024-06-21 19:41:18,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:18,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:18,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:18,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 19:41:18,395 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 19:41:18,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:18,395 INFO L85 PathProgramCache]: Analyzing trace with hash -208682485, now seen corresponding path program 5 times [2024-06-21 19:41:18,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:18,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139599297] [2024-06-21 19:41:18,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:18,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:18,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:19,378 INFO 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 19:41:19,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:19,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139599297] [2024-06-21 19:41:19,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139599297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:19,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:19,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:41:19,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185676226] [2024-06-21 19:41:19,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:19,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:41:19,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:19,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:41:19,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:41:19,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:41:19,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 354 transitions, 5760 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:19,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:19,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:41:19,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:20,227 INFO L124 PetriNetUnfolderBase]: 2370/3516 cut-off events. [2024-06-21 19:41:20,227 INFO L125 PetriNetUnfolderBase]: For 130129/130131 co-relation queries the response was YES. [2024-06-21 19:41:20,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28924 conditions, 3516 events. 2370/3516 cut-off events. For 130129/130131 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 16528 event pairs, 523 based on Foata normal form. 4/3516 useless extension candidates. Maximal degree in co-relation 28832. Up to 3324 conditions per place. [2024-06-21 19:41:20,261 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 316 selfloop transitions, 74 changer transitions 0/393 dead transitions. [2024-06-21 19:41:20,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 393 transitions, 6820 flow [2024-06-21 19:41:20,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:41:20,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:41:20,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-21 19:41:20,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-21 19:41:20,263 INFO L175 Difference]: Start difference. First operand has 191 places, 354 transitions, 5760 flow. Second operand 9 states and 140 transitions. [2024-06-21 19:41:20,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 393 transitions, 6820 flow [2024-06-21 19:41:20,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 393 transitions, 6612 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 19:41:20,510 INFO L231 Difference]: Finished difference. Result has 196 places, 371 transitions, 5956 flow [2024-06-21 19:41:20,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5553, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5956, PETRI_PLACES=196, PETRI_TRANSITIONS=371} [2024-06-21 19:41:20,511 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 155 predicate places. [2024-06-21 19:41:20,511 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 371 transitions, 5956 flow [2024-06-21 19:41:20,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:20,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:20,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:20,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 19:41:20,512 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 19:41:20,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:20,512 INFO L85 PathProgramCache]: Analyzing trace with hash -208538335, now seen corresponding path program 6 times [2024-06-21 19:41:20,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:20,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111831451] [2024-06-21 19:41:20,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:20,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:20,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:21,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:41:21,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:21,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111831451] [2024-06-21 19:41:21,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111831451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:21,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:21,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:41:21,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379687020] [2024-06-21 19:41:21,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:21,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:41:21,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:21,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:41:21,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:41:21,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:41:21,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 371 transitions, 5956 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:21,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:21,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:41:21,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:22,406 INFO L124 PetriNetUnfolderBase]: 2524/3735 cut-off events. [2024-06-21 19:41:22,406 INFO L125 PetriNetUnfolderBase]: For 144617/144619 co-relation queries the response was YES. [2024-06-21 19:41:22,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31247 conditions, 3735 events. 2524/3735 cut-off events. For 144617/144619 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 17697 event pairs, 525 based on Foata normal form. 4/3735 useless extension candidates. Maximal degree in co-relation 31154. Up to 3245 conditions per place. [2024-06-21 19:41:22,442 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 332 selfloop transitions, 102 changer transitions 0/437 dead transitions. [2024-06-21 19:41:22,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 437 transitions, 7676 flow [2024-06-21 19:41:22,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:41:22,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:41:22,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 19:41:22,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446875 [2024-06-21 19:41:22,444 INFO L175 Difference]: Start difference. First operand has 196 places, 371 transitions, 5956 flow. Second operand 8 states and 143 transitions. [2024-06-21 19:41:22,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 437 transitions, 7676 flow [2024-06-21 19:41:22,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 437 transitions, 7632 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-21 19:41:22,696 INFO L231 Difference]: Finished difference. Result has 204 places, 403 transitions, 6608 flow [2024-06-21 19:41:22,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5912, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6608, PETRI_PLACES=204, PETRI_TRANSITIONS=403} [2024-06-21 19:41:22,697 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 163 predicate places. [2024-06-21 19:41:22,697 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 403 transitions, 6608 flow [2024-06-21 19:41:22,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:22,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:22,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:22,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 19:41:22,698 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 19:41:22,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:22,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1508045646, now seen corresponding path program 5 times [2024-06-21 19:41:22,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:22,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521550257] [2024-06-21 19:41:22,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:22,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:22,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:23,826 INFO 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 19:41:23,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:23,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521550257] [2024-06-21 19:41:23,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521550257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:23,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:23,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:41:23,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210066134] [2024-06-21 19:41:23,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:23,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:41:23,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:23,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:41:23,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:41:23,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:41:23,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 403 transitions, 6608 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:23,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:23,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:41:23,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:24,824 INFO L124 PetriNetUnfolderBase]: 2422/3614 cut-off events. [2024-06-21 19:41:24,825 INFO L125 PetriNetUnfolderBase]: For 170565/170663 co-relation queries the response was YES. [2024-06-21 19:41:24,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32701 conditions, 3614 events. 2422/3614 cut-off events. For 170565/170663 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 17475 event pairs, 488 based on Foata normal form. 26/3556 useless extension candidates. Maximal degree in co-relation 32604. Up to 3093 conditions per place. [2024-06-21 19:41:24,858 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 215 selfloop transitions, 149 changer transitions 0/421 dead transitions. [2024-06-21 19:41:24,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 421 transitions, 7402 flow [2024-06-21 19:41:24,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:41:24,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:41:24,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 19:41:24,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 19:41:24,860 INFO L175 Difference]: Start difference. First operand has 204 places, 403 transitions, 6608 flow. Second operand 8 states and 136 transitions. [2024-06-21 19:41:24,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 421 transitions, 7402 flow [2024-06-21 19:41:25,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 421 transitions, 7275 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-21 19:41:25,134 INFO L231 Difference]: Finished difference. Result has 209 places, 403 transitions, 6801 flow [2024-06-21 19:41:25,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6481, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6801, PETRI_PLACES=209, PETRI_TRANSITIONS=403} [2024-06-21 19:41:25,135 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 168 predicate places. [2024-06-21 19:41:25,135 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 403 transitions, 6801 flow [2024-06-21 19:41:25,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:25,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:25,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:25,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 19:41:25,136 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 19:41:25,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:25,136 INFO L85 PathProgramCache]: Analyzing trace with hash 988308305, now seen corresponding path program 7 times [2024-06-21 19:41:25,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:25,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882324474] [2024-06-21 19:41:25,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:25,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:25,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:26,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:41:26,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:26,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882324474] [2024-06-21 19:41:26,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882324474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:26,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:26,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:41:26,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647353350] [2024-06-21 19:41:26,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:26,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:41:26,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:26,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:41:26,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:41:26,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:41:26,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 403 transitions, 6801 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:26,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:26,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:41:26,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:27,078 INFO L124 PetriNetUnfolderBase]: 2509/3715 cut-off events. [2024-06-21 19:41:27,078 INFO L125 PetriNetUnfolderBase]: For 164737/164739 co-relation queries the response was YES. [2024-06-21 19:41:27,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33148 conditions, 3715 events. 2509/3715 cut-off events. For 164737/164739 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 17605 event pairs, 525 based on Foata normal form. 6/3717 useless extension candidates. Maximal degree in co-relation 33049. Up to 3237 conditions per place. [2024-06-21 19:41:27,114 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 325 selfloop transitions, 109 changer transitions 0/437 dead transitions. [2024-06-21 19:41:27,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 437 transitions, 8095 flow [2024-06-21 19:41:27,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:41:27,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:41:27,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 19:41:27,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-21 19:41:27,116 INFO L175 Difference]: Start difference. First operand has 209 places, 403 transitions, 6801 flow. Second operand 8 states and 141 transitions. [2024-06-21 19:41:27,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 437 transitions, 8095 flow [2024-06-21 19:41:27,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 437 transitions, 7673 flow, removed 67 selfloop flow, removed 6 redundant places. [2024-06-21 19:41:27,419 INFO L231 Difference]: Finished difference. Result has 212 places, 410 transitions, 6803 flow [2024-06-21 19:41:27,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6419, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6803, PETRI_PLACES=212, PETRI_TRANSITIONS=410} [2024-06-21 19:41:27,419 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 171 predicate places. [2024-06-21 19:41:27,419 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 410 transitions, 6803 flow [2024-06-21 19:41:27,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:27,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:27,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:27,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 19:41:27,420 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 19:41:27,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:27,420 INFO L85 PathProgramCache]: Analyzing trace with hash 988308522, now seen corresponding path program 2 times [2024-06-21 19:41:27,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:27,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129441326] [2024-06-21 19:41:27,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:27,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:27,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:28,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:41:28,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:28,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129441326] [2024-06-21 19:41:28,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129441326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:28,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:28,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:41:28,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367818736] [2024-06-21 19:41:28,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:28,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:41:28,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:28,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:41:28,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:41:28,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:41:28,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 410 transitions, 6803 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:28,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:28,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:41:28,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:29,501 INFO L124 PetriNetUnfolderBase]: 2537/3756 cut-off events. [2024-06-21 19:41:29,501 INFO L125 PetriNetUnfolderBase]: For 171189/171191 co-relation queries the response was YES. [2024-06-21 19:41:29,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33602 conditions, 3756 events. 2537/3756 cut-off events. For 171189/171191 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 17809 event pairs, 525 based on Foata normal form. 8/3760 useless extension candidates. Maximal degree in co-relation 33501. Up to 3377 conditions per place. [2024-06-21 19:41:29,540 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 325 selfloop transitions, 119 changer transitions 0/447 dead transitions. [2024-06-21 19:41:29,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 447 transitions, 8142 flow [2024-06-21 19:41:29,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:41:29,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:41:29,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 19:41:29,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-21 19:41:29,541 INFO L175 Difference]: Start difference. First operand has 212 places, 410 transitions, 6803 flow. Second operand 8 states and 141 transitions. [2024-06-21 19:41:29,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 447 transitions, 8142 flow [2024-06-21 19:41:29,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 447 transitions, 7974 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 19:41:29,861 INFO L231 Difference]: Finished difference. Result has 218 places, 422 transitions, 7199 flow [2024-06-21 19:41:29,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6661, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7199, PETRI_PLACES=218, PETRI_TRANSITIONS=422} [2024-06-21 19:41:29,862 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 177 predicate places. [2024-06-21 19:41:29,862 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 422 transitions, 7199 flow [2024-06-21 19:41:29,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:29,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:29,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:29,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 19:41:29,863 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 19:41:29,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:29,863 INFO L85 PathProgramCache]: Analyzing trace with hash -627982853, now seen corresponding path program 8 times [2024-06-21 19:41:29,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:29,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727068338] [2024-06-21 19:41:29,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:29,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:29,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:30,907 INFO 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 19:41:30,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:30,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727068338] [2024-06-21 19:41:30,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727068338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:30,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:30,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:41:30,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374910854] [2024-06-21 19:41:30,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:30,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:41:30,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:30,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:41:30,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:41:30,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:41:30,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 422 transitions, 7199 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:30,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:30,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:41:30,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:31,753 INFO L124 PetriNetUnfolderBase]: 2564/3798 cut-off events. [2024-06-21 19:41:31,753 INFO L125 PetriNetUnfolderBase]: For 181941/181943 co-relation queries the response was YES. [2024-06-21 19:41:31,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34743 conditions, 3798 events. 2564/3798 cut-off events. For 181941/181943 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 18068 event pairs, 519 based on Foata normal form. 4/3798 useless extension candidates. Maximal degree in co-relation 34639. Up to 3240 conditions per place. [2024-06-21 19:41:31,792 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 300 selfloop transitions, 158 changer transitions 0/461 dead transitions. [2024-06-21 19:41:31,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 461 transitions, 8836 flow [2024-06-21 19:41:31,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:41:31,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:41:31,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 19:41:31,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 19:41:31,793 INFO L175 Difference]: Start difference. First operand has 218 places, 422 transitions, 7199 flow. Second operand 9 states and 150 transitions. [2024-06-21 19:41:31,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 461 transitions, 8836 flow [2024-06-21 19:41:32,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 461 transitions, 8751 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-21 19:41:32,196 INFO L231 Difference]: Finished difference. Result has 225 places, 433 transitions, 7662 flow [2024-06-21 19:41:32,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7114, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7662, PETRI_PLACES=225, PETRI_TRANSITIONS=433} [2024-06-21 19:41:32,197 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 184 predicate places. [2024-06-21 19:41:32,197 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 433 transitions, 7662 flow [2024-06-21 19:41:32,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:32,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:32,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:32,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 19:41:32,197 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 19:41:32,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:32,198 INFO L85 PathProgramCache]: Analyzing trace with hash -9230748, now seen corresponding path program 3 times [2024-06-21 19:41:32,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:32,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100783749] [2024-06-21 19:41:32,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:32,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:32,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:33,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:41:33,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:33,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100783749] [2024-06-21 19:41:33,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100783749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:33,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:33,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:41:33,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321126513] [2024-06-21 19:41:33,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:33,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:41:33,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:33,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:41:33,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:41:33,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:41:33,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 433 transitions, 7662 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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 19:41:33,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:33,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:41:33,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:34,536 INFO L124 PetriNetUnfolderBase]: 2575/3821 cut-off events. [2024-06-21 19:41:34,536 INFO L125 PetriNetUnfolderBase]: For 194182/194190 co-relation queries the response was YES. [2024-06-21 19:41:34,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35932 conditions, 3821 events. 2575/3821 cut-off events. For 194182/194190 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 18403 event pairs, 767 based on Foata normal form. 10/3829 useless extension candidates. Maximal degree in co-relation 35825. Up to 3662 conditions per place. [2024-06-21 19:41:34,574 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 407 selfloop transitions, 48 changer transitions 0/458 dead transitions. [2024-06-21 19:41:34,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 458 transitions, 8702 flow [2024-06-21 19:41:34,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:41:34,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:41:34,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-21 19:41:34,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37777777777777777 [2024-06-21 19:41:34,575 INFO L175 Difference]: Start difference. First operand has 225 places, 433 transitions, 7662 flow. Second operand 9 states and 136 transitions. [2024-06-21 19:41:34,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 458 transitions, 8702 flow [2024-06-21 19:41:34,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 458 transitions, 8447 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-21 19:41:34,883 INFO L231 Difference]: Finished difference. Result has 230 places, 436 transitions, 7561 flow [2024-06-21 19:41:34,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7407, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7561, PETRI_PLACES=230, PETRI_TRANSITIONS=436} [2024-06-21 19:41:34,884 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 189 predicate places. [2024-06-21 19:41:34,884 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 436 transitions, 7561 flow [2024-06-21 19:41:34,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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 19:41:34,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:34,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:34,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 19:41:34,885 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 19:41:34,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:34,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1590811826, now seen corresponding path program 6 times [2024-06-21 19:41:34,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:34,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228148876] [2024-06-21 19:41:34,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:34,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:34,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:36,286 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 19:41:36,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:36,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228148876] [2024-06-21 19:41:36,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228148876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:36,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:36,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:41:36,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325095093] [2024-06-21 19:41:36,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:36,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:41:36,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:36,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:41:36,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:41:36,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:41:36,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 436 transitions, 7561 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:36,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:36,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:41:36,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:37,204 INFO L124 PetriNetUnfolderBase]: 2485/3707 cut-off events. [2024-06-21 19:41:37,204 INFO L125 PetriNetUnfolderBase]: For 209913/209955 co-relation queries the response was YES. [2024-06-21 19:41:37,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36004 conditions, 3707 events. 2485/3707 cut-off events. For 209913/209955 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 17922 event pairs, 485 based on Foata normal form. 3/3623 useless extension candidates. Maximal degree in co-relation 35895. Up to 2972 conditions per place. [2024-06-21 19:41:37,244 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 173 selfloop transitions, 214 changer transitions 0/454 dead transitions. [2024-06-21 19:41:37,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 454 transitions, 8405 flow [2024-06-21 19:41:37,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:41:37,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:41:37,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 19:41:37,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-21 19:41:37,246 INFO L175 Difference]: Start difference. First operand has 230 places, 436 transitions, 7561 flow. Second operand 8 states and 134 transitions. [2024-06-21 19:41:37,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 454 transitions, 8405 flow [2024-06-21 19:41:37,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 454 transitions, 8245 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-21 19:41:37,588 INFO L231 Difference]: Finished difference. Result has 231 places, 436 transitions, 7841 flow [2024-06-21 19:41:37,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7401, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7841, PETRI_PLACES=231, PETRI_TRANSITIONS=436} [2024-06-21 19:41:37,588 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 190 predicate places. [2024-06-21 19:41:37,588 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 436 transitions, 7841 flow [2024-06-21 19:41:37,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:37,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:37,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:37,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 19:41:37,589 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 19:41:37,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:37,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1583187314, now seen corresponding path program 4 times [2024-06-21 19:41:37,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:37,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636750318] [2024-06-21 19:41:37,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:37,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:37,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:38,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:41:38,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:38,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636750318] [2024-06-21 19:41:38,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636750318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:38,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:38,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:41:38,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133672134] [2024-06-21 19:41:38,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:38,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:41:38,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:38,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:41:38,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:41:38,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:41:38,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 436 transitions, 7841 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:38,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:38,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:41:38,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:39,827 INFO L124 PetriNetUnfolderBase]: 2610/3865 cut-off events. [2024-06-21 19:41:39,827 INFO L125 PetriNetUnfolderBase]: For 210084/210086 co-relation queries the response was YES. [2024-06-21 19:41:39,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37326 conditions, 3865 events. 2610/3865 cut-off events. For 210084/210086 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 18394 event pairs, 519 based on Foata normal form. 4/3865 useless extension candidates. Maximal degree in co-relation 37216. Up to 3107 conditions per place. [2024-06-21 19:41:39,868 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 264 selfloop transitions, 204 changer transitions 0/471 dead transitions. [2024-06-21 19:41:39,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 471 transitions, 9332 flow [2024-06-21 19:41:39,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:41:39,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:41:39,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 19:41:39,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446875 [2024-06-21 19:41:39,870 INFO L175 Difference]: Start difference. First operand has 231 places, 436 transitions, 7841 flow. Second operand 8 states and 143 transitions. [2024-06-21 19:41:39,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 471 transitions, 9332 flow [2024-06-21 19:41:40,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 471 transitions, 8908 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 19:41:40,243 INFO L231 Difference]: Finished difference. Result has 234 places, 444 transitions, 8016 flow [2024-06-21 19:41:40,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7417, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8016, PETRI_PLACES=234, PETRI_TRANSITIONS=444} [2024-06-21 19:41:40,244 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 193 predicate places. [2024-06-21 19:41:40,244 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 444 transitions, 8016 flow [2024-06-21 19:41:40,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:40,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:40,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:40,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 19:41:40,245 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 19:41:40,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:40,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1590811671, now seen corresponding path program 9 times [2024-06-21 19:41:40,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:40,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82769840] [2024-06-21 19:41:40,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:40,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:40,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:41,310 INFO 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 19:41:41,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:41,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82769840] [2024-06-21 19:41:41,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82769840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:41,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:41,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:41:41,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920315612] [2024-06-21 19:41:41,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:41,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:41:41,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:41,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:41:41,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:41:41,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:41:41,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 444 transitions, 8016 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:41,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:41,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:41:41,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:42,315 INFO L124 PetriNetUnfolderBase]: 2605/3858 cut-off events. [2024-06-21 19:41:42,315 INFO L125 PetriNetUnfolderBase]: For 217308/217310 co-relation queries the response was YES. [2024-06-21 19:41:42,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38195 conditions, 3858 events. 2605/3858 cut-off events. For 217308/217310 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 18378 event pairs, 520 based on Foata normal form. 4/3858 useless extension candidates. Maximal degree in co-relation 38083. Up to 3302 conditions per place. [2024-06-21 19:41:42,377 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 307 selfloop transitions, 160 changer transitions 0/470 dead transitions. [2024-06-21 19:41:42,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 470 transitions, 9356 flow [2024-06-21 19:41:42,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:41:42,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:41:42,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 19:41:42,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-21 19:41:42,378 INFO L175 Difference]: Start difference. First operand has 234 places, 444 transitions, 8016 flow. Second operand 9 states and 147 transitions. [2024-06-21 19:41:42,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 470 transitions, 9356 flow [2024-06-21 19:41:42,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 470 transitions, 9201 flow, removed 50 selfloop flow, removed 2 redundant places. [2024-06-21 19:41:42,904 INFO L231 Difference]: Finished difference. Result has 241 places, 444 transitions, 8189 flow [2024-06-21 19:41:42,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7861, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8189, PETRI_PLACES=241, PETRI_TRANSITIONS=444} [2024-06-21 19:41:42,905 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 200 predicate places. [2024-06-21 19:41:42,905 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 444 transitions, 8189 flow [2024-06-21 19:41:42,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:42,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:42,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:42,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 19:41:42,906 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 19:41:42,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:42,906 INFO L85 PathProgramCache]: Analyzing trace with hash -627780826, now seen corresponding path program 5 times [2024-06-21 19:41:42,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:42,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647646126] [2024-06-21 19:41:42,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:42,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:42,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:44,086 INFO 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 19:41:44,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:44,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647646126] [2024-06-21 19:41:44,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647646126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:44,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:44,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:41:44,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219521106] [2024-06-21 19:41:44,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:44,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:41:44,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:44,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:41:44,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:41:44,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:41:44,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 444 transitions, 8189 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:44,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:44,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:41:44,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:45,047 INFO L124 PetriNetUnfolderBase]: 2628/3893 cut-off events. [2024-06-21 19:41:45,047 INFO L125 PetriNetUnfolderBase]: For 227703/227705 co-relation queries the response was YES. [2024-06-21 19:41:45,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39005 conditions, 3893 events. 2628/3893 cut-off events. For 227703/227705 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18596 event pairs, 520 based on Foata normal form. 8/3897 useless extension candidates. Maximal degree in co-relation 38891. Up to 3306 conditions per place. [2024-06-21 19:41:45,092 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 287 selfloop transitions, 184 changer transitions 0/474 dead transitions. [2024-06-21 19:41:45,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 474 transitions, 9616 flow [2024-06-21 19:41:45,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:41:45,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:41:45,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 19:41:45,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446875 [2024-06-21 19:41:45,094 INFO L175 Difference]: Start difference. First operand has 241 places, 444 transitions, 8189 flow. Second operand 8 states and 143 transitions. [2024-06-21 19:41:45,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 474 transitions, 9616 flow [2024-06-21 19:41:45,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 474 transitions, 9294 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 19:41:45,543 INFO L231 Difference]: Finished difference. Result has 242 places, 447 transitions, 8294 flow [2024-06-21 19:41:45,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7867, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8294, PETRI_PLACES=242, PETRI_TRANSITIONS=447} [2024-06-21 19:41:45,544 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 201 predicate places. [2024-06-21 19:41:45,544 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 447 transitions, 8294 flow [2024-06-21 19:41:45,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:45,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:45,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:45,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 19:41:45,544 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 19:41:45,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:45,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1583454441, now seen corresponding path program 10 times [2024-06-21 19:41:45,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:45,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706587474] [2024-06-21 19:41:45,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:45,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:45,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:46,571 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 19:41:46,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:46,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706587474] [2024-06-21 19:41:46,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706587474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:46,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:46,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:41:46,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330521960] [2024-06-21 19:41:46,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:46,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:41:46,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:46,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:41:46,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:41:46,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:41:46,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 447 transitions, 8294 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:46,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:46,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:41:46,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:47,536 INFO L124 PetriNetUnfolderBase]: 2617/3876 cut-off events. [2024-06-21 19:41:47,536 INFO L125 PetriNetUnfolderBase]: For 232173/232175 co-relation queries the response was YES. [2024-06-21 19:41:47,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39136 conditions, 3876 events. 2617/3876 cut-off events. For 232173/232175 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 18488 event pairs, 520 based on Foata normal form. 4/3876 useless extension candidates. Maximal degree in co-relation 39021. Up to 3322 conditions per place. [2024-06-21 19:41:47,579 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 287 selfloop transitions, 181 changer transitions 0/471 dead transitions. [2024-06-21 19:41:47,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 471 transitions, 9484 flow [2024-06-21 19:41:47,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:41:47,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:41:47,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-21 19:41:47,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2024-06-21 19:41:47,581 INFO L175 Difference]: Start difference. First operand has 242 places, 447 transitions, 8294 flow. Second operand 9 states and 145 transitions. [2024-06-21 19:41:47,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 471 transitions, 9484 flow [2024-06-21 19:41:48,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 471 transitions, 8957 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-21 19:41:48,028 INFO L231 Difference]: Finished difference. Result has 245 places, 447 transitions, 8137 flow [2024-06-21 19:41:48,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7767, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8137, PETRI_PLACES=245, PETRI_TRANSITIONS=447} [2024-06-21 19:41:48,029 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 204 predicate places. [2024-06-21 19:41:48,029 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 447 transitions, 8137 flow [2024-06-21 19:41:48,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:48,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:48,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:48,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 19:41:48,030 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 19:41:48,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:48,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1184153042, now seen corresponding path program 1 times [2024-06-21 19:41:48,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:48,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381072165] [2024-06-21 19:41:48,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:48,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:48,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:48,904 INFO 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 19:41:48,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:48,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381072165] [2024-06-21 19:41:48,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381072165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:48,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:48,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:41:48,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107221748] [2024-06-21 19:41:48,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:48,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:41:48,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:48,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:41:48,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:41:48,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:41:48,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 447 transitions, 8137 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:48,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:48,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:41:48,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:49,918 INFO L124 PetriNetUnfolderBase]: 2595/3877 cut-off events. [2024-06-21 19:41:49,918 INFO L125 PetriNetUnfolderBase]: For 267472/267602 co-relation queries the response was YES. [2024-06-21 19:41:49,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39519 conditions, 3877 events. 2595/3877 cut-off events. For 267472/267602 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 19164 event pairs, 665 based on Foata normal form. 11/3777 useless extension candidates. Maximal degree in co-relation 39403. Up to 3378 conditions per place. [2024-06-21 19:41:49,964 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 311 selfloop transitions, 103 changer transitions 0/485 dead transitions. [2024-06-21 19:41:49,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 485 transitions, 9140 flow [2024-06-21 19:41:49,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:41:49,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:41:49,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 19:41:49,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-21 19:41:49,966 INFO L175 Difference]: Start difference. First operand has 245 places, 447 transitions, 8137 flow. Second operand 9 states and 155 transitions. [2024-06-21 19:41:49,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 485 transitions, 9140 flow [2024-06-21 19:41:50,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 485 transitions, 8776 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 19:41:50,528 INFO L231 Difference]: Finished difference. Result has 248 places, 452 transitions, 8107 flow [2024-06-21 19:41:50,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7773, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8107, PETRI_PLACES=248, PETRI_TRANSITIONS=452} [2024-06-21 19:41:50,529 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 207 predicate places. [2024-06-21 19:41:50,529 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 452 transitions, 8107 flow [2024-06-21 19:41:50,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:50,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:50,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:50,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 19:41:50,530 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 19:41:50,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:50,530 INFO L85 PathProgramCache]: Analyzing trace with hash 800202284, now seen corresponding path program 2 times [2024-06-21 19:41:50,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:50,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709354570] [2024-06-21 19:41:50,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:50,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:50,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:51,193 INFO 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 19:41:51,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:51,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709354570] [2024-06-21 19:41:51,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709354570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:51,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:51,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:41:51,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957783785] [2024-06-21 19:41:51,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:51,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:41:51,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:51,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:41:51,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:41:51,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:41:51,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 452 transitions, 8107 flow. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:51,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:51,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:41:51,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:52,017 INFO L124 PetriNetUnfolderBase]: 2198/3508 cut-off events. [2024-06-21 19:41:52,017 INFO L125 PetriNetUnfolderBase]: For 269257/269409 co-relation queries the response was YES. [2024-06-21 19:41:52,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35804 conditions, 3508 events. 2198/3508 cut-off events. For 269257/269409 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 19119 event pairs, 276 based on Foata normal form. 93/3527 useless extension candidates. Maximal degree in co-relation 35685. Up to 2198 conditions per place. [2024-06-21 19:41:52,063 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 162 selfloop transitions, 147 changer transitions 0/482 dead transitions. [2024-06-21 19:41:52,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 482 transitions, 8922 flow [2024-06-21 19:41:52,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:41:52,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:41:52,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-21 19:41:52,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5107142857142857 [2024-06-21 19:41:52,064 INFO L175 Difference]: Start difference. First operand has 248 places, 452 transitions, 8107 flow. Second operand 7 states and 143 transitions. [2024-06-21 19:41:52,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 482 transitions, 8922 flow [2024-06-21 19:41:52,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 482 transitions, 8657 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-21 19:41:52,680 INFO L231 Difference]: Finished difference. Result has 250 places, 461 transitions, 8404 flow [2024-06-21 19:41:52,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7881, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8404, PETRI_PLACES=250, PETRI_TRANSITIONS=461} [2024-06-21 19:41:52,681 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 209 predicate places. [2024-06-21 19:41:52,681 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 461 transitions, 8404 flow [2024-06-21 19:41:52,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:52,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:52,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:52,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 19:41:52,682 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 19:41:52,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:52,682 INFO L85 PathProgramCache]: Analyzing trace with hash -530121830, now seen corresponding path program 1 times [2024-06-21 19:41:52,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:52,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437627610] [2024-06-21 19:41:52,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:52,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:52,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:53,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:41:53,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:53,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437627610] [2024-06-21 19:41:53,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437627610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:53,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:53,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:41:53,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874436810] [2024-06-21 19:41:53,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:53,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:41:53,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:53,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:41:53,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:41:53,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:41:53,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 461 transitions, 8404 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:53,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:53,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:41:53,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:54,493 INFO L124 PetriNetUnfolderBase]: 2702/4059 cut-off events. [2024-06-21 19:41:54,493 INFO L125 PetriNetUnfolderBase]: For 266859/266897 co-relation queries the response was YES. [2024-06-21 19:41:54,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40680 conditions, 4059 events. 2702/4059 cut-off events. For 266859/266897 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 20306 event pairs, 479 based on Foata normal form. 44/4099 useless extension candidates. Maximal degree in co-relation 40560. Up to 3528 conditions per place. [2024-06-21 19:41:54,541 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 340 selfloop transitions, 140 changer transitions 0/510 dead transitions. [2024-06-21 19:41:54,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 510 transitions, 9947 flow [2024-06-21 19:41:54,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:41:54,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:41:54,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 19:41:54,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-21 19:41:54,545 INFO L175 Difference]: Start difference. First operand has 250 places, 461 transitions, 8404 flow. Second operand 8 states and 138 transitions. [2024-06-21 19:41:54,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 510 transitions, 9947 flow [2024-06-21 19:41:55,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 510 transitions, 9808 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 19:41:55,122 INFO L231 Difference]: Finished difference. Result has 255 places, 486 transitions, 9196 flow [2024-06-21 19:41:55,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8277, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9196, PETRI_PLACES=255, PETRI_TRANSITIONS=486} [2024-06-21 19:41:55,123 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 214 predicate places. [2024-06-21 19:41:55,123 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 486 transitions, 9196 flow [2024-06-21 19:41:55,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:55,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:55,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:55,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 19:41:55,124 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 19:41:55,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:55,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1341291130, now seen corresponding path program 2 times [2024-06-21 19:41:55,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:55,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817872944] [2024-06-21 19:41:55,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:55,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:55,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:56,201 INFO 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 19:41:56,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:56,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817872944] [2024-06-21 19:41:56,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817872944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:56,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:56,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:41:56,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567665770] [2024-06-21 19:41:56,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:56,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:41:56,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:56,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:41:56,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:41:56,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:41:56,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 486 transitions, 9196 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:56,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:56,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:41:56,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:57,372 INFO L124 PetriNetUnfolderBase]: 2842/4238 cut-off events. [2024-06-21 19:41:57,373 INFO L125 PetriNetUnfolderBase]: For 282763/282767 co-relation queries the response was YES. [2024-06-21 19:41:57,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43228 conditions, 4238 events. 2842/4238 cut-off events. For 282763/282767 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 21204 event pairs, 691 based on Foata normal form. 7/4244 useless extension candidates. Maximal degree in co-relation 43107. Up to 3903 conditions per place. [2024-06-21 19:41:57,416 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 413 selfloop transitions, 117 changer transitions 0/533 dead transitions. [2024-06-21 19:41:57,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 533 transitions, 10738 flow [2024-06-21 19:41:57,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:41:57,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:41:57,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-21 19:41:57,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2024-06-21 19:41:57,417 INFO L175 Difference]: Start difference. First operand has 255 places, 486 transitions, 9196 flow. Second operand 9 states and 148 transitions. [2024-06-21 19:41:57,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 533 transitions, 10738 flow [2024-06-21 19:41:57,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 533 transitions, 10611 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-21 19:41:57,969 INFO L231 Difference]: Finished difference. Result has 261 places, 503 transitions, 9787 flow [2024-06-21 19:41:57,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9109, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9787, PETRI_PLACES=261, PETRI_TRANSITIONS=503} [2024-06-21 19:41:57,969 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 220 predicate places. [2024-06-21 19:41:57,969 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 503 transitions, 9787 flow [2024-06-21 19:41:57,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:57,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:57,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:57,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 19:41:57,970 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 19:41:57,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:57,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1222194326, now seen corresponding path program 3 times [2024-06-21 19:41:57,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:57,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720826420] [2024-06-21 19:41:57,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:57,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:59,003 INFO 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 19:41:59,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:59,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720826420] [2024-06-21 19:41:59,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720826420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:59,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:59,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:41:59,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900407109] [2024-06-21 19:41:59,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:59,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:41:59,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:59,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:41:59,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:41:59,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:41:59,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 503 transitions, 9787 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:59,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:59,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:41:59,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:42:00,233 INFO L124 PetriNetUnfolderBase]: 2754/4144 cut-off events. [2024-06-21 19:42:00,233 INFO L125 PetriNetUnfolderBase]: For 299559/299642 co-relation queries the response was YES. [2024-06-21 19:42:00,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43478 conditions, 4144 events. 2754/4144 cut-off events. For 299559/299642 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 20997 event pairs, 488 based on Foata normal form. 15/4070 useless extension candidates. Maximal degree in co-relation 43356. Up to 3552 conditions per place. [2024-06-21 19:42:00,286 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 297 selfloop transitions, 154 changer transitions 0/542 dead transitions. [2024-06-21 19:42:00,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 542 transitions, 10897 flow [2024-06-21 19:42:00,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:42:00,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:42:00,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-21 19:42:00,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 19:42:00,287 INFO L175 Difference]: Start difference. First operand has 261 places, 503 transitions, 9787 flow. Second operand 10 states and 170 transitions. [2024-06-21 19:42:00,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 542 transitions, 10897 flow [2024-06-21 19:42:00,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 542 transitions, 10705 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-21 19:42:00,980 INFO L231 Difference]: Finished difference. Result has 267 places, 507 transitions, 10016 flow [2024-06-21 19:42:00,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9595, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10016, PETRI_PLACES=267, PETRI_TRANSITIONS=507} [2024-06-21 19:42:00,981 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 226 predicate places. [2024-06-21 19:42:00,981 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 507 transitions, 10016 flow [2024-06-21 19:42:00,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:00,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:42:00,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:42:00,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 19:42:00,982 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 19:42:00,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:42:00,982 INFO L85 PathProgramCache]: Analyzing trace with hash 961167292, now seen corresponding path program 4 times [2024-06-21 19:42:00,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:42:00,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352537077] [2024-06-21 19:42:00,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:42:00,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:42:00,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:42:01,961 INFO 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 19:42:01,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:42:01,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352537077] [2024-06-21 19:42:01,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352537077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:42:01,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:42:01,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:42:01,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268797060] [2024-06-21 19:42:01,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:42:01,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:42:01,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:42:01,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:42:01,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:42:02,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:42:02,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 507 transitions, 10016 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:02,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:42:02,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:42:02,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:42:03,204 INFO L124 PetriNetUnfolderBase]: 2849/4292 cut-off events. [2024-06-21 19:42:03,204 INFO L125 PetriNetUnfolderBase]: For 317422/317602 co-relation queries the response was YES. [2024-06-21 19:42:03,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44652 conditions, 4292 events. 2849/4292 cut-off events. For 317422/317602 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 22055 event pairs, 442 based on Foata normal form. 72/4261 useless extension candidates. Maximal degree in co-relation 44529. Up to 3716 conditions per place. [2024-06-21 19:42:03,259 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 351 selfloop transitions, 112 changer transitions 0/554 dead transitions. [2024-06-21 19:42:03,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 554 transitions, 11237 flow [2024-06-21 19:42:03,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:42:03,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:42:03,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 19:42:03,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 19:42:03,260 INFO L175 Difference]: Start difference. First operand has 267 places, 507 transitions, 10016 flow. Second operand 9 states and 156 transitions. [2024-06-21 19:42:03,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 554 transitions, 11237 flow [2024-06-21 19:42:03,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 554 transitions, 10896 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-21 19:42:03,942 INFO L231 Difference]: Finished difference. Result has 270 places, 523 transitions, 10147 flow [2024-06-21 19:42:03,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9675, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10147, PETRI_PLACES=270, PETRI_TRANSITIONS=523} [2024-06-21 19:42:03,943 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 229 predicate places. [2024-06-21 19:42:03,943 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 523 transitions, 10147 flow [2024-06-21 19:42:03,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:03,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:42:03,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:42:03,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 19:42:03,944 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 19:42:03,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:42:03,944 INFO L85 PathProgramCache]: Analyzing trace with hash -726729020, now seen corresponding path program 3 times [2024-06-21 19:42:03,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:42:03,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168277711] [2024-06-21 19:42:03,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:42:03,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:42:03,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:42:04,987 INFO 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 19:42:04,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:42:04,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168277711] [2024-06-21 19:42:04,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168277711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:42:04,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:42:04,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:42:04,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672969500] [2024-06-21 19:42:04,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:42:04,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:42:04,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:42:04,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:42:04,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:42:05,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:42:05,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 523 transitions, 10147 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:05,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:42:05,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:42:05,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:42:06,259 INFO L124 PetriNetUnfolderBase]: 3083/4598 cut-off events. [2024-06-21 19:42:06,259 INFO L125 PetriNetUnfolderBase]: For 299463/299469 co-relation queries the response was YES. [2024-06-21 19:42:06,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46417 conditions, 4598 events. 3083/4598 cut-off events. For 299463/299469 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 23398 event pairs, 568 based on Foata normal form. 9/4606 useless extension candidates. Maximal degree in co-relation 46292. Up to 4303 conditions per place. [2024-06-21 19:42:06,319 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 454 selfloop transitions, 115 changer transitions 0/572 dead transitions. [2024-06-21 19:42:06,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 572 transitions, 11755 flow [2024-06-21 19:42:06,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:42:06,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:42:06,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-21 19:42:06,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41388888888888886 [2024-06-21 19:42:06,321 INFO L175 Difference]: Start difference. First operand has 270 places, 523 transitions, 10147 flow. Second operand 9 states and 149 transitions. [2024-06-21 19:42:06,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 572 transitions, 11755 flow [2024-06-21 19:42:07,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 572 transitions, 11475 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-21 19:42:07,213 INFO L231 Difference]: Finished difference. Result has 274 places, 544 transitions, 10579 flow [2024-06-21 19:42:07,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9867, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10579, PETRI_PLACES=274, PETRI_TRANSITIONS=544} [2024-06-21 19:42:07,214 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 233 predicate places. [2024-06-21 19:42:07,214 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 544 transitions, 10579 flow [2024-06-21 19:42:07,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:07,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:42:07,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:42:07,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 19:42:07,214 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 19:42:07,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:42:07,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1741147904, now seen corresponding path program 5 times [2024-06-21 19:42:07,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:42:07,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377176961] [2024-06-21 19:42:07,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:42:07,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:42:07,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:42:08,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:42:08,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:42:08,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377176961] [2024-06-21 19:42:08,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377176961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:42:08,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:42:08,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:42:08,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154663237] [2024-06-21 19:42:08,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:42:08,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:42:08,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:42:08,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:42:08,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:42:08,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:42:08,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 544 transitions, 10579 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:08,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:42:08,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:42:08,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:42:09,597 INFO L124 PetriNetUnfolderBase]: 2942/4450 cut-off events. [2024-06-21 19:42:09,597 INFO L125 PetriNetUnfolderBase]: For 345256/345577 co-relation queries the response was YES. [2024-06-21 19:42:09,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46255 conditions, 4450 events. 2942/4450 cut-off events. For 345256/345577 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 23158 event pairs, 476 based on Foata normal form. 70/4420 useless extension candidates. Maximal degree in co-relation 46128. Up to 3821 conditions per place. [2024-06-21 19:42:09,650 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 333 selfloop transitions, 145 changer transitions 0/581 dead transitions. [2024-06-21 19:42:09,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 581 transitions, 11761 flow [2024-06-21 19:42:09,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:42:09,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:42:09,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 19:42:09,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 19:42:09,652 INFO L175 Difference]: Start difference. First operand has 274 places, 544 transitions, 10579 flow. Second operand 9 states and 156 transitions. [2024-06-21 19:42:09,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 581 transitions, 11761 flow [2024-06-21 19:42:10,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 581 transitions, 11629 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 19:42:10,570 INFO L231 Difference]: Finished difference. Result has 280 places, 552 transitions, 10902 flow [2024-06-21 19:42:10,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10447, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10902, PETRI_PLACES=280, PETRI_TRANSITIONS=552} [2024-06-21 19:42:10,571 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 239 predicate places. [2024-06-21 19:42:10,571 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 552 transitions, 10902 flow [2024-06-21 19:42:10,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:10,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:42:10,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:42:10,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 19:42:10,572 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 19:42:10,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:42:10,572 INFO L85 PathProgramCache]: Analyzing trace with hash -684364116, now seen corresponding path program 1 times [2024-06-21 19:42:10,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:42:10,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65973599] [2024-06-21 19:42:10,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:42:10,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:42:10,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:42:11,920 INFO 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 19:42:11,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:42:11,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65973599] [2024-06-21 19:42:11,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65973599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:42:11,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:42:11,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:42:11,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120467873] [2024-06-21 19:42:11,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:42:11,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:42:11,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:42:11,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:42:11,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:42:12,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:42:12,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 552 transitions, 10902 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:12,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:42:12,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:42:12,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:42:13,306 INFO L124 PetriNetUnfolderBase]: 3207/4784 cut-off events. [2024-06-21 19:42:13,306 INFO L125 PetriNetUnfolderBase]: For 329670/329676 co-relation queries the response was YES. [2024-06-21 19:42:13,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48534 conditions, 4784 events. 3207/4784 cut-off events. For 329670/329676 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 24498 event pairs, 577 based on Foata normal form. 11/4794 useless extension candidates. Maximal degree in co-relation 48406. Up to 4251 conditions per place. [2024-06-21 19:42:13,364 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 410 selfloop transitions, 182 changer transitions 0/595 dead transitions. [2024-06-21 19:42:13,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 595 transitions, 12397 flow [2024-06-21 19:42:13,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:42:13,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:42:13,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-21 19:42:13,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415 [2024-06-21 19:42:13,366 INFO L175 Difference]: Start difference. First operand has 280 places, 552 transitions, 10902 flow. Second operand 10 states and 166 transitions. [2024-06-21 19:42:13,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 595 transitions, 12397 flow [2024-06-21 19:42:14,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 595 transitions, 12099 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-21 19:42:14,230 INFO L231 Difference]: Finished difference. Result has 284 places, 560 transitions, 11120 flow [2024-06-21 19:42:14,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10604, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11120, PETRI_PLACES=284, PETRI_TRANSITIONS=560} [2024-06-21 19:42:14,231 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 243 predicate places. [2024-06-21 19:42:14,231 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 560 transitions, 11120 flow [2024-06-21 19:42:14,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:14,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:42:14,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:42:14,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 19:42:14,232 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 19:42:14,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:42:14,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1029222670, now seen corresponding path program 1 times [2024-06-21 19:42:14,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:42:14,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519687266] [2024-06-21 19:42:14,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:42:14,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:42:14,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:42:15,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:42:15,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:42:15,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519687266] [2024-06-21 19:42:15,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519687266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:42:15,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:42:15,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:42:15,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768091925] [2024-06-21 19:42:15,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:42:15,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:42:15,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:42:15,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:42:15,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:42:15,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:42:15,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 560 transitions, 11120 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:15,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:42:15,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:42:15,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:42:16,991 INFO L124 PetriNetUnfolderBase]: 3317/4962 cut-off events. [2024-06-21 19:42:16,991 INFO L125 PetriNetUnfolderBase]: For 366662/366668 co-relation queries the response was YES. [2024-06-21 19:42:17,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50292 conditions, 4962 events. 3317/4962 cut-off events. For 366662/366668 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 25718 event pairs, 577 based on Foata normal form. 30/4991 useless extension candidates. Maximal degree in co-relation 50163. Up to 4325 conditions per place. [2024-06-21 19:42:17,046 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 425 selfloop transitions, 178 changer transitions 0/606 dead transitions. [2024-06-21 19:42:17,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 606 transitions, 12675 flow [2024-06-21 19:42:17,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:42:17,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:42:17,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-21 19:42:17,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4225 [2024-06-21 19:42:17,048 INFO L175 Difference]: Start difference. First operand has 284 places, 560 transitions, 11120 flow. Second operand 10 states and 169 transitions. [2024-06-21 19:42:17,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 606 transitions, 12675 flow [2024-06-21 19:42:17,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 606 transitions, 12308 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-21 19:42:17,888 INFO L231 Difference]: Finished difference. Result has 288 places, 570 transitions, 11355 flow [2024-06-21 19:42:17,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10765, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11355, PETRI_PLACES=288, PETRI_TRANSITIONS=570} [2024-06-21 19:42:17,888 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 247 predicate places. [2024-06-21 19:42:17,889 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 570 transitions, 11355 flow [2024-06-21 19:42:17,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:17,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:42:17,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:42:17,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 19:42:17,889 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:42:17,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:42:17,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1723403654, now seen corresponding path program 6 times [2024-06-21 19:42:17,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:42:17,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313500029] [2024-06-21 19:42:17,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:42:17,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:42:17,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:42:18,881 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 19:42:18,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:42:18,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313500029] [2024-06-21 19:42:18,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313500029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:42:18,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:42:18,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:42:18,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003661457] [2024-06-21 19:42:18,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:42:18,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:42:18,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:42:18,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:42:18,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:42:18,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:42:18,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 570 transitions, 11355 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:18,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:42:18,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:42:18,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:42:20,421 INFO L124 PetriNetUnfolderBase]: 3172/4818 cut-off events. [2024-06-21 19:42:20,421 INFO L125 PetriNetUnfolderBase]: For 382850/383306 co-relation queries the response was YES. [2024-06-21 19:42:20,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50247 conditions, 4818 events. 3172/4818 cut-off events. For 382850/383306 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 25795 event pairs, 494 based on Foata normal form. 135/4822 useless extension candidates. Maximal degree in co-relation 50116. Up to 4173 conditions per place. [2024-06-21 19:42:20,493 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 391 selfloop transitions, 113 changer transitions 0/613 dead transitions. [2024-06-21 19:42:20,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 613 transitions, 12694 flow [2024-06-21 19:42:20,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:42:20,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:42:20,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-21 19:42:20,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41388888888888886 [2024-06-21 19:42:20,494 INFO L175 Difference]: Start difference. First operand has 288 places, 570 transitions, 11355 flow. Second operand 9 states and 149 transitions. [2024-06-21 19:42:20,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 613 transitions, 12694 flow [2024-06-21 19:42:21,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 613 transitions, 12400 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-21 19:42:21,364 INFO L231 Difference]: Finished difference. Result has 291 places, 588 transitions, 11602 flow [2024-06-21 19:42:21,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11061, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11602, PETRI_PLACES=291, PETRI_TRANSITIONS=588} [2024-06-21 19:42:21,365 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 250 predicate places. [2024-06-21 19:42:21,365 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 588 transitions, 11602 flow [2024-06-21 19:42:21,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:21,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:42:21,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:42:21,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 19:42:21,365 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 19:42:21,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:42:21,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1723464228, now seen corresponding path program 4 times [2024-06-21 19:42:21,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:42:21,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163830390] [2024-06-21 19:42:21,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:42:21,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:42:21,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:42:22,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:42:22,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:42:22,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163830390] [2024-06-21 19:42:22,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163830390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:42:22,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:42:22,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:42:22,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5832254] [2024-06-21 19:42:22,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:42:22,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:42:22,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:42:22,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:42:22,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:42:22,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:42:22,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 588 transitions, 11602 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:22,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:42:22,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:42:22,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:42:23,939 INFO L124 PetriNetUnfolderBase]: 3497/5245 cut-off events. [2024-06-21 19:42:23,939 INFO L125 PetriNetUnfolderBase]: For 370715/370721 co-relation queries the response was YES. [2024-06-21 19:42:23,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53159 conditions, 5245 events. 3497/5245 cut-off events. For 370715/370721 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 27865 event pairs, 659 based on Foata normal form. 10/5251 useless extension candidates. Maximal degree in co-relation 53026. Up to 4944 conditions per place. [2024-06-21 19:42:24,010 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 500 selfloop transitions, 113 changer transitions 0/616 dead transitions. [2024-06-21 19:42:24,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 616 transitions, 13035 flow [2024-06-21 19:42:24,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:42:24,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:42:24,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 19:42:24,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39444444444444443 [2024-06-21 19:42:24,011 INFO L175 Difference]: Start difference. First operand has 291 places, 588 transitions, 11602 flow. Second operand 9 states and 142 transitions. [2024-06-21 19:42:24,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 616 transitions, 13035 flow [2024-06-21 19:42:24,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 616 transitions, 12783 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-21 19:42:24,997 INFO L231 Difference]: Finished difference. Result has 296 places, 594 transitions, 11792 flow [2024-06-21 19:42:24,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11350, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11792, PETRI_PLACES=296, PETRI_TRANSITIONS=594} [2024-06-21 19:42:24,998 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 255 predicate places. [2024-06-21 19:42:24,998 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 594 transitions, 11792 flow [2024-06-21 19:42:24,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:24,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:42:24,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:42:24,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 19:42:24,999 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 19:42:24,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:42:24,999 INFO L85 PathProgramCache]: Analyzing trace with hash -613312244, now seen corresponding path program 7 times [2024-06-21 19:42:24,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:42:24,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473722721] [2024-06-21 19:42:24,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:42:25,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:42:25,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:42:26,174 INFO 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 19:42:26,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:42:26,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473722721] [2024-06-21 19:42:26,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473722721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:42:26,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:42:26,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:42:26,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628135287] [2024-06-21 19:42:26,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:42:26,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:42:26,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:42:26,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:42:26,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:42:26,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:42:26,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 594 transitions, 11792 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:26,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:42:26,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:42:26,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:42:27,649 INFO L124 PetriNetUnfolderBase]: 3250/4961 cut-off events. [2024-06-21 19:42:27,649 INFO L125 PetriNetUnfolderBase]: For 407827/408380 co-relation queries the response was YES. [2024-06-21 19:42:27,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51850 conditions, 4961 events. 3250/4961 cut-off events. For 407827/408380 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 26965 event pairs, 519 based on Foata normal form. 120/4947 useless extension candidates. Maximal degree in co-relation 51715. Up to 4275 conditions per place. [2024-06-21 19:42:27,716 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 372 selfloop transitions, 146 changer transitions 0/629 dead transitions. [2024-06-21 19:42:27,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 629 transitions, 13088 flow [2024-06-21 19:42:27,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:42:27,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:42:27,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-21 19:42:27,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41388888888888886 [2024-06-21 19:42:27,717 INFO L175 Difference]: Start difference. First operand has 296 places, 594 transitions, 11792 flow. Second operand 9 states and 149 transitions. [2024-06-21 19:42:27,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 629 transitions, 13088 flow [2024-06-21 19:42:28,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 629 transitions, 12883 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 19:42:28,581 INFO L231 Difference]: Finished difference. Result has 300 places, 606 transitions, 12112 flow [2024-06-21 19:42:28,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11587, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12112, PETRI_PLACES=300, PETRI_TRANSITIONS=606} [2024-06-21 19:42:28,582 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 259 predicate places. [2024-06-21 19:42:28,582 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 606 transitions, 12112 flow [2024-06-21 19:42:28,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:28,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:42:28,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:42:28,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 19:42:28,583 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 19:42:28,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:42:28,583 INFO L85 PathProgramCache]: Analyzing trace with hash -495224440, now seen corresponding path program 5 times [2024-06-21 19:42:28,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:42:28,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212409162] [2024-06-21 19:42:28,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:42:28,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:42:28,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:42:29,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:42:29,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:42:29,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212409162] [2024-06-21 19:42:29,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212409162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:42:29,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:42:29,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:42:29,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866273283] [2024-06-21 19:42:29,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:42:29,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:42:29,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:42:29,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:42:29,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:42:29,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:42:29,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 606 transitions, 12112 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:29,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:42:29,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:42:29,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:42:31,331 INFO L124 PetriNetUnfolderBase]: 3635/5449 cut-off events. [2024-06-21 19:42:31,331 INFO L125 PetriNetUnfolderBase]: For 398129/398135 co-relation queries the response was YES. [2024-06-21 19:42:31,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55604 conditions, 5449 events. 3635/5449 cut-off events. For 398129/398135 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 29156 event pairs, 653 based on Foata normal form. 8/5453 useless extension candidates. Maximal degree in co-relation 55468. Up to 5032 conditions per place. [2024-06-21 19:42:31,406 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 496 selfloop transitions, 141 changer transitions 0/640 dead transitions. [2024-06-21 19:42:31,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 640 transitions, 13936 flow [2024-06-21 19:42:31,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:42:31,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:42:31,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 19:42:31,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-21 19:42:31,408 INFO L175 Difference]: Start difference. First operand has 300 places, 606 transitions, 12112 flow. Second operand 8 states and 141 transitions. [2024-06-21 19:42:31,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 640 transitions, 13936 flow [2024-06-21 19:42:32,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 640 transitions, 13585 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-21 19:42:32,613 INFO L231 Difference]: Finished difference. Result has 301 places, 616 transitions, 12321 flow [2024-06-21 19:42:32,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11761, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12321, PETRI_PLACES=301, PETRI_TRANSITIONS=616} [2024-06-21 19:42:32,614 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 260 predicate places. [2024-06-21 19:42:32,614 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 616 transitions, 12321 flow [2024-06-21 19:42:32,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:32,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:42:32,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:42:32,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 19:42:32,615 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 19:42:32,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:42:32,616 INFO L85 PathProgramCache]: Analyzing trace with hash -495224564, now seen corresponding path program 8 times [2024-06-21 19:42:32,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:42:32,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81296111] [2024-06-21 19:42:32,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:42:32,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:42:32,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:42:33,860 INFO 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 19:42:33,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:42:33,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81296111] [2024-06-21 19:42:33,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81296111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:42:33,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:42:33,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:42:33,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737914435] [2024-06-21 19:42:33,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:42:33,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:42:33,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:42:33,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:42:33,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:42:33,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:42:33,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 616 transitions, 12321 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:33,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:42:33,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:42:33,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:42:35,312 INFO L124 PetriNetUnfolderBase]: 3287/5009 cut-off events. [2024-06-21 19:42:35,312 INFO L125 PetriNetUnfolderBase]: For 437340/437900 co-relation queries the response was YES. [2024-06-21 19:42:35,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53312 conditions, 5009 events. 3287/5009 cut-off events. For 437340/437900 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 27212 event pairs, 500 based on Foata normal form. 120/4988 useless extension candidates. Maximal degree in co-relation 53175. Up to 4319 conditions per place. [2024-06-21 19:42:35,379 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 369 selfloop transitions, 160 changer transitions 0/643 dead transitions. [2024-06-21 19:42:35,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 643 transitions, 13587 flow [2024-06-21 19:42:35,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:42:35,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:42:35,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 19:42:35,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-21 19:42:35,381 INFO L175 Difference]: Start difference. First operand has 301 places, 616 transitions, 12321 flow. Second operand 9 states and 151 transitions. [2024-06-21 19:42:35,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 643 transitions, 13587 flow [2024-06-21 19:42:36,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 643 transitions, 13325 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-21 19:42:36,653 INFO L231 Difference]: Finished difference. Result has 305 places, 620 transitions, 12523 flow [2024-06-21 19:42:36,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12059, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12523, PETRI_PLACES=305, PETRI_TRANSITIONS=620} [2024-06-21 19:42:36,654 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 264 predicate places. [2024-06-21 19:42:36,654 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 620 transitions, 12523 flow [2024-06-21 19:42:36,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:36,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:42:36,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:42:36,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 19:42:36,654 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 19:42:36,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:42:36,655 INFO L85 PathProgramCache]: Analyzing trace with hash -495046810, now seen corresponding path program 6 times [2024-06-21 19:42:36,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:42:36,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549068342] [2024-06-21 19:42:36,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:42:36,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:42:36,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:42:37,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:42:37,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:42:37,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549068342] [2024-06-21 19:42:37,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549068342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:42:37,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:42:37,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:42:37,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662268480] [2024-06-21 19:42:37,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:42:37,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:42:37,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:42:37,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:42:37,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:42:37,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:42:37,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 620 transitions, 12523 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:37,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:42:37,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:42:37,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:42:39,443 INFO L124 PetriNetUnfolderBase]: 3674/5510 cut-off events. [2024-06-21 19:42:39,443 INFO L125 PetriNetUnfolderBase]: For 420195/420201 co-relation queries the response was YES. [2024-06-21 19:42:39,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56787 conditions, 5510 events. 3674/5510 cut-off events. For 420195/420201 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 29558 event pairs, 659 based on Foata normal form. 8/5514 useless extension candidates. Maximal degree in co-relation 56649. Up to 5095 conditions per place. [2024-06-21 19:42:39,508 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 488 selfloop transitions, 151 changer transitions 0/642 dead transitions. [2024-06-21 19:42:39,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 642 transitions, 13883 flow [2024-06-21 19:42:39,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:42:39,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:42:39,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-21 19:42:39,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2024-06-21 19:42:39,509 INFO L175 Difference]: Start difference. First operand has 305 places, 620 transitions, 12523 flow. Second operand 9 states and 145 transitions. [2024-06-21 19:42:39,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 642 transitions, 13883 flow [2024-06-21 19:42:40,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 642 transitions, 13425 flow, removed 83 selfloop flow, removed 6 redundant places. [2024-06-21 19:42:40,694 INFO L231 Difference]: Finished difference. Result has 308 places, 620 transitions, 12383 flow [2024-06-21 19:42:40,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12065, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12383, PETRI_PLACES=308, PETRI_TRANSITIONS=620} [2024-06-21 19:42:40,694 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 267 predicate places. [2024-06-21 19:42:40,694 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 620 transitions, 12383 flow [2024-06-21 19:42:40,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:40,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:42:40,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:42:40,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 19:42:40,695 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:42:40,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:42:40,695 INFO L85 PathProgramCache]: Analyzing trace with hash -495039866, now seen corresponding path program 2 times [2024-06-21 19:42:40,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:42:40,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537091177] [2024-06-21 19:42:40,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:42:40,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:42:40,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:42:42,062 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 19:42:42,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:42:42,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537091177] [2024-06-21 19:42:42,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537091177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:42:42,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:42:42,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:42:42,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912935875] [2024-06-21 19:42:42,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:42:42,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:42:42,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:42:42,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:42:42,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:42:42,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:42:42,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 620 transitions, 12383 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:42,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:42:42,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:42:42,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:42:43,769 INFO L124 PetriNetUnfolderBase]: 3826/5758 cut-off events. [2024-06-21 19:42:43,769 INFO L125 PetriNetUnfolderBase]: For 464829/464835 co-relation queries the response was YES. [2024-06-21 19:42:43,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58163 conditions, 5758 events. 3826/5758 cut-off events. For 464829/464835 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 31327 event pairs, 675 based on Foata normal form. 30/5784 useless extension candidates. Maximal degree in co-relation 58024. Up to 5143 conditions per place. [2024-06-21 19:42:43,848 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 515 selfloop transitions, 140 changer transitions 0/658 dead transitions. [2024-06-21 19:42:43,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 658 transitions, 13983 flow [2024-06-21 19:42:43,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:42:43,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:42:43,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-21 19:42:43,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41 [2024-06-21 19:42:43,850 INFO L175 Difference]: Start difference. First operand has 308 places, 620 transitions, 12383 flow. Second operand 10 states and 164 transitions. [2024-06-21 19:42:43,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 658 transitions, 13983 flow [2024-06-21 19:42:45,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 658 transitions, 13725 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 19:42:45,119 INFO L231 Difference]: Finished difference. Result has 312 places, 624 transitions, 12509 flow [2024-06-21 19:42:45,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12125, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12509, PETRI_PLACES=312, PETRI_TRANSITIONS=624} [2024-06-21 19:42:45,120 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 271 predicate places. [2024-06-21 19:42:45,120 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 624 transitions, 12509 flow [2024-06-21 19:42:45,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:45,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:42:45,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:42:45,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 19:42:45,120 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:42:45,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:42:45,121 INFO L85 PathProgramCache]: Analyzing trace with hash -58251434, now seen corresponding path program 2 times [2024-06-21 19:42:45,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:42:45,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087968809] [2024-06-21 19:42:45,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:42:45,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:42:45,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:42:46,496 INFO 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 19:42:46,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:42:46,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087968809] [2024-06-21 19:42:46,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087968809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:42:46,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:42:46,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:42:46,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539096384] [2024-06-21 19:42:46,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:42:46,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:42:46,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:42:46,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:42:46,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:42:46,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:42:46,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 624 transitions, 12509 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:46,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:42:46,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:42:46,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:42:48,038 INFO L124 PetriNetUnfolderBase]: 3848/5793 cut-off events. [2024-06-21 19:42:48,038 INFO L125 PetriNetUnfolderBase]: For 452132/452140 co-relation queries the response was YES. [2024-06-21 19:42:48,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59150 conditions, 5793 events. 3848/5793 cut-off events. For 452132/452140 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 31671 event pairs, 687 based on Foata normal form. 12/5801 useless extension candidates. Maximal degree in co-relation 59010. Up to 5175 conditions per place. [2024-06-21 19:42:48,115 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 435 selfloop transitions, 217 changer transitions 0/655 dead transitions. [2024-06-21 19:42:48,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 655 transitions, 14039 flow [2024-06-21 19:42:48,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:42:48,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:42:48,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-21 19:42:48,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025 [2024-06-21 19:42:48,117 INFO L175 Difference]: Start difference. First operand has 312 places, 624 transitions, 12509 flow. Second operand 10 states and 161 transitions. [2024-06-21 19:42:48,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 655 transitions, 14039 flow [2024-06-21 19:42:49,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 655 transitions, 13805 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 19:42:49,448 INFO L231 Difference]: Finished difference. Result has 315 places, 627 transitions, 12787 flow [2024-06-21 19:42:49,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12275, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12787, PETRI_PLACES=315, PETRI_TRANSITIONS=627} [2024-06-21 19:42:49,448 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 274 predicate places. [2024-06-21 19:42:49,448 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 627 transitions, 12787 flow [2024-06-21 19:42:49,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:49,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:42:49,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:42:49,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 19:42:49,449 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 19:42:49,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:42:49,450 INFO L85 PathProgramCache]: Analyzing trace with hash -58251186, now seen corresponding path program 3 times [2024-06-21 19:42:49,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:42:49,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163051395] [2024-06-21 19:42:49,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:42:49,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:42:49,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:42:50,999 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 19:42:51,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:42:51,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163051395] [2024-06-21 19:42:51,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163051395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:42:51,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:42:51,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:42:51,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900729576] [2024-06-21 19:42:51,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:42:51,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:42:51,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:42:51,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:42:51,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:42:51,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:42:51,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 627 transitions, 12787 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:51,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:42:51,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:42:51,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:42:52,780 INFO L124 PetriNetUnfolderBase]: 3865/5831 cut-off events. [2024-06-21 19:42:52,781 INFO L125 PetriNetUnfolderBase]: For 468088/468094 co-relation queries the response was YES. [2024-06-21 19:42:52,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60336 conditions, 5831 events. 3865/5831 cut-off events. For 468088/468094 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 32157 event pairs, 1148 based on Foata normal form. 10/5839 useless extension candidates. Maximal degree in co-relation 60195. Up to 5642 conditions per place. [2024-06-21 19:42:52,850 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 602 selfloop transitions, 53 changer transitions 0/658 dead transitions. [2024-06-21 19:42:52,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 658 transitions, 14281 flow [2024-06-21 19:42:52,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:42:52,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:42:52,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 149 transitions. [2024-06-21 19:42:52,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3725 [2024-06-21 19:42:52,852 INFO L175 Difference]: Start difference. First operand has 315 places, 627 transitions, 12787 flow. Second operand 10 states and 149 transitions. [2024-06-21 19:42:52,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 658 transitions, 14281 flow [2024-06-21 19:42:53,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 658 transitions, 13793 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-21 19:42:53,924 INFO L231 Difference]: Finished difference. Result has 318 places, 631 transitions, 12504 flow [2024-06-21 19:42:53,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12303, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12504, PETRI_PLACES=318, PETRI_TRANSITIONS=631} [2024-06-21 19:42:53,925 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 277 predicate places. [2024-06-21 19:42:53,925 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 631 transitions, 12504 flow [2024-06-21 19:42:53,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:53,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:42:53,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:42:53,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 19:42:53,926 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 19:42:53,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:42:53,926 INFO L85 PathProgramCache]: Analyzing trace with hash -49680306, now seen corresponding path program 4 times [2024-06-21 19:42:53,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:42:53,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408985710] [2024-06-21 19:42:53,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:42:53,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:42:53,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:42:55,238 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 19:42:55,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:42:55,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408985710] [2024-06-21 19:42:55,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408985710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:42:55,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:42:55,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:42:55,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435999981] [2024-06-21 19:42:55,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:42:55,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:42:55,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:42:55,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:42:55,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:42:55,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:42:55,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 631 transitions, 12504 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:55,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:42:55,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:42:55,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:42:56,992 INFO L124 PetriNetUnfolderBase]: 3976/6000 cut-off events. [2024-06-21 19:42:56,993 INFO L125 PetriNetUnfolderBase]: For 491110/491118 co-relation queries the response was YES. [2024-06-21 19:42:57,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61768 conditions, 6000 events. 3976/6000 cut-off events. For 491110/491118 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 33027 event pairs, 623 based on Foata normal form. 12/6008 useless extension candidates. Maximal degree in co-relation 61625. Up to 4791 conditions per place. [2024-06-21 19:42:57,077 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 423 selfloop transitions, 254 changer transitions 0/680 dead transitions. [2024-06-21 19:42:57,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 680 transitions, 14798 flow [2024-06-21 19:42:57,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:42:57,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:42:57,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 19:42:57,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 19:42:57,079 INFO L175 Difference]: Start difference. First operand has 318 places, 631 transitions, 12504 flow. Second operand 9 states and 162 transitions. [2024-06-21 19:42:57,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 680 transitions, 14798 flow [2024-06-21 19:42:58,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 680 transitions, 14645 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 19:42:58,430 INFO L231 Difference]: Finished difference. Result has 323 places, 645 transitions, 13285 flow [2024-06-21 19:42:58,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12351, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13285, PETRI_PLACES=323, PETRI_TRANSITIONS=645} [2024-06-21 19:42:58,430 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 282 predicate places. [2024-06-21 19:42:58,431 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 645 transitions, 13285 flow [2024-06-21 19:42:58,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:58,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:42:58,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:42:58,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 19:42:58,431 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:42:58,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:42:58,431 INFO L85 PathProgramCache]: Analyzing trace with hash -49977224, now seen corresponding path program 3 times [2024-06-21 19:42:58,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:42:58,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209927448] [2024-06-21 19:42:58,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:42:58,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:42:58,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:42:59,820 INFO 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 19:42:59,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:42:59,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209927448] [2024-06-21 19:42:59,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209927448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:42:59,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:42:59,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:42:59,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648903667] [2024-06-21 19:42:59,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:42:59,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:42:59,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:42:59,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:42:59,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:42:59,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:42:59,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 645 transitions, 13285 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:59,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:42:59,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:42:59,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:43:01,400 INFO L124 PetriNetUnfolderBase]: 4030/6078 cut-off events. [2024-06-21 19:43:01,400 INFO L125 PetriNetUnfolderBase]: For 519854/519862 co-relation queries the response was YES. [2024-06-21 19:43:01,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64506 conditions, 6078 events. 4030/6078 cut-off events. For 519854/519862 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 33660 event pairs, 711 based on Foata normal form. 12/6086 useless extension candidates. Maximal degree in co-relation 64359. Up to 5163 conditions per place. [2024-06-21 19:43:01,485 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 412 selfloop transitions, 269 changer transitions 0/684 dead transitions. [2024-06-21 19:43:01,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 684 transitions, 15267 flow [2024-06-21 19:43:01,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:43:01,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:43:01,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-21 19:43:01,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4075 [2024-06-21 19:43:01,487 INFO L175 Difference]: Start difference. First operand has 323 places, 645 transitions, 13285 flow. Second operand 10 states and 163 transitions. [2024-06-21 19:43:01,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 684 transitions, 15267 flow [2024-06-21 19:43:03,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 684 transitions, 14896 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-21 19:43:03,081 INFO L231 Difference]: Finished difference. Result has 329 places, 654 transitions, 13770 flow [2024-06-21 19:43:03,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12918, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13770, PETRI_PLACES=329, PETRI_TRANSITIONS=654} [2024-06-21 19:43:03,082 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 288 predicate places. [2024-06-21 19:43:03,082 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 654 transitions, 13770 flow [2024-06-21 19:43:03,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:03,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:43:03,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:43:03,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 19:43:03,083 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 19:43:03,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:43:03,083 INFO L85 PathProgramCache]: Analyzing trace with hash -286337034, now seen corresponding path program 9 times [2024-06-21 19:43:03,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:43:03,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651945124] [2024-06-21 19:43:03,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:43:03,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:43:03,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:43:04,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:43:04,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:43:04,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651945124] [2024-06-21 19:43:04,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651945124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:43:04,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:43:04,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:43:04,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227172975] [2024-06-21 19:43:04,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:43:04,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:43:04,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:43:04,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:43:04,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:43:04,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:43:04,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 654 transitions, 13770 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:04,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:43:04,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:43:04,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:43:06,105 INFO L124 PetriNetUnfolderBase]: 3600/5528 cut-off events. [2024-06-21 19:43:06,106 INFO L125 PetriNetUnfolderBase]: For 537285/537869 co-relation queries the response was YES. [2024-06-21 19:43:06,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61036 conditions, 5528 events. 3600/5528 cut-off events. For 537285/537869 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 30955 event pairs, 558 based on Foata normal form. 127/5523 useless extension candidates. Maximal degree in co-relation 60887. Up to 4599 conditions per place. [2024-06-21 19:43:06,176 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 327 selfloop transitions, 224 changer transitions 0/679 dead transitions. [2024-06-21 19:43:06,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 679 transitions, 15032 flow [2024-06-21 19:43:06,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:43:06,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:43:06,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-21 19:43:06,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41388888888888886 [2024-06-21 19:43:06,178 INFO L175 Difference]: Start difference. First operand has 329 places, 654 transitions, 13770 flow. Second operand 9 states and 149 transitions. [2024-06-21 19:43:06,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 679 transitions, 15032 flow [2024-06-21 19:43:07,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 679 transitions, 14671 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-21 19:43:07,689 INFO L231 Difference]: Finished difference. Result has 332 places, 656 transitions, 13940 flow [2024-06-21 19:43:07,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13409, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13940, PETRI_PLACES=332, PETRI_TRANSITIONS=656} [2024-06-21 19:43:07,690 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 291 predicate places. [2024-06-21 19:43:07,690 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 656 transitions, 13940 flow [2024-06-21 19:43:07,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:07,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:43:07,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:43:07,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 19:43:07,691 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 19:43:07,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:43:07,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1834165626, now seen corresponding path program 5 times [2024-06-21 19:43:07,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:43:07,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400314972] [2024-06-21 19:43:07,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:43:07,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:43:07,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:43:09,064 INFO 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 19:43:09,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:43:09,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400314972] [2024-06-21 19:43:09,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400314972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:43:09,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:43:09,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:43:09,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793321682] [2024-06-21 19:43:09,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:43:09,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:43:09,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:43:09,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:43:09,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:43:09,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:43:09,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 656 transitions, 13940 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:09,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:43:09,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:43:09,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:43:11,022 INFO L124 PetriNetUnfolderBase]: 4034/6086 cut-off events. [2024-06-21 19:43:11,022 INFO L125 PetriNetUnfolderBase]: For 537213/537221 co-relation queries the response was YES. [2024-06-21 19:43:11,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65823 conditions, 6086 events. 4034/6086 cut-off events. For 537213/537221 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 33685 event pairs, 709 based on Foata normal form. 12/6094 useless extension candidates. Maximal degree in co-relation 65672. Up to 5306 conditions per place. [2024-06-21 19:43:11,122 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 443 selfloop transitions, 241 changer transitions 0/687 dead transitions. [2024-06-21 19:43:11,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 687 transitions, 15722 flow [2024-06-21 19:43:11,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:43:11,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:43:11,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 19:43:11,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-21 19:43:11,124 INFO L175 Difference]: Start difference. First operand has 332 places, 656 transitions, 13940 flow. Second operand 9 states and 155 transitions. [2024-06-21 19:43:11,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 687 transitions, 15722 flow [2024-06-21 19:43:12,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 687 transitions, 15209 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-21 19:43:12,838 INFO L231 Difference]: Finished difference. Result has 334 places, 658 transitions, 13978 flow [2024-06-21 19:43:12,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13427, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13978, PETRI_PLACES=334, PETRI_TRANSITIONS=658} [2024-06-21 19:43:12,839 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 293 predicate places. [2024-06-21 19:43:12,839 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 658 transitions, 13978 flow [2024-06-21 19:43:12,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:12,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:43:12,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:43:12,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 19:43:12,839 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 19:43:12,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:43:12,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1842446780, now seen corresponding path program 7 times [2024-06-21 19:43:12,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:43:12,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510197268] [2024-06-21 19:43:12,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:43:12,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:43:12,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:43:14,070 INFO 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 19:43:14,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:43:14,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510197268] [2024-06-21 19:43:14,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510197268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:43:14,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:43:14,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:43:14,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796285056] [2024-06-21 19:43:14,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:43:14,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:43:14,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:43:14,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:43:14,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:43:14,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:43:14,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 658 transitions, 13978 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:14,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:43:14,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:43:14,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:43:15,739 INFO L124 PetriNetUnfolderBase]: 4045/6102 cut-off events. [2024-06-21 19:43:15,740 INFO L125 PetriNetUnfolderBase]: For 544517/544525 co-relation queries the response was YES. [2024-06-21 19:43:15,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66225 conditions, 6102 events. 4045/6102 cut-off events. For 544517/544525 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 33788 event pairs, 709 based on Foata normal form. 10/6108 useless extension candidates. Maximal degree in co-relation 66073. Up to 5304 conditions per place. [2024-06-21 19:43:15,824 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 433 selfloop transitions, 255 changer transitions 0/691 dead transitions. [2024-06-21 19:43:15,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 691 transitions, 15932 flow [2024-06-21 19:43:15,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:43:15,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:43:15,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 19:43:15,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-21 19:43:15,826 INFO L175 Difference]: Start difference. First operand has 334 places, 658 transitions, 13978 flow. Second operand 8 states and 139 transitions. [2024-06-21 19:43:15,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 691 transitions, 15932 flow [2024-06-21 19:43:17,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 691 transitions, 15403 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-21 19:43:17,775 INFO L231 Difference]: Finished difference. Result has 336 places, 667 transitions, 14324 flow [2024-06-21 19:43:17,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13449, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14324, PETRI_PLACES=336, PETRI_TRANSITIONS=667} [2024-06-21 19:43:17,775 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 295 predicate places. [2024-06-21 19:43:17,775 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 667 transitions, 14324 flow [2024-06-21 19:43:17,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:17,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:43:17,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:43:17,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 19:43:17,776 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 19:43:17,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:43:17,776 INFO L85 PathProgramCache]: Analyzing trace with hash -2070525560, now seen corresponding path program 8 times [2024-06-21 19:43:17,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:43:17,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677511418] [2024-06-21 19:43:17,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:43:17,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:43:17,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:43:19,119 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 19:43:19,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:43:19,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677511418] [2024-06-21 19:43:19,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677511418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:43:19,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:43:19,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:43:19,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265397913] [2024-06-21 19:43:19,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:43:19,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:43:19,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:43:19,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:43:19,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:43:19,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:43:19,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 667 transitions, 14324 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:19,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:43:19,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:43:19,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:43:20,908 INFO L124 PetriNetUnfolderBase]: 4056/6118 cut-off events. [2024-06-21 19:43:20,909 INFO L125 PetriNetUnfolderBase]: For 563286/563294 co-relation queries the response was YES. [2024-06-21 19:43:20,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67204 conditions, 6118 events. 4056/6118 cut-off events. For 563286/563294 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 33885 event pairs, 711 based on Foata normal form. 10/6124 useless extension candidates. Maximal degree in co-relation 67050. Up to 5316 conditions per place. [2024-06-21 19:43:20,998 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 463 selfloop transitions, 228 changer transitions 0/694 dead transitions. [2024-06-21 19:43:20,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 694 transitions, 16150 flow [2024-06-21 19:43:20,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:43:20,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:43:20,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 19:43:20,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-21 19:43:20,999 INFO L175 Difference]: Start difference. First operand has 336 places, 667 transitions, 14324 flow. Second operand 9 states and 147 transitions. [2024-06-21 19:43:20,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 694 transitions, 16150 flow [2024-06-21 19:43:22,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 694 transitions, 15967 flow, removed 57 selfloop flow, removed 4 redundant places. [2024-06-21 19:43:22,822 INFO L231 Difference]: Finished difference. Result has 341 places, 670 transitions, 14710 flow [2024-06-21 19:43:22,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14151, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14710, PETRI_PLACES=341, PETRI_TRANSITIONS=670} [2024-06-21 19:43:22,823 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 300 predicate places. [2024-06-21 19:43:22,823 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 670 transitions, 14710 flow [2024-06-21 19:43:22,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:22,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:43:22,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:43:22,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 19:43:22,824 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:43:22,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:43:22,824 INFO L85 PathProgramCache]: Analyzing trace with hash -286152336, now seen corresponding path program 6 times [2024-06-21 19:43:22,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:43:22,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967642008] [2024-06-21 19:43:22,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:43:22,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:43:22,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:43:24,331 INFO 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 19:43:24,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:43:24,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967642008] [2024-06-21 19:43:24,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967642008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:43:24,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:43:24,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:43:24,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593098167] [2024-06-21 19:43:24,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:43:24,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:43:24,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:43:24,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:43:24,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:43:24,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:43:24,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 670 transitions, 14710 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:24,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:43:24,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:43:24,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:43:26,083 INFO L124 PetriNetUnfolderBase]: 4048/6117 cut-off events. [2024-06-21 19:43:26,083 INFO L125 PetriNetUnfolderBase]: For 558028/558034 co-relation queries the response was YES. [2024-06-21 19:43:26,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67176 conditions, 6117 events. 4048/6117 cut-off events. For 558028/558034 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 34137 event pairs, 1168 based on Foata normal form. 10/6125 useless extension candidates. Maximal degree in co-relation 67021. Up to 5928 conditions per place. [2024-06-21 19:43:26,174 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 645 selfloop transitions, 50 changer transitions 0/698 dead transitions. [2024-06-21 19:43:26,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 698 transitions, 16233 flow [2024-06-21 19:43:26,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:43:26,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:43:26,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 150 transitions. [2024-06-21 19:43:26,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 19:43:26,176 INFO L175 Difference]: Start difference. First operand has 341 places, 670 transitions, 14710 flow. Second operand 10 states and 150 transitions. [2024-06-21 19:43:26,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 698 transitions, 16233 flow [2024-06-21 19:43:27,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 698 transitions, 15571 flow, removed 51 selfloop flow, removed 8 redundant places. [2024-06-21 19:43:27,689 INFO L231 Difference]: Finished difference. Result has 343 places, 671 transitions, 14186 flow [2024-06-21 19:43:27,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14048, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14186, PETRI_PLACES=343, PETRI_TRANSITIONS=671} [2024-06-21 19:43:27,690 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 302 predicate places. [2024-06-21 19:43:27,690 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 671 transitions, 14186 flow [2024-06-21 19:43:27,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:27,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:43:27,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:43:27,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 19:43:27,691 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:43:27,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:43:27,692 INFO L85 PathProgramCache]: Analyzing trace with hash -2070347744, now seen corresponding path program 4 times [2024-06-21 19:43:27,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:43:27,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882529380] [2024-06-21 19:43:27,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:43:27,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:43:27,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:43:29,182 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 19:43:29,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:43:29,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882529380] [2024-06-21 19:43:29,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882529380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:43:29,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:43:29,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:43:29,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478653683] [2024-06-21 19:43:29,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:43:29,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:43:29,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:43:29,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:43:29,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:43:29,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:43:29,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 671 transitions, 14186 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:29,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:43:29,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:43:29,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:43:30,937 INFO L124 PetriNetUnfolderBase]: 4038/6092 cut-off events. [2024-06-21 19:43:30,937 INFO L125 PetriNetUnfolderBase]: For 543946/543954 co-relation queries the response was YES. [2024-06-21 19:43:30,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65683 conditions, 6092 events. 4038/6092 cut-off events. For 543946/543954 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 33731 event pairs, 705 based on Foata normal form. 12/6100 useless extension candidates. Maximal degree in co-relation 65529. Up to 5487 conditions per place. [2024-06-21 19:43:31,023 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 498 selfloop transitions, 197 changer transitions 0/698 dead transitions. [2024-06-21 19:43:31,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 698 transitions, 15703 flow [2024-06-21 19:43:31,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:43:31,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:43:31,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-21 19:43:31,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 19:43:31,025 INFO L175 Difference]: Start difference. First operand has 343 places, 671 transitions, 14186 flow. Second operand 10 states and 160 transitions. [2024-06-21 19:43:31,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 698 transitions, 15703 flow [2024-06-21 19:43:32,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 698 transitions, 15512 flow, removed 47 selfloop flow, removed 8 redundant places. [2024-06-21 19:43:32,859 INFO L231 Difference]: Finished difference. Result has 345 places, 671 transitions, 14422 flow [2024-06-21 19:43:32,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14013, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14422, PETRI_PLACES=345, PETRI_TRANSITIONS=671} [2024-06-21 19:43:32,859 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 304 predicate places. [2024-06-21 19:43:32,860 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 671 transitions, 14422 flow [2024-06-21 19:43:32,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:32,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:43:32,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:43:32,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 19:43:32,860 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 19:43:32,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:43:32,860 INFO L85 PathProgramCache]: Analyzing trace with hash -2070341234, now seen corresponding path program 5 times [2024-06-21 19:43:32,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:43:32,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883505044] [2024-06-21 19:43:32,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:43:32,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:43:32,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:43:34,212 INFO 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 19:43:34,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:43:34,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883505044] [2024-06-21 19:43:34,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883505044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:43:34,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:43:34,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:43:34,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348012257] [2024-06-21 19:43:34,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:43:34,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:43:34,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:43:34,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:43:34,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:43:34,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:43:34,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 671 transitions, 14422 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:34,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:43:34,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:43:34,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:43:36,079 INFO L124 PetriNetUnfolderBase]: 4028/6078 cut-off events. [2024-06-21 19:43:36,079 INFO L125 PetriNetUnfolderBase]: For 550402/550410 co-relation queries the response was YES. [2024-06-21 19:43:36,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65657 conditions, 6078 events. 4028/6078 cut-off events. For 550402/550410 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 33671 event pairs, 703 based on Foata normal form. 12/6086 useless extension candidates. Maximal degree in co-relation 65502. Up to 5455 conditions per place. [2024-06-21 19:43:36,171 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 497 selfloop transitions, 199 changer transitions 0/699 dead transitions. [2024-06-21 19:43:36,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 699 transitions, 15953 flow [2024-06-21 19:43:36,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:43:36,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:43:36,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-21 19:43:36,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025 [2024-06-21 19:43:36,173 INFO L175 Difference]: Start difference. First operand has 345 places, 671 transitions, 14422 flow. Second operand 10 states and 161 transitions. [2024-06-21 19:43:36,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 699 transitions, 15953 flow [2024-06-21 19:43:37,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 699 transitions, 15462 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-21 19:43:38,000 INFO L231 Difference]: Finished difference. Result has 346 places, 671 transitions, 14337 flow [2024-06-21 19:43:38,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13931, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14337, PETRI_PLACES=346, PETRI_TRANSITIONS=671} [2024-06-21 19:43:38,001 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 305 predicate places. [2024-06-21 19:43:38,001 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 671 transitions, 14337 flow [2024-06-21 19:43:38,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:38,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:43:38,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:43:38,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 19:43:38,001 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 19:43:38,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:43:38,002 INFO L85 PathProgramCache]: Analyzing trace with hash -286159280, now seen corresponding path program 9 times [2024-06-21 19:43:38,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:43:38,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59659314] [2024-06-21 19:43:38,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:43:38,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:43:38,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:43:39,219 INFO 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 19:43:39,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:43:39,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59659314] [2024-06-21 19:43:39,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59659314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:43:39,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:43:39,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:43:39,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025312633] [2024-06-21 19:43:39,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:43:39,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:43:39,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:43:39,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:43:39,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:43:39,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:43:39,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 671 transitions, 14337 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:39,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:43:39,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:43:39,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:43:40,877 INFO L124 PetriNetUnfolderBase]: 4023/6071 cut-off events. [2024-06-21 19:43:40,877 INFO L125 PetriNetUnfolderBase]: For 555684/555692 co-relation queries the response was YES. [2024-06-21 19:43:40,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65513 conditions, 6071 events. 4023/6071 cut-off events. For 555684/555692 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 33589 event pairs, 703 based on Foata normal form. 10/6077 useless extension candidates. Maximal degree in co-relation 65357. Up to 5271 conditions per place. [2024-06-21 19:43:40,976 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 463 selfloop transitions, 227 changer transitions 0/693 dead transitions. [2024-06-21 19:43:40,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 693 transitions, 15803 flow [2024-06-21 19:43:40,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:43:40,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:43:40,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 19:43:40,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 19:43:40,978 INFO L175 Difference]: Start difference. First operand has 346 places, 671 transitions, 14337 flow. Second operand 8 states and 140 transitions. [2024-06-21 19:43:40,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 693 transitions, 15803 flow [2024-06-21 19:43:43,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 693 transitions, 15243 flow, removed 48 selfloop flow, removed 9 redundant places. [2024-06-21 19:43:43,109 INFO L231 Difference]: Finished difference. Result has 345 places, 671 transitions, 14241 flow [2024-06-21 19:43:43,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13777, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14241, PETRI_PLACES=345, PETRI_TRANSITIONS=671} [2024-06-21 19:43:43,109 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 304 predicate places. [2024-06-21 19:43:43,110 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 671 transitions, 14241 flow [2024-06-21 19:43:43,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:43,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:43:43,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:43:43,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 19:43:43,110 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 19:43:43,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:43:43,111 INFO L85 PathProgramCache]: Analyzing trace with hash 919066382, now seen corresponding path program 1 times [2024-06-21 19:43:43,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:43:43,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620026493] [2024-06-21 19:43:43,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:43:43,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:43:43,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:43:44,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:43:44,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:43:44,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620026493] [2024-06-21 19:43:44,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620026493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:43:44,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:43:44,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:43:44,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478951881] [2024-06-21 19:43:44,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:43:44,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:43:44,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:43:44,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:43:44,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:43:44,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:43:44,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 671 transitions, 14241 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:44,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:43:44,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:43:44,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:43:45,894 INFO L124 PetriNetUnfolderBase]: 4040/6105 cut-off events. [2024-06-21 19:43:45,894 INFO L125 PetriNetUnfolderBase]: For 575572/575578 co-relation queries the response was YES. [2024-06-21 19:43:45,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65673 conditions, 6105 events. 4040/6105 cut-off events. For 575572/575578 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 34310 event pairs, 980 based on Foata normal form. 10/6114 useless extension candidates. Maximal degree in co-relation 65517. Up to 5693 conditions per place. [2024-06-21 19:43:45,982 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 644 selfloop transitions, 79 changer transitions 0/726 dead transitions. [2024-06-21 19:43:45,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 726 transitions, 16123 flow [2024-06-21 19:43:45,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:43:45,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:43:45,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 19:43:45,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-21 19:43:45,983 INFO L175 Difference]: Start difference. First operand has 345 places, 671 transitions, 14241 flow. Second operand 9 states and 154 transitions. [2024-06-21 19:43:45,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 726 transitions, 16123 flow [2024-06-21 19:43:47,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 726 transitions, 15543 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 19:43:47,937 INFO L231 Difference]: Finished difference. Result has 349 places, 687 transitions, 14175 flow [2024-06-21 19:43:47,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13661, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14175, PETRI_PLACES=349, PETRI_TRANSITIONS=687} [2024-06-21 19:43:47,938 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 308 predicate places. [2024-06-21 19:43:47,938 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 687 transitions, 14175 flow [2024-06-21 19:43:47,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:47,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:43:47,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:43:47,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 19:43:47,938 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 19:43:47,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:43:47,939 INFO L85 PathProgramCache]: Analyzing trace with hash -963532182, now seen corresponding path program 2 times [2024-06-21 19:43:47,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:43:47,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394998528] [2024-06-21 19:43:47,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:43:47,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:43:47,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:43:48,854 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 19:43:48,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:43:48,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394998528] [2024-06-21 19:43:48,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394998528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:43:48,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:43:48,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:43:48,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880512201] [2024-06-21 19:43:48,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:43:48,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:43:48,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:43:48,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:43:48,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:43:48,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-21 19:43:48,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 687 transitions, 14175 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:48,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:43:48,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-21 19:43:48,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:43:50,317 INFO L124 PetriNetUnfolderBase]: 3450/5497 cut-off events. [2024-06-21 19:43:50,318 INFO L125 PetriNetUnfolderBase]: For 559580/559652 co-relation queries the response was YES. [2024-06-21 19:43:50,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60277 conditions, 5497 events. 3450/5497 cut-off events. For 559580/559652 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 33031 event pairs, 288 based on Foata normal form. 76/5536 useless extension candidates. Maximal degree in co-relation 60120. Up to 3817 conditions per place. [2024-06-21 19:43:50,400 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 403 selfloop transitions, 176 changer transitions 0/738 dead transitions. [2024-06-21 19:43:50,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 738 transitions, 15962 flow [2024-06-21 19:43:50,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:43:50,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:43:50,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 19:43:50,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2024-06-21 19:43:50,401 INFO L175 Difference]: Start difference. First operand has 349 places, 687 transitions, 14175 flow. Second operand 8 states and 156 transitions. [2024-06-21 19:43:50,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 738 transitions, 15962 flow [2024-06-21 19:43:52,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 738 transitions, 15677 flow, removed 134 selfloop flow, removed 2 redundant places. [2024-06-21 19:43:52,375 INFO L231 Difference]: Finished difference. Result has 358 places, 712 transitions, 15064 flow [2024-06-21 19:43:52,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14024, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15064, PETRI_PLACES=358, PETRI_TRANSITIONS=712} [2024-06-21 19:43:52,376 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 317 predicate places. [2024-06-21 19:43:52,376 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 712 transitions, 15064 flow [2024-06-21 19:43:52,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:52,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:43:52,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:43:52,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 19:43:52,377 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 19:43:52,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:43:52,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1369648596, now seen corresponding path program 3 times [2024-06-21 19:43:52,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:43:52,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145715959] [2024-06-21 19:43:52,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:43:52,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:43:52,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:43:53,690 INFO 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 19:43:53,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:43:53,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145715959] [2024-06-21 19:43:53,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145715959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:43:53,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:43:53,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:43:53,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281722772] [2024-06-21 19:43:53,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:43:53,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:43:53,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:43:53,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:43:53,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:43:53,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:43:53,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 712 transitions, 15064 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:53,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:43:53,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:43:53,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:43:55,610 INFO L124 PetriNetUnfolderBase]: 4108/6238 cut-off events. [2024-06-21 19:43:55,611 INFO L125 PetriNetUnfolderBase]: For 595979/595981 co-relation queries the response was YES. [2024-06-21 19:43:55,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67546 conditions, 6238 events. 4108/6238 cut-off events. For 595979/595981 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 35292 event pairs, 965 based on Foata normal form. 6/6243 useless extension candidates. Maximal degree in co-relation 67383. Up to 5813 conditions per place. [2024-06-21 19:43:55,707 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 612 selfloop transitions, 136 changer transitions 0/751 dead transitions. [2024-06-21 19:43:55,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 751 transitions, 16846 flow [2024-06-21 19:43:55,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:43:55,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:43:55,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-21 19:43:55,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.405 [2024-06-21 19:43:55,709 INFO L175 Difference]: Start difference. First operand has 358 places, 712 transitions, 15064 flow. Second operand 10 states and 162 transitions. [2024-06-21 19:43:55,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 751 transitions, 16846 flow [2024-06-21 19:43:57,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 751 transitions, 16745 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-06-21 19:43:57,930 INFO L231 Difference]: Finished difference. Result has 366 places, 716 transitions, 15418 flow [2024-06-21 19:43:57,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14983, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15418, PETRI_PLACES=366, PETRI_TRANSITIONS=716} [2024-06-21 19:43:57,931 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 325 predicate places. [2024-06-21 19:43:57,931 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 716 transitions, 15418 flow [2024-06-21 19:43:57,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:57,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:43:57,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:43:57,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 19:43:57,932 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 19:43:57,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:43:57,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1566686924, now seen corresponding path program 4 times [2024-06-21 19:43:57,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:43:57,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388966048] [2024-06-21 19:43:57,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:43:57,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:43:57,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:43:59,111 INFO 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 19:43:59,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:43:59,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388966048] [2024-06-21 19:43:59,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388966048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:43:59,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:43:59,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:43:59,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431710710] [2024-06-21 19:43:59,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:43:59,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:43:59,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:43:59,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:43:59,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:43:59,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:43:59,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 716 transitions, 15418 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:59,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:43:59,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:43:59,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:44:01,074 INFO L124 PetriNetUnfolderBase]: 4170/6320 cut-off events. [2024-06-21 19:44:01,074 INFO L125 PetriNetUnfolderBase]: For 610170/610172 co-relation queries the response was YES. [2024-06-21 19:44:01,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68748 conditions, 6320 events. 4170/6320 cut-off events. For 610170/610172 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 35795 event pairs, 911 based on Foata normal form. 6/6325 useless extension candidates. Maximal degree in co-relation 68583. Up to 5702 conditions per place. [2024-06-21 19:44:01,169 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 622 selfloop transitions, 138 changer transitions 0/763 dead transitions. [2024-06-21 19:44:01,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 763 transitions, 17355 flow [2024-06-21 19:44:01,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:44:01,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:44:01,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-21 19:44:01,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4075 [2024-06-21 19:44:01,171 INFO L175 Difference]: Start difference. First operand has 366 places, 716 transitions, 15418 flow. Second operand 10 states and 163 transitions. [2024-06-21 19:44:01,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 763 transitions, 17355 flow [2024-06-21 19:44:03,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 763 transitions, 17015 flow, removed 60 selfloop flow, removed 8 redundant places. [2024-06-21 19:44:03,028 INFO L231 Difference]: Finished difference. Result has 369 places, 727 transitions, 15712 flow [2024-06-21 19:44:03,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15078, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15712, PETRI_PLACES=369, PETRI_TRANSITIONS=727} [2024-06-21 19:44:03,028 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 328 predicate places. [2024-06-21 19:44:03,028 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 727 transitions, 15712 flow [2024-06-21 19:44:03,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:03,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:44:03,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:44:03,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 19:44:03,029 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:44:03,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:44:03,029 INFO L85 PathProgramCache]: Analyzing trace with hash -36209217, now seen corresponding path program 1 times [2024-06-21 19:44:03,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:44:03,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323331881] [2024-06-21 19:44:03,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:44:03,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:44:03,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:44:04,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:44:04,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:44:04,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323331881] [2024-06-21 19:44:04,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323331881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:44:04,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:44:04,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:44:04,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518176863] [2024-06-21 19:44:04,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:44:04,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:44:04,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:44:04,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:44:04,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:44:04,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:44:04,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 727 transitions, 15712 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:04,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:44:04,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:44:04,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:44:06,628 INFO L124 PetriNetUnfolderBase]: 4224/6394 cut-off events. [2024-06-21 19:44:06,629 INFO L125 PetriNetUnfolderBase]: For 629470/629478 co-relation queries the response was YES. [2024-06-21 19:44:06,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69775 conditions, 6394 events. 4224/6394 cut-off events. For 629470/629478 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 36058 event pairs, 711 based on Foata normal form. 11/6404 useless extension candidates. Maximal degree in co-relation 69608. Up to 6084 conditions per place. [2024-06-21 19:44:06,729 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 661 selfloop transitions, 114 changer transitions 0/778 dead transitions. [2024-06-21 19:44:06,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 778 transitions, 17723 flow [2024-06-21 19:44:06,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:44:06,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:44:06,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-21 19:44:06,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.405 [2024-06-21 19:44:06,732 INFO L175 Difference]: Start difference. First operand has 369 places, 727 transitions, 15712 flow. Second operand 10 states and 162 transitions. [2024-06-21 19:44:06,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 778 transitions, 17723 flow [2024-06-21 19:44:08,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 778 transitions, 17379 flow, removed 101 selfloop flow, removed 6 redundant places. [2024-06-21 19:44:08,935 INFO L231 Difference]: Finished difference. Result has 373 places, 743 transitions, 15981 flow [2024-06-21 19:44:08,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15368, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=727, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15981, PETRI_PLACES=373, PETRI_TRANSITIONS=743} [2024-06-21 19:44:08,937 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 332 predicate places. [2024-06-21 19:44:08,937 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 743 transitions, 15981 flow [2024-06-21 19:44:08,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:08,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:44:08,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:44:08,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 19:44:08,938 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:44:08,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:44:08,938 INFO L85 PathProgramCache]: Analyzing trace with hash -843629384, now seen corresponding path program 5 times [2024-06-21 19:44:08,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:44:08,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972674248] [2024-06-21 19:44:08,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:44:08,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:44:08,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:44:10,108 INFO 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 19:44:10,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:44:10,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972674248] [2024-06-21 19:44:10,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972674248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:44:10,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:44:10,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:44:10,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440131220] [2024-06-21 19:44:10,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:44:10,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:44:10,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:44:10,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:44:10,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:44:10,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:44:10,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 743 transitions, 15981 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:10,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:44:10,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:44:10,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:44:12,073 INFO L124 PetriNetUnfolderBase]: 4274/6460 cut-off events. [2024-06-21 19:44:12,074 INFO L125 PetriNetUnfolderBase]: For 640161/640167 co-relation queries the response was YES. [2024-06-21 19:44:12,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70455 conditions, 6460 events. 4274/6460 cut-off events. For 640161/640167 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 36460 event pairs, 624 based on Foata normal form. 10/6469 useless extension candidates. Maximal degree in co-relation 70286. Up to 6095 conditions per place. [2024-06-21 19:44:12,171 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 706 selfloop transitions, 88 changer transitions 0/797 dead transitions. [2024-06-21 19:44:12,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 797 transitions, 18056 flow [2024-06-21 19:44:12,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:44:12,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:44:12,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-21 19:44:12,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.405 [2024-06-21 19:44:12,173 INFO L175 Difference]: Start difference. First operand has 373 places, 743 transitions, 15981 flow. Second operand 10 states and 162 transitions. [2024-06-21 19:44:12,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 797 transitions, 18056 flow [2024-06-21 19:44:14,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 797 transitions, 17816 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-21 19:44:14,652 INFO L231 Difference]: Finished difference. Result has 380 places, 761 transitions, 16349 flow [2024-06-21 19:44:14,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15741, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=743, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=656, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16349, PETRI_PLACES=380, PETRI_TRANSITIONS=761} [2024-06-21 19:44:14,653 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 339 predicate places. [2024-06-21 19:44:14,653 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 761 transitions, 16349 flow [2024-06-21 19:44:14,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:14,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:44:14,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:44:14,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 19:44:14,654 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:44:14,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:44:14,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1858985314, now seen corresponding path program 6 times [2024-06-21 19:44:14,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:44:14,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669508001] [2024-06-21 19:44:14,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:44:14,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:44:14,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:44:15,997 INFO 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 19:44:15,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:44:15,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669508001] [2024-06-21 19:44:15,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669508001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:44:15,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:44:15,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:44:15,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065662980] [2024-06-21 19:44:15,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:44:15,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:44:15,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:44:15,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:44:15,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:44:16,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:44:16,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 761 transitions, 16349 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:16,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:44:16,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:44:16,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:44:18,017 INFO L124 PetriNetUnfolderBase]: 4330/6555 cut-off events. [2024-06-21 19:44:18,018 INFO L125 PetriNetUnfolderBase]: For 662167/662173 co-relation queries the response was YES. [2024-06-21 19:44:18,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71871 conditions, 6555 events. 4330/6555 cut-off events. For 662167/662173 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 37095 event pairs, 694 based on Foata normal form. 10/6564 useless extension candidates. Maximal degree in co-relation 71699. Up to 6185 conditions per place. [2024-06-21 19:44:18,117 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 675 selfloop transitions, 124 changer transitions 0/802 dead transitions. [2024-06-21 19:44:18,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 802 transitions, 18267 flow [2024-06-21 19:44:18,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:44:18,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:44:18,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-21 19:44:18,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4075 [2024-06-21 19:44:18,118 INFO L175 Difference]: Start difference. First operand has 380 places, 761 transitions, 16349 flow. Second operand 10 states and 163 transitions. [2024-06-21 19:44:18,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 802 transitions, 18267 flow [2024-06-21 19:44:20,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 802 transitions, 17994 flow, removed 110 selfloop flow, removed 4 redundant places. [2024-06-21 19:44:20,954 INFO L231 Difference]: Finished difference. Result has 386 places, 769 transitions, 16561 flow [2024-06-21 19:44:20,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=16076, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=761, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=637, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16561, PETRI_PLACES=386, PETRI_TRANSITIONS=769} [2024-06-21 19:44:20,955 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 345 predicate places. [2024-06-21 19:44:20,955 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 769 transitions, 16561 flow [2024-06-21 19:44:20,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:20,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:44:20,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:44:20,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 19:44:20,956 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:44:20,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:44:20,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1858989034, now seen corresponding path program 7 times [2024-06-21 19:44:20,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:44:20,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211207101] [2024-06-21 19:44:20,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:44:20,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:44:20,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:44:22,102 INFO 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 19:44:22,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:44:22,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211207101] [2024-06-21 19:44:22,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211207101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:44:22,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:44:22,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:44:22,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410977052] [2024-06-21 19:44:22,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:44:22,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:44:22,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:44:22,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:44:22,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:44:22,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:44:22,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 769 transitions, 16561 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:22,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:44:22,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:44:22,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:44:24,443 INFO L124 PetriNetUnfolderBase]: 4386/6637 cut-off events. [2024-06-21 19:44:24,443 INFO L125 PetriNetUnfolderBase]: For 679176/679182 co-relation queries the response was YES. [2024-06-21 19:44:24,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72883 conditions, 6637 events. 4386/6637 cut-off events. For 679176/679182 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 37614 event pairs, 673 based on Foata normal form. 10/6646 useless extension candidates. Maximal degree in co-relation 72709. Up to 6097 conditions per place. [2024-06-21 19:44:24,533 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 681 selfloop transitions, 133 changer transitions 0/817 dead transitions. [2024-06-21 19:44:24,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 817 transitions, 18625 flow [2024-06-21 19:44:24,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:44:24,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:44:24,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-21 19:44:24,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41 [2024-06-21 19:44:24,535 INFO L175 Difference]: Start difference. First operand has 386 places, 769 transitions, 16561 flow. Second operand 10 states and 164 transitions. [2024-06-21 19:44:24,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 817 transitions, 18625 flow [2024-06-21 19:44:26,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 817 transitions, 18320 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-21 19:44:26,877 INFO L231 Difference]: Finished difference. Result has 391 places, 783 transitions, 16916 flow [2024-06-21 19:44:26,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=16256, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=769, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=637, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16916, PETRI_PLACES=391, PETRI_TRANSITIONS=783} [2024-06-21 19:44:26,878 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 350 predicate places. [2024-06-21 19:44:26,878 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 783 transitions, 16916 flow [2024-06-21 19:44:26,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:26,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:44:26,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:44:26,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 19:44:26,879 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:44:26,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:44:26,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1772149199, now seen corresponding path program 2 times [2024-06-21 19:44:26,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:44:26,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080357586] [2024-06-21 19:44:26,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:44:26,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:44:26,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:44:28,483 INFO 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 19:44:28,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:44:28,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080357586] [2024-06-21 19:44:28,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080357586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:44:28,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:44:28,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:44:28,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631727193] [2024-06-21 19:44:28,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:44:28,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:44:28,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:44:28,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:44:28,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:44:28,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:44:28,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 783 transitions, 16916 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:28,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:44:28,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:44:28,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:44:30,751 INFO L124 PetriNetUnfolderBase]: 4461/6745 cut-off events. [2024-06-21 19:44:30,751 INFO L125 PetriNetUnfolderBase]: For 694477/694487 co-relation queries the response was YES. [2024-06-21 19:44:30,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74144 conditions, 6745 events. 4461/6745 cut-off events. For 694477/694487 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 38332 event pairs, 678 based on Foata normal form. 13/6757 useless extension candidates. Maximal degree in co-relation 73968. Up to 6437 conditions per place. [2024-06-21 19:44:30,858 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 718 selfloop transitions, 119 changer transitions 0/840 dead transitions. [2024-06-21 19:44:30,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 840 transitions, 19195 flow [2024-06-21 19:44:30,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:44:30,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:44:30,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-21 19:44:30,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4075 [2024-06-21 19:44:30,859 INFO L175 Difference]: Start difference. First operand has 391 places, 783 transitions, 16916 flow. Second operand 10 states and 163 transitions. [2024-06-21 19:44:30,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 840 transitions, 19195 flow [2024-06-21 19:44:33,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 840 transitions, 18881 flow, removed 103 selfloop flow, removed 5 redundant places. [2024-06-21 19:44:33,851 INFO L231 Difference]: Finished difference. Result has 396 places, 807 transitions, 17403 flow [2024-06-21 19:44:33,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=16602, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=783, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=664, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17403, PETRI_PLACES=396, PETRI_TRANSITIONS=807} [2024-06-21 19:44:33,851 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 355 predicate places. [2024-06-21 19:44:33,851 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 807 transitions, 17403 flow [2024-06-21 19:44:33,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:33,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:44:33,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:44:33,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 19:44:33,852 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:44:33,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:44:33,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1807454498, now seen corresponding path program 1 times [2024-06-21 19:44:33,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:44:33,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580813537] [2024-06-21 19:44:33,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:44:33,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:44:33,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:44:35,396 INFO 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 19:44:35,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:44:35,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580813537] [2024-06-21 19:44:35,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580813537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:44:35,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:44:35,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:44:35,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84788568] [2024-06-21 19:44:35,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:44:35,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:44:35,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:44:35,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:44:35,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:44:35,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:44:35,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 807 transitions, 17403 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:35,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:44:35,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:44:35,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:44:37,766 INFO L124 PetriNetUnfolderBase]: 4668/7085 cut-off events. [2024-06-21 19:44:37,766 INFO L125 PetriNetUnfolderBase]: For 811352/811360 co-relation queries the response was YES. [2024-06-21 19:44:37,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79005 conditions, 7085 events. 4668/7085 cut-off events. For 811352/811360 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 40708 event pairs, 705 based on Foata normal form. 24/7108 useless extension candidates. Maximal degree in co-relation 78827. Up to 5886 conditions per place. [2024-06-21 19:44:37,885 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 638 selfloop transitions, 218 changer transitions 0/859 dead transitions. [2024-06-21 19:44:37,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 859 transitions, 19876 flow [2024-06-21 19:44:37,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:44:37,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:44:37,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-21 19:44:37,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 19:44:37,887 INFO L175 Difference]: Start difference. First operand has 396 places, 807 transitions, 17403 flow. Second operand 11 states and 187 transitions. [2024-06-21 19:44:37,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 859 transitions, 19876 flow [2024-06-21 19:44:40,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 859 transitions, 19622 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-21 19:44:40,985 INFO L231 Difference]: Finished difference. Result has 402 places, 810 transitions, 17758 flow [2024-06-21 19:44:40,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=17149, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=807, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=17758, PETRI_PLACES=402, PETRI_TRANSITIONS=810} [2024-06-21 19:44:40,985 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 361 predicate places. [2024-06-21 19:44:40,985 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 810 transitions, 17758 flow [2024-06-21 19:44:40,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:40,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:44:40,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:44:40,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 19:44:40,986 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:44:40,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:44:40,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1807447058, now seen corresponding path program 2 times [2024-06-21 19:44:40,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:44:40,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057598287] [2024-06-21 19:44:40,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:44:40,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:44:40,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:44:42,583 INFO 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 19:44:42,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:44:42,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057598287] [2024-06-21 19:44:42,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057598287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:44:42,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:44:42,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:44:42,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773557338] [2024-06-21 19:44:42,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:44:42,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:44:42,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:44:42,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:44:42,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:44:42,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:44:42,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 810 transitions, 17758 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:42,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:44:42,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:44:42,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:44:45,170 INFO L124 PetriNetUnfolderBase]: 4660/7073 cut-off events. [2024-06-21 19:44:45,171 INFO L125 PetriNetUnfolderBase]: For 790774/790782 co-relation queries the response was YES. [2024-06-21 19:44:45,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79344 conditions, 7073 events. 4660/7073 cut-off events. For 790774/790782 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 40720 event pairs, 734 based on Foata normal form. 12/7084 useless extension candidates. Maximal degree in co-relation 79164. Up to 6461 conditions per place. [2024-06-21 19:44:45,270 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 631 selfloop transitions, 219 changer transitions 0/853 dead transitions. [2024-06-21 19:44:45,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 853 transitions, 19753 flow [2024-06-21 19:44:45,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:44:45,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:44:45,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-21 19:44:45,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4068181818181818 [2024-06-21 19:44:45,272 INFO L175 Difference]: Start difference. First operand has 402 places, 810 transitions, 17758 flow. Second operand 11 states and 179 transitions. [2024-06-21 19:44:45,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 853 transitions, 19753 flow [2024-06-21 19:44:48,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 853 transitions, 19422 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-21 19:44:48,115 INFO L231 Difference]: Finished difference. Result has 407 places, 816 transitions, 18044 flow [2024-06-21 19:44:48,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=17441, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=810, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=18044, PETRI_PLACES=407, PETRI_TRANSITIONS=816} [2024-06-21 19:44:48,116 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 366 predicate places. [2024-06-21 19:44:48,116 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 816 transitions, 18044 flow [2024-06-21 19:44:48,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:48,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:44:48,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:44:48,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 19:44:48,117 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:44:48,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:44:48,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1807239451, now seen corresponding path program 3 times [2024-06-21 19:44:48,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:44:48,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837446607] [2024-06-21 19:44:48,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:44:48,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:44:48,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:44:49,596 INFO 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 19:44:49,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:44:49,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837446607] [2024-06-21 19:44:49,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837446607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:44:49,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:44:49,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:44:49,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439441038] [2024-06-21 19:44:49,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:44:49,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:44:49,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:44:49,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:44:49,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:44:49,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:44:49,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 816 transitions, 18044 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:49,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:44:49,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:44:49,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:44:51,888 INFO L124 PetriNetUnfolderBase]: 4678/7099 cut-off events. [2024-06-21 19:44:51,889 INFO L125 PetriNetUnfolderBase]: For 800058/800066 co-relation queries the response was YES. [2024-06-21 19:44:51,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80160 conditions, 7099 events. 4678/7099 cut-off events. For 800058/800066 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 40919 event pairs, 729 based on Foata normal form. 11/7109 useless extension candidates. Maximal degree in co-relation 79977. Up to 6355 conditions per place. [2024-06-21 19:44:52,008 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 592 selfloop transitions, 255 changer transitions 0/850 dead transitions. [2024-06-21 19:44:52,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 850 transitions, 20030 flow [2024-06-21 19:44:52,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:44:52,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:44:52,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 19:44:52,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-21 19:44:52,009 INFO L175 Difference]: Start difference. First operand has 407 places, 816 transitions, 18044 flow. Second operand 9 states and 151 transitions. [2024-06-21 19:44:52,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 850 transitions, 20030 flow [2024-06-21 19:44:55,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 850 transitions, 19709 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-21 19:44:55,434 INFO L231 Difference]: Finished difference. Result has 410 places, 822 transitions, 18524 flow [2024-06-21 19:44:55,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=17723, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=816, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18524, PETRI_PLACES=410, PETRI_TRANSITIONS=822} [2024-06-21 19:44:55,435 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 369 predicate places. [2024-06-21 19:44:55,436 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 822 transitions, 18524 flow [2024-06-21 19:44:55,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:55,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:44:55,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:44:55,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 19:44:55,437 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:44:55,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:44:55,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1095956941, now seen corresponding path program 1 times [2024-06-21 19:44:55,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:44:55,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174649764] [2024-06-21 19:44:55,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:44:55,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:44:55,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:44:56,626 INFO 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 19:44:56,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:44:56,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174649764] [2024-06-21 19:44:56,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174649764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:44:56,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:44:56,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:44:56,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252946209] [2024-06-21 19:44:56,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:44:56,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:44:56,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:44:56,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:44:56,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:44:56,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:44:56,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 822 transitions, 18524 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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 19:44:56,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:44:56,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:44:56,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:44:58,931 INFO L124 PetriNetUnfolderBase]: 4688/7119 cut-off events. [2024-06-21 19:44:58,931 INFO L125 PetriNetUnfolderBase]: For 814560/814562 co-relation queries the response was YES. [2024-06-21 19:44:59,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81489 conditions, 7119 events. 4688/7119 cut-off events. For 814560/814562 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 41206 event pairs, 1313 based on Foata normal form. 4/7122 useless extension candidates. Maximal degree in co-relation 81304. Up to 7031 conditions per place. [2024-06-21 19:44:59,062 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 811 selfloop transitions, 30 changer transitions 0/844 dead transitions. [2024-06-21 19:44:59,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 844 transitions, 20316 flow [2024-06-21 19:44:59,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:44:59,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:44:59,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 19:44:59,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-21 19:44:59,063 INFO L175 Difference]: Start difference. First operand has 410 places, 822 transitions, 18524 flow. Second operand 7 states and 116 transitions. [2024-06-21 19:44:59,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 844 transitions, 20316 flow [2024-06-21 19:45:02,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 844 transitions, 19793 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-21 19:45:02,079 INFO L231 Difference]: Finished difference. Result has 410 places, 825 transitions, 18120 flow [2024-06-21 19:45:02,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=18001, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=822, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=792, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=18120, PETRI_PLACES=410, PETRI_TRANSITIONS=825} [2024-06-21 19:45:02,080 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 369 predicate places. [2024-06-21 19:45:02,080 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 825 transitions, 18120 flow [2024-06-21 19:45:02,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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 19:45:02,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:02,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:45:02,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 19:45:02,080 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:45:02,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:02,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1315805898, now seen corresponding path program 8 times [2024-06-21 19:45:02,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:02,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836296730] [2024-06-21 19:45:02,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:02,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:02,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:45:03,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:45:03,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:45:03,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836296730] [2024-06-21 19:45:03,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836296730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:45:03,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:45:03,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:45:03,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418767694] [2024-06-21 19:45:03,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:45:03,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:45:03,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:45:03,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:45:03,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:45:03,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:45:03,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 825 transitions, 18120 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:03,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:45:03,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:45:03,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:45:05,876 INFO L124 PetriNetUnfolderBase]: 4749/7210 cut-off events. [2024-06-21 19:45:05,876 INFO L125 PetriNetUnfolderBase]: For 838901/838909 co-relation queries the response was YES. [2024-06-21 19:45:05,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82009 conditions, 7210 events. 4749/7210 cut-off events. For 838901/838909 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 41853 event pairs, 759 based on Foata normal form. 12/7218 useless extension candidates. Maximal degree in co-relation 81824. Up to 6836 conditions per place. [2024-06-21 19:45:06,018 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 783 selfloop transitions, 89 changer transitions 0/875 dead transitions. [2024-06-21 19:45:06,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 875 transitions, 20397 flow [2024-06-21 19:45:06,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:45:06,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:45:06,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-21 19:45:06,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-21 19:45:06,020 INFO L175 Difference]: Start difference. First operand has 410 places, 825 transitions, 18120 flow. Second operand 10 states and 155 transitions. [2024-06-21 19:45:06,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 875 transitions, 20397 flow [2024-06-21 19:45:09,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 875 transitions, 20293 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 19:45:09,903 INFO L231 Difference]: Finished difference. Result has 417 places, 845 transitions, 18702 flow [2024-06-21 19:45:09,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=18016, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=825, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=737, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18702, PETRI_PLACES=417, PETRI_TRANSITIONS=845} [2024-06-21 19:45:09,904 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 376 predicate places. [2024-06-21 19:45:09,904 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 845 transitions, 18702 flow [2024-06-21 19:45:09,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:09,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:09,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:45:09,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 19:45:09,905 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:45:09,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:09,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1832805870, now seen corresponding path program 9 times [2024-06-21 19:45:09,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:09,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595373612] [2024-06-21 19:45:09,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:09,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:09,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:45:11,238 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 19:45:11,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:45:11,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595373612] [2024-06-21 19:45:11,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595373612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:45:11,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:45:11,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:45:11,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403197037] [2024-06-21 19:45:11,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:45:11,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:45:11,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:45:11,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:45:11,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:45:11,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:45:11,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 845 transitions, 18702 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:11,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:45:11,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:45:11,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:45:13,959 INFO L124 PetriNetUnfolderBase]: 4810/7315 cut-off events. [2024-06-21 19:45:13,959 INFO L125 PetriNetUnfolderBase]: For 863213/863219 co-relation queries the response was YES. [2024-06-21 19:45:14,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83618 conditions, 7315 events. 4810/7315 cut-off events. For 863213/863219 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 42576 event pairs, 826 based on Foata normal form. 10/7321 useless extension candidates. Maximal degree in co-relation 83430. Up to 6939 conditions per place. [2024-06-21 19:45:14,097 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 756 selfloop transitions, 123 changer transitions 0/882 dead transitions. [2024-06-21 19:45:14,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 882 transitions, 20760 flow [2024-06-21 19:45:14,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:45:14,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:45:14,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-21 19:45:14,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39 [2024-06-21 19:45:14,099 INFO L175 Difference]: Start difference. First operand has 417 places, 845 transitions, 18702 flow. Second operand 10 states and 156 transitions. [2024-06-21 19:45:14,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 882 transitions, 20760 flow [2024-06-21 19:45:17,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 882 transitions, 20459 flow, removed 127 selfloop flow, removed 4 redundant places. [2024-06-21 19:45:17,765 INFO L231 Difference]: Finished difference. Result has 423 places, 855 transitions, 18892 flow [2024-06-21 19:45:17,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=18401, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=845, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=722, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18892, PETRI_PLACES=423, PETRI_TRANSITIONS=855} [2024-06-21 19:45:17,766 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 382 predicate places. [2024-06-21 19:45:17,766 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 855 transitions, 18892 flow [2024-06-21 19:45:17,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:17,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:17,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:45:17,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 19:45:17,767 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:45:17,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:17,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1832809590, now seen corresponding path program 10 times [2024-06-21 19:45:17,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:17,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006676544] [2024-06-21 19:45:17,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:17,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:17,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:45:19,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:45:19,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:45:19,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006676544] [2024-06-21 19:45:19,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006676544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:45:19,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:45:19,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:45:19,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494017293] [2024-06-21 19:45:19,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:45:19,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:45:19,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:45:19,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:45:19,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:45:19,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:45:19,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 855 transitions, 18892 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:19,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:45:19,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:45:19,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:45:21,649 INFO L124 PetriNetUnfolderBase]: 4871/7404 cut-off events. [2024-06-21 19:45:21,649 INFO L125 PetriNetUnfolderBase]: For 881101/881107 co-relation queries the response was YES. [2024-06-21 19:45:21,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84584 conditions, 7404 events. 4871/7404 cut-off events. For 881101/881107 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 43225 event pairs, 800 based on Foata normal form. 10/7410 useless extension candidates. Maximal degree in co-relation 84394. Up to 6880 conditions per place. [2024-06-21 19:45:21,776 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 762 selfloop transitions, 134 changer transitions 0/899 dead transitions. [2024-06-21 19:45:21,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 899 transitions, 21088 flow [2024-06-21 19:45:21,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:45:21,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:45:21,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-21 19:45:21,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3925 [2024-06-21 19:45:21,778 INFO L175 Difference]: Start difference. First operand has 423 places, 855 transitions, 18892 flow. Second operand 10 states and 157 transitions. [2024-06-21 19:45:21,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 899 transitions, 21088 flow [2024-06-21 19:45:25,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 899 transitions, 20787 flow, removed 45 selfloop flow, removed 8 redundant places. [2024-06-21 19:45:25,883 INFO L231 Difference]: Finished difference. Result has 426 places, 871 transitions, 19250 flow [2024-06-21 19:45:25,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=18591, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=855, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=722, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19250, PETRI_PLACES=426, PETRI_TRANSITIONS=871} [2024-06-21 19:45:25,883 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 385 predicate places. [2024-06-21 19:45:25,883 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 871 transitions, 19250 flow [2024-06-21 19:45:25,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:25,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:25,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:45:25,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 19:45:25,884 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:45:25,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:25,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1746113905, now seen corresponding path program 4 times [2024-06-21 19:45:25,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:25,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086850634] [2024-06-21 19:45:25,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:25,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:45:27,211 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 19:45:27,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:45:27,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086850634] [2024-06-21 19:45:27,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086850634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:45:27,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:45:27,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:45:27,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149300777] [2024-06-21 19:45:27,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:45:27,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:45:27,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:45:27,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:45:27,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:45:27,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:45:27,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 871 transitions, 19250 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:27,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:45:27,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:45:27,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:45:29,631 INFO L124 PetriNetUnfolderBase]: 4866/7390 cut-off events. [2024-06-21 19:45:29,631 INFO L125 PetriNetUnfolderBase]: For 886355/886361 co-relation queries the response was YES. [2024-06-21 19:45:29,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84775 conditions, 7390 events. 4866/7390 cut-off events. For 886355/886361 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 42964 event pairs, 767 based on Foata normal form. 8/7394 useless extension candidates. Maximal degree in co-relation 84583. Up to 6865 conditions per place. [2024-06-21 19:45:29,771 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 717 selfloop transitions, 175 changer transitions 0/895 dead transitions. [2024-06-21 19:45:29,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 895 transitions, 21131 flow [2024-06-21 19:45:29,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:45:29,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:45:29,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 19:45:29,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-21 19:45:29,773 INFO L175 Difference]: Start difference. First operand has 426 places, 871 transitions, 19250 flow. Second operand 8 states and 139 transitions. [2024-06-21 19:45:29,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 895 transitions, 21131 flow [2024-06-21 19:45:33,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 895 transitions, 20867 flow, removed 73 selfloop flow, removed 6 redundant places. [2024-06-21 19:45:34,004 INFO L231 Difference]: Finished difference. Result has 428 places, 873 transitions, 19405 flow [2024-06-21 19:45:34,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=18986, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=871, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=696, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=19405, PETRI_PLACES=428, PETRI_TRANSITIONS=873} [2024-06-21 19:45:34,005 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 387 predicate places. [2024-06-21 19:45:34,005 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 873 transitions, 19405 flow [2024-06-21 19:45:34,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:34,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:34,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:45:34,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 19:45:34,005 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:45:34,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:34,006 INFO L85 PathProgramCache]: Analyzing trace with hash 571022510, now seen corresponding path program 11 times [2024-06-21 19:45:34,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:34,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978289650] [2024-06-21 19:45:34,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:34,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:34,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:45:35,441 INFO 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 19:45:35,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:45:35,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978289650] [2024-06-21 19:45:35,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978289650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:45:35,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:45:35,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:45:35,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809257629] [2024-06-21 19:45:35,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:45:35,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:45:35,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:45:35,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:45:35,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:45:35,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:45:35,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 873 transitions, 19405 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:35,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:45:35,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:45:35,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:45:38,086 INFO L124 PetriNetUnfolderBase]: 4894/7434 cut-off events. [2024-06-21 19:45:38,087 INFO L125 PetriNetUnfolderBase]: For 912913/912919 co-relation queries the response was YES. [2024-06-21 19:45:38,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85929 conditions, 7434 events. 4894/7434 cut-off events. For 912913/912919 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 43333 event pairs, 777 based on Foata normal form. 10/7440 useless extension candidates. Maximal degree in co-relation 85735. Up to 6989 conditions per place. [2024-06-21 19:45:38,229 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 756 selfloop transitions, 145 changer transitions 0/904 dead transitions. [2024-06-21 19:45:38,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 904 transitions, 21509 flow [2024-06-21 19:45:38,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:45:38,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:45:38,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 19:45:38,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 19:45:38,230 INFO L175 Difference]: Start difference. First operand has 428 places, 873 transitions, 19405 flow. Second operand 9 states and 153 transitions. [2024-06-21 19:45:38,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 904 transitions, 21509 flow [2024-06-21 19:45:42,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 904 transitions, 21173 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 19:45:42,532 INFO L231 Difference]: Finished difference. Result has 431 places, 877 transitions, 19579 flow [2024-06-21 19:45:42,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=19069, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=873, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=728, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=19579, PETRI_PLACES=431, PETRI_TRANSITIONS=877} [2024-06-21 19:45:42,533 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 390 predicate places. [2024-06-21 19:45:42,533 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 877 transitions, 19579 flow [2024-06-21 19:45:42,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:42,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:42,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:45:42,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 19:45:42,533 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:45:42,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:42,534 INFO L85 PathProgramCache]: Analyzing trace with hash 571018790, now seen corresponding path program 12 times [2024-06-21 19:45:42,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:42,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893699551] [2024-06-21 19:45:42,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:42,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:42,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:45:43,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:45:43,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:45:43,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893699551] [2024-06-21 19:45:43,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893699551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:45:43,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:45:43,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:45:43,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780857501] [2024-06-21 19:45:43,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:45:43,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:45:43,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:45:43,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:45:43,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:45:44,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:45:44,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 877 transitions, 19579 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:44,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:45:44,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:45:44,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:45:46,442 INFO L124 PetriNetUnfolderBase]: 4958/7534 cut-off events. [2024-06-21 19:45:46,442 INFO L125 PetriNetUnfolderBase]: For 963164/963170 co-relation queries the response was YES. [2024-06-21 19:45:46,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88211 conditions, 7534 events. 4958/7534 cut-off events. For 963164/963170 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 44025 event pairs, 770 based on Foata normal form. 10/7540 useless extension candidates. Maximal degree in co-relation 88016. Up to 6991 conditions per place. [2024-06-21 19:45:46,583 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 762 selfloop transitions, 152 changer transitions 0/917 dead transitions. [2024-06-21 19:45:46,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 917 transitions, 22304 flow [2024-06-21 19:45:46,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:45:46,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:45:46,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 19:45:46,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-21 19:45:46,584 INFO L175 Difference]: Start difference. First operand has 431 places, 877 transitions, 19579 flow. Second operand 9 states and 155 transitions. [2024-06-21 19:45:46,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 917 transitions, 22304 flow [2024-06-21 19:45:50,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 917 transitions, 21822 flow, removed 99 selfloop flow, removed 7 redundant places. [2024-06-21 19:45:50,867 INFO L231 Difference]: Finished difference. Result has 434 places, 887 transitions, 19897 flow [2024-06-21 19:45:50,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=19105, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=877, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=729, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=19897, PETRI_PLACES=434, PETRI_TRANSITIONS=887} [2024-06-21 19:45:50,867 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 393 predicate places. [2024-06-21 19:45:50,867 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 887 transitions, 19897 flow [2024-06-21 19:45:50,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:50,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:50,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:45:50,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 19:45:50,868 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:45:50,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:50,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1259041496, now seen corresponding path program 13 times [2024-06-21 19:45:50,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:50,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751276331] [2024-06-21 19:45:50,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:50,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:50,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:45:52,291 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 19:45:52,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:45:52,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751276331] [2024-06-21 19:45:52,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751276331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:45:52,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:45:52,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:45:52,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646872307] [2024-06-21 19:45:52,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:45:52,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:45:52,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:45:52,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:45:52,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:45:52,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:45:52,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 887 transitions, 19897 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:52,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:45:52,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:45:52,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:45:55,126 INFO L124 PetriNetUnfolderBase]: 4950/7522 cut-off events. [2024-06-21 19:45:55,126 INFO L125 PetriNetUnfolderBase]: For 959000/959006 co-relation queries the response was YES. [2024-06-21 19:45:55,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87347 conditions, 7522 events. 4950/7522 cut-off events. For 959000/959006 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 43983 event pairs, 780 based on Foata normal form. 10/7528 useless extension candidates. Maximal degree in co-relation 87150. Up to 7077 conditions per place. [2024-06-21 19:45:55,258 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 757 selfloop transitions, 155 changer transitions 0/915 dead transitions. [2024-06-21 19:45:55,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 915 transitions, 21890 flow [2024-06-21 19:45:55,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:45:55,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:45:55,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-21 19:45:55,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3975 [2024-06-21 19:45:55,259 INFO L175 Difference]: Start difference. First operand has 434 places, 887 transitions, 19897 flow. Second operand 10 states and 159 transitions. [2024-06-21 19:45:55,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 915 transitions, 21890 flow [2024-06-21 19:45:59,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 915 transitions, 21280 flow, removed 227 selfloop flow, removed 5 redundant places. [2024-06-21 19:45:59,803 INFO L231 Difference]: Finished difference. Result has 439 places, 888 transitions, 19678 flow [2024-06-21 19:45:59,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=19347, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=887, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=732, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19678, PETRI_PLACES=439, PETRI_TRANSITIONS=888} [2024-06-21 19:45:59,803 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 398 predicate places. [2024-06-21 19:45:59,803 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 888 transitions, 19678 flow [2024-06-21 19:45:59,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:59,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:59,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:45:59,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 19:45:59,804 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:45:59,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:59,804 INFO L85 PathProgramCache]: Analyzing trace with hash 576736802, now seen corresponding path program 3 times [2024-06-21 19:45:59,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:59,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728014965] [2024-06-21 19:45:59,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:59,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:59,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:01,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:01,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:01,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728014965] [2024-06-21 19:46:01,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728014965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:01,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:01,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:46:01,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726938776] [2024-06-21 19:46:01,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:01,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:46:01,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:01,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:46:01,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:46:01,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:46:01,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 888 transitions, 19678 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:01,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:01,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:46:01,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:04,064 INFO L124 PetriNetUnfolderBase]: 5069/7719 cut-off events. [2024-06-21 19:46:04,064 INFO L125 PetriNetUnfolderBase]: For 1054198/1054204 co-relation queries the response was YES. [2024-06-21 19:46:04,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88551 conditions, 7719 events. 5069/7719 cut-off events. For 1054198/1054204 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 45438 event pairs, 806 based on Foata normal form. 36/7751 useless extension candidates. Maximal degree in co-relation 88352. Up to 7090 conditions per place. [2024-06-21 19:46:04,198 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 762 selfloop transitions, 162 changer transitions 0/927 dead transitions. [2024-06-21 19:46:04,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 927 transitions, 21854 flow [2024-06-21 19:46:04,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:46:04,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:46:04,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2024-06-21 19:46:04,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-21 19:46:04,200 INFO L175 Difference]: Start difference. First operand has 439 places, 888 transitions, 19678 flow. Second operand 11 states and 180 transitions. [2024-06-21 19:46:04,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 927 transitions, 21854 flow [2024-06-21 19:46:08,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 927 transitions, 21538 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 19:46:08,742 INFO L231 Difference]: Finished difference. Result has 444 places, 891 transitions, 19840 flow [2024-06-21 19:46:08,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=19362, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=888, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=726, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=19840, PETRI_PLACES=444, PETRI_TRANSITIONS=891} [2024-06-21 19:46:08,743 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 403 predicate places. [2024-06-21 19:46:08,743 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 891 transitions, 19840 flow [2024-06-21 19:46:08,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:08,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:08,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:46:08,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 19:46:08,743 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:46:08,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:08,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1259256698, now seen corresponding path program 4 times [2024-06-21 19:46:08,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:08,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162984204] [2024-06-21 19:46:08,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:08,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:08,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:10,610 INFO 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 19:46:10,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:10,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162984204] [2024-06-21 19:46:10,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162984204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:10,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:10,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:46:10,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341209556] [2024-06-21 19:46:10,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:10,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:46:10,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:10,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:46:10,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:46:10,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:46:10,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 891 transitions, 19840 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:10,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:10,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:46:10,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:13,385 INFO L124 PetriNetUnfolderBase]: 5185/7911 cut-off events. [2024-06-21 19:46:13,385 INFO L125 PetriNetUnfolderBase]: For 1057264/1057270 co-relation queries the response was YES. [2024-06-21 19:46:13,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92102 conditions, 7911 events. 5185/7911 cut-off events. For 1057264/1057270 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 46760 event pairs, 839 based on Foata normal form. 10/7917 useless extension candidates. Maximal degree in co-relation 91901. Up to 6734 conditions per place. [2024-06-21 19:46:13,534 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 763 selfloop transitions, 171 changer transitions 0/937 dead transitions. [2024-06-21 19:46:13,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 937 transitions, 22528 flow [2024-06-21 19:46:13,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:46:13,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:46:13,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2024-06-21 19:46:13,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-21 19:46:13,535 INFO L175 Difference]: Start difference. First operand has 444 places, 891 transitions, 19840 flow. Second operand 11 states and 180 transitions. [2024-06-21 19:46:13,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 937 transitions, 22528 flow [2024-06-21 19:46:18,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 937 transitions, 22008 flow, removed 29 selfloop flow, removed 10 redundant places. [2024-06-21 19:46:18,519 INFO L231 Difference]: Finished difference. Result has 445 places, 896 transitions, 19899 flow [2024-06-21 19:46:18,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=19320, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=891, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=722, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=19899, PETRI_PLACES=445, PETRI_TRANSITIONS=896} [2024-06-21 19:46:18,520 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 404 predicate places. [2024-06-21 19:46:18,520 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 896 transitions, 19899 flow [2024-06-21 19:46:18,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:18,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:18,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:46:18,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 19:46:18,521 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:46:18,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:18,521 INFO L85 PathProgramCache]: Analyzing trace with hash -2133100327, now seen corresponding path program 2 times [2024-06-21 19:46:18,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:18,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848464954] [2024-06-21 19:46:18,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:18,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:18,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:19,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:19,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:19,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848464954] [2024-06-21 19:46:19,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848464954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:19,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:19,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:46:19,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784957583] [2024-06-21 19:46:19,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:19,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:46:19,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:19,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:46:19,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:46:19,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:46:19,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 896 transitions, 19899 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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 19:46:19,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:19,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:46:19,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:22,368 INFO L124 PetriNetUnfolderBase]: 5210/7953 cut-off events. [2024-06-21 19:46:22,368 INFO L125 PetriNetUnfolderBase]: For 1059432/1059434 co-relation queries the response was YES. [2024-06-21 19:46:22,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92313 conditions, 7953 events. 5210/7953 cut-off events. For 1059432/1059434 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 47393 event pairs, 1449 based on Foata normal form. 4/7955 useless extension candidates. Maximal degree in co-relation 92111. Up to 7835 conditions per place. [2024-06-21 19:46:22,509 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 876 selfloop transitions, 47 changer transitions 0/926 dead transitions. [2024-06-21 19:46:22,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 926 transitions, 22154 flow [2024-06-21 19:46:22,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:46:22,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:46:22,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-21 19:46:22,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 19:46:22,510 INFO L175 Difference]: Start difference. First operand has 445 places, 896 transitions, 19899 flow. Second operand 9 states and 135 transitions. [2024-06-21 19:46:22,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 926 transitions, 22154 flow [2024-06-21 19:46:27,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 926 transitions, 21824 flow, removed 67 selfloop flow, removed 7 redundant places. [2024-06-21 19:46:27,555 INFO L231 Difference]: Finished difference. Result has 447 places, 908 transitions, 19854 flow [2024-06-21 19:46:27,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=19569, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=896, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=858, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=19854, PETRI_PLACES=447, PETRI_TRANSITIONS=908} [2024-06-21 19:46:27,556 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 406 predicate places. [2024-06-21 19:46:27,556 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 908 transitions, 19854 flow [2024-06-21 19:46:27,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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 19:46:27,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:27,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:46:27,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 19:46:27,557 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:46:27,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:27,557 INFO L85 PathProgramCache]: Analyzing trace with hash -280794660, now seen corresponding path program 5 times [2024-06-21 19:46:27,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:27,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300217135] [2024-06-21 19:46:27,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:27,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:27,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:29,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:29,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:29,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300217135] [2024-06-21 19:46:29,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300217135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:29,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:29,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:46:29,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250010811] [2024-06-21 19:46:29,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:29,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:46:29,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:29,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:46:29,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:46:29,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:46:29,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 908 transitions, 19854 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:29,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:29,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:46:29,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:32,614 INFO L124 PetriNetUnfolderBase]: 5227/7976 cut-off events. [2024-06-21 19:46:32,614 INFO L125 PetriNetUnfolderBase]: For 1088281/1088289 co-relation queries the response was YES. [2024-06-21 19:46:32,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92555 conditions, 7976 events. 5227/7976 cut-off events. For 1088281/1088289 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 47400 event pairs, 862 based on Foata normal form. 12/7984 useless extension candidates. Maximal degree in co-relation 92351. Up to 7333 conditions per place. [2024-06-21 19:46:32,759 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 738 selfloop transitions, 204 changer transitions 0/945 dead transitions. [2024-06-21 19:46:32,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 945 transitions, 22025 flow [2024-06-21 19:46:32,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:46:32,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:46:32,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-21 19:46:32,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4175 [2024-06-21 19:46:32,761 INFO L175 Difference]: Start difference. First operand has 447 places, 908 transitions, 19854 flow. Second operand 10 states and 167 transitions. [2024-06-21 19:46:32,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 945 transitions, 22025 flow [2024-06-21 19:46:37,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 945 transitions, 21925 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-21 19:46:37,249 INFO L231 Difference]: Finished difference. Result has 453 places, 913 transitions, 20331 flow [2024-06-21 19:46:37,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=19754, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=908, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=707, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=20331, PETRI_PLACES=453, PETRI_TRANSITIONS=913} [2024-06-21 19:46:37,250 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 412 predicate places. [2024-06-21 19:46:37,250 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 913 transitions, 20331 flow [2024-06-21 19:46:37,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:37,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:37,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:46:37,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 19:46:37,251 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:46:37,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:37,251 INFO L85 PathProgramCache]: Analyzing trace with hash -280787220, now seen corresponding path program 6 times [2024-06-21 19:46:37,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:37,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428362969] [2024-06-21 19:46:37,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:37,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:37,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:39,029 INFO 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 19:46:39,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:39,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428362969] [2024-06-21 19:46:39,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428362969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:39,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:39,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:46:39,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005409917] [2024-06-21 19:46:39,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:39,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:46:39,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:39,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:46:39,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:46:39,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:46:39,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 913 transitions, 20331 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:39,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:39,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:46:39,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:42,591 INFO L124 PetriNetUnfolderBase]: 5355/8184 cut-off events. [2024-06-21 19:46:42,591 INFO L125 PetriNetUnfolderBase]: For 1206267/1206275 co-relation queries the response was YES. [2024-06-21 19:46:42,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97559 conditions, 8184 events. 5355/8184 cut-off events. For 1206267/1206275 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 48887 event pairs, 899 based on Foata normal form. 12/8192 useless extension candidates. Maximal degree in co-relation 97354. Up to 7304 conditions per place. [2024-06-21 19:46:42,724 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 746 selfloop transitions, 207 changer transitions 0/956 dead transitions. [2024-06-21 19:46:42,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 956 transitions, 23028 flow [2024-06-21 19:46:42,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:46:42,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:46:42,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2024-06-21 19:46:42,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-21 19:46:42,726 INFO L175 Difference]: Start difference. First operand has 453 places, 913 transitions, 20331 flow. Second operand 11 states and 180 transitions. [2024-06-21 19:46:42,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 956 transitions, 23028 flow [2024-06-21 19:46:47,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 956 transitions, 22667 flow, removed 72 selfloop flow, removed 5 redundant places. [2024-06-21 19:46:48,010 INFO L231 Difference]: Finished difference. Result has 460 places, 917 transitions, 20625 flow [2024-06-21 19:46:48,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=19970, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=913, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=707, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=20625, PETRI_PLACES=460, PETRI_TRANSITIONS=917} [2024-06-21 19:46:48,011 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 419 predicate places. [2024-06-21 19:46:48,011 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 917 transitions, 20625 flow [2024-06-21 19:46:48,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:48,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:48,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:46:48,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 19:46:48,012 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:46:48,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:48,012 INFO L85 PathProgramCache]: Analyzing trace with hash -286508952, now seen corresponding path program 14 times [2024-06-21 19:46:48,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:48,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118141700] [2024-06-21 19:46:48,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:48,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:48,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:49,535 INFO 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 19:46:49,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:49,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118141700] [2024-06-21 19:46:49,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118141700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:49,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:49,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:46:49,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879142312] [2024-06-21 19:46:49,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:49,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:46:49,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:49,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:46:49,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:46:49,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:46:49,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 917 transitions, 20625 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:49,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:49,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:46:49,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:52,985 INFO L124 PetriNetUnfolderBase]: 5372/8211 cut-off events. [2024-06-21 19:46:52,985 INFO L125 PetriNetUnfolderBase]: For 1236696/1236704 co-relation queries the response was YES. [2024-06-21 19:46:53,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98746 conditions, 8211 events. 5372/8211 cut-off events. For 1236696/1236704 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 49199 event pairs, 900 based on Foata normal form. 12/8219 useless extension candidates. Maximal degree in co-relation 98538. Up to 7391 conditions per place. [2024-06-21 19:46:53,139 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 713 selfloop transitions, 230 changer transitions 0/946 dead transitions. [2024-06-21 19:46:53,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 946 transitions, 22747 flow [2024-06-21 19:46:53,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:46:53,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:46:53,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-21 19:46:53,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3975 [2024-06-21 19:46:53,141 INFO L175 Difference]: Start difference. First operand has 460 places, 917 transitions, 20625 flow. Second operand 10 states and 159 transitions. [2024-06-21 19:46:53,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 946 transitions, 22747 flow [2024-06-21 19:46:59,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 946 transitions, 22381 flow, removed 67 selfloop flow, removed 7 redundant places. [2024-06-21 19:46:59,419 INFO L231 Difference]: Finished difference. Result has 463 places, 919 transitions, 20862 flow [2024-06-21 19:46:59,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=20259, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=917, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=687, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=20862, PETRI_PLACES=463, PETRI_TRANSITIONS=919} [2024-06-21 19:46:59,420 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 422 predicate places. [2024-06-21 19:46:59,420 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 919 transitions, 20862 flow [2024-06-21 19:46:59,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:59,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:59,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:46:59,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 19:46:59,421 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:46:59,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:59,422 INFO L85 PathProgramCache]: Analyzing trace with hash -286508797, now seen corresponding path program 5 times [2024-06-21 19:46:59,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:59,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429214482] [2024-06-21 19:46:59,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:59,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:59,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:01,285 INFO 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 19:47:01,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:01,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429214482] [2024-06-21 19:47:01,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429214482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:01,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:01,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:47:01,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449840427] [2024-06-21 19:47:01,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:01,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:47:01,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:01,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:47:01,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:47:01,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:47:01,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 919 transitions, 20862 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:01,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:01,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:47:01,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:04,773 INFO L124 PetriNetUnfolderBase]: 5405/8259 cut-off events. [2024-06-21 19:47:04,773 INFO L125 PetriNetUnfolderBase]: For 1242983/1242991 co-relation queries the response was YES. [2024-06-21 19:47:04,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99625 conditions, 8259 events. 5405/8259 cut-off events. For 1242983/1242991 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 49475 event pairs, 904 based on Foata normal form. 10/8265 useless extension candidates. Maximal degree in co-relation 99415. Up to 7430 conditions per place. [2024-06-21 19:47:04,909 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 715 selfloop transitions, 236 changer transitions 0/954 dead transitions. [2024-06-21 19:47:04,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 954 transitions, 23079 flow [2024-06-21 19:47:04,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:47:04,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:47:04,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-21 19:47:04,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 19:47:04,910 INFO L175 Difference]: Start difference. First operand has 463 places, 919 transitions, 20862 flow. Second operand 10 states and 160 transitions. [2024-06-21 19:47:04,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 954 transitions, 23079 flow [2024-06-21 19:47:10,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 954 transitions, 22494 flow, removed 64 selfloop flow, removed 8 redundant places. [2024-06-21 19:47:10,835 INFO L231 Difference]: Finished difference. Result has 465 places, 927 transitions, 20983 flow [2024-06-21 19:47:10,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=20277, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=919, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=683, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=20983, PETRI_PLACES=465, PETRI_TRANSITIONS=927} [2024-06-21 19:47:10,836 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 424 predicate places. [2024-06-21 19:47:10,836 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 927 transitions, 20983 flow [2024-06-21 19:47:10,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:10,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:10,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:10,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 19:47:10,837 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:47:10,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:10,837 INFO L85 PathProgramCache]: Analyzing trace with hash -281002422, now seen corresponding path program 15 times [2024-06-21 19:47:10,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:10,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706145038] [2024-06-21 19:47:10,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:10,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:10,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:12,417 INFO 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 19:47:12,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:12,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706145038] [2024-06-21 19:47:12,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706145038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:12,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:12,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:47:12,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035261574] [2024-06-21 19:47:12,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:12,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:47:12,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:12,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:47:12,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:47:12,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:47:12,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 927 transitions, 20983 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:12,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:12,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:47:12,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:15,700 INFO L124 PetriNetUnfolderBase]: 5422/8286 cut-off events. [2024-06-21 19:47:15,700 INFO L125 PetriNetUnfolderBase]: For 1280428/1280436 co-relation queries the response was YES. [2024-06-21 19:47:15,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100485 conditions, 8286 events. 5422/8286 cut-off events. For 1280428/1280436 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 49686 event pairs, 905 based on Foata normal form. 12/8294 useless extension candidates. Maximal degree in co-relation 100274. Up to 7466 conditions per place. [2024-06-21 19:47:15,851 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 724 selfloop transitions, 229 changer transitions 0/956 dead transitions. [2024-06-21 19:47:15,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 956 transitions, 23131 flow [2024-06-21 19:47:15,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:47:15,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:47:15,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 19:47:15,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-21 19:47:15,853 INFO L175 Difference]: Start difference. First operand has 465 places, 927 transitions, 20983 flow. Second operand 9 states and 154 transitions. [2024-06-21 19:47:15,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 956 transitions, 23131 flow [2024-06-21 19:47:22,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 956 transitions, 22549 flow, removed 60 selfloop flow, removed 8 redundant places. [2024-06-21 19:47:22,054 INFO L231 Difference]: Finished difference. Result has 466 places, 929 transitions, 21008 flow [2024-06-21 19:47:22,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=20401, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=927, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=698, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=21008, PETRI_PLACES=466, PETRI_TRANSITIONS=929} [2024-06-21 19:47:22,055 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 425 predicate places. [2024-06-21 19:47:22,055 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 929 transitions, 21008 flow [2024-06-21 19:47:22,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:22,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:22,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:22,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 19:47:22,055 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:47:22,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:22,055 INFO L85 PathProgramCache]: Analyzing trace with hash -280996470, now seen corresponding path program 7 times [2024-06-21 19:47:22,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:22,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693309458] [2024-06-21 19:47:22,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:22,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:22,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:23,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:23,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:23,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693309458] [2024-06-21 19:47:23,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693309458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:23,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:23,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:47:23,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862443489] [2024-06-21 19:47:23,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:23,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:47:23,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:23,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:47:23,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:47:23,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:47:23,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 929 transitions, 21008 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:23,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:23,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:47:23,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:26,866 INFO L124 PetriNetUnfolderBase]: 5414/8274 cut-off events. [2024-06-21 19:47:26,866 INFO L125 PetriNetUnfolderBase]: For 1285050/1285058 co-relation queries the response was YES. [2024-06-21 19:47:26,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100205 conditions, 8274 events. 5414/8274 cut-off events. For 1285050/1285058 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 49599 event pairs, 893 based on Foata normal form. 12/8282 useless extension candidates. Maximal degree in co-relation 99993. Up to 7631 conditions per place. [2024-06-21 19:47:27,026 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 755 selfloop transitions, 200 changer transitions 0/958 dead transitions. [2024-06-21 19:47:27,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 958 transitions, 23056 flow [2024-06-21 19:47:27,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:47:27,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:47:27,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 19:47:27,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 19:47:27,029 INFO L175 Difference]: Start difference. First operand has 466 places, 929 transitions, 21008 flow. Second operand 9 states and 153 transitions. [2024-06-21 19:47:27,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 958 transitions, 23056 flow [2024-06-21 19:47:33,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 958 transitions, 22467 flow, removed 67 selfloop flow, removed 7 redundant places. [2024-06-21 19:47:33,506 INFO L231 Difference]: Finished difference. Result has 469 places, 931 transitions, 20879 flow [2024-06-21 19:47:33,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=20419, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=929, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=729, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=20879, PETRI_PLACES=469, PETRI_TRANSITIONS=931} [2024-06-21 19:47:33,507 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 428 predicate places. [2024-06-21 19:47:33,507 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 931 transitions, 20879 flow [2024-06-21 19:47:33,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:33,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:33,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:33,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 19:47:33,508 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:47:33,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:33,509 INFO L85 PathProgramCache]: Analyzing trace with hash -286512672, now seen corresponding path program 16 times [2024-06-21 19:47:33,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:33,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171738570] [2024-06-21 19:47:33,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:33,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:33,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:35,031 INFO 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 19:47:35,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:35,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171738570] [2024-06-21 19:47:35,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171738570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:35,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:35,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:47:35,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548972616] [2024-06-21 19:47:35,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:35,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:47:35,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:35,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:47:35,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:47:35,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:47:35,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 931 transitions, 20879 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:35,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:35,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:47:35,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:38,658 INFO L124 PetriNetUnfolderBase]: 5431/8301 cut-off events. [2024-06-21 19:47:38,658 INFO L125 PetriNetUnfolderBase]: For 1308632/1308640 co-relation queries the response was YES. [2024-06-21 19:47:38,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100560 conditions, 8301 events. 5431/8301 cut-off events. For 1308632/1308640 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 49781 event pairs, 896 based on Foata normal form. 12/8309 useless extension candidates. Maximal degree in co-relation 100346. Up to 7398 conditions per place. [2024-06-21 19:47:38,805 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 728 selfloop transitions, 235 changer transitions 0/966 dead transitions. [2024-06-21 19:47:38,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 966 transitions, 23583 flow [2024-06-21 19:47:38,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:47:38,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:47:38,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 19:47:38,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-21 19:47:38,807 INFO L175 Difference]: Start difference. First operand has 469 places, 931 transitions, 20879 flow. Second operand 9 states and 154 transitions. [2024-06-21 19:47:38,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 966 transitions, 23583 flow [2024-06-21 19:47:43,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 966 transitions, 23153 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 19:47:43,737 INFO L231 Difference]: Finished difference. Result has 473 places, 936 transitions, 21231 flow [2024-06-21 19:47:43,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=20449, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=931, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=698, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=21231, PETRI_PLACES=473, PETRI_TRANSITIONS=936} [2024-06-21 19:47:43,738 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 432 predicate places. [2024-06-21 19:47:43,738 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 936 transitions, 21231 flow [2024-06-21 19:47:43,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:43,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:43,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:43,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 19:47:43,739 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:47:43,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:43,739 INFO L85 PathProgramCache]: Analyzing trace with hash 243724431, now seen corresponding path program 6 times [2024-06-21 19:47:43,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:43,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676505697] [2024-06-21 19:47:43,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:43,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:43,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:45,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:45,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:45,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676505697] [2024-06-21 19:47:45,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676505697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:45,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:45,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:47:45,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358460888] [2024-06-21 19:47:45,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:45,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:47:45,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:45,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:47:45,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:47:45,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:47:45,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 936 transitions, 21231 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:45,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:45,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:47:45,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:48,426 INFO L124 PetriNetUnfolderBase]: 5442/8317 cut-off events. [2024-06-21 19:47:48,426 INFO L125 PetriNetUnfolderBase]: For 1327731/1327739 co-relation queries the response was YES. [2024-06-21 19:47:48,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101241 conditions, 8317 events. 5442/8317 cut-off events. For 1327731/1327739 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 49878 event pairs, 903 based on Foata normal form. 10/8323 useless extension candidates. Maximal degree in co-relation 101025. Up to 7470 conditions per place. [2024-06-21 19:47:48,818 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 718 selfloop transitions, 240 changer transitions 0/961 dead transitions. [2024-06-21 19:47:48,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 961 transitions, 23375 flow [2024-06-21 19:47:48,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:47:48,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:47:48,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 19:47:48,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-21 19:47:48,820 INFO L175 Difference]: Start difference. First operand has 473 places, 936 transitions, 21231 flow. Second operand 8 states and 141 transitions. [2024-06-21 19:47:48,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 961 transitions, 23375 flow [2024-06-21 19:47:54,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 961 transitions, 22929 flow, removed 95 selfloop flow, removed 5 redundant places. [2024-06-21 19:47:54,494 INFO L231 Difference]: Finished difference. Result has 476 places, 939 transitions, 21436 flow [2024-06-21 19:47:54,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=20785, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=936, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=696, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=21436, PETRI_PLACES=476, PETRI_TRANSITIONS=939} [2024-06-21 19:47:54,495 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 435 predicate places. [2024-06-21 19:47:54,495 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 939 transitions, 21436 flow [2024-06-21 19:47:54,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:54,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:54,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:54,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 19:47:54,495 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:47:54,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:54,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1281059464, now seen corresponding path program 8 times [2024-06-21 19:47:54,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:54,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080497218] [2024-06-21 19:47:54,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:54,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:54,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:56,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:56,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:56,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080497218] [2024-06-21 19:47:56,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080497218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:56,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:56,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:47:56,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679892309] [2024-06-21 19:47:56,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:56,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:47:56,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:56,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:47:56,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:47:56,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:47:56,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 939 transitions, 21436 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:56,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:56,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:47:56,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:59,917 INFO L124 PetriNetUnfolderBase]: 5570/8525 cut-off events. [2024-06-21 19:47:59,917 INFO L125 PetriNetUnfolderBase]: For 1463411/1463419 co-relation queries the response was YES. [2024-06-21 19:48:00,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106603 conditions, 8525 events. 5570/8525 cut-off events. For 1463411/1463419 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 51428 event pairs, 935 based on Foata normal form. 12/8533 useless extension candidates. Maximal degree in co-relation 106385. Up to 7640 conditions per place. [2024-06-21 19:48:00,311 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 753 selfloop transitions, 226 changer transitions 0/982 dead transitions. [2024-06-21 19:48:00,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 982 transitions, 24285 flow [2024-06-21 19:48:00,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:48:00,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:48:00,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2024-06-21 19:48:00,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-21 19:48:00,313 INFO L175 Difference]: Start difference. First operand has 476 places, 939 transitions, 21436 flow. Second operand 11 states and 180 transitions. [2024-06-21 19:48:00,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 982 transitions, 24285 flow [2024-06-21 19:48:05,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 982 transitions, 23712 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-21 19:48:05,765 INFO L231 Difference]: Finished difference. Result has 481 places, 942 transitions, 21536 flow [2024-06-21 19:48:05,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=20863, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=939, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=714, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=21536, PETRI_PLACES=481, PETRI_TRANSITIONS=942} [2024-06-21 19:48:05,766 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 440 predicate places. [2024-06-21 19:48:05,766 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 942 transitions, 21536 flow [2024-06-21 19:48:05,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:05,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:05,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:48:05,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 19:48:05,766 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:48:05,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:05,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1281274666, now seen corresponding path program 17 times [2024-06-21 19:48:05,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:05,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179056508] [2024-06-21 19:48:05,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:05,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:05,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat