./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix010.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix010.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix010.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix010.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 23:16:15,813 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 23:16:15,878 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 23:16:15,883 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 23:16:15,884 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 23:16:15,908 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 23:16:15,909 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 23:16:15,909 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 23:16:15,910 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 23:16:15,913 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 23:16:15,913 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 23:16:15,913 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 23:16:15,914 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 23:16:15,915 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 23:16:15,915 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 23:16:15,916 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 23:16:15,916 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 23:16:15,916 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 23:16:15,916 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 23:16:15,917 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 23:16:15,917 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 23:16:15,917 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 23:16:15,918 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 23:16:15,918 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 23:16:15,918 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 23:16:15,918 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 23:16:15,918 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 23:16:15,919 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 23:16:15,919 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 23:16:15,919 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 23:16:15,920 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 23:16:15,920 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 23:16:15,921 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 23:16:15,921 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 23:16:15,921 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 23:16:15,921 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 23:16:15,921 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 23:16:15,922 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 23:16:15,922 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 23:16:15,922 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 23:16:15,922 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 23:16:15,922 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 23:16:15,923 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 23:16:15,923 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 23:16:16,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 23:16:16,140 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 23:16:16,142 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 23:16:16,143 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 23:16:16,143 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 23:16:16,144 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix010.oepc.i [2024-06-27 23:16:17,159 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 23:16:17,362 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 23:16:17,362 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix010.oepc.i [2024-06-27 23:16:17,376 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6926bff2d/ef0264b9ae23472f945cf72e0be1500a/FLAGd34a9bad3 [2024-06-27 23:16:17,386 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6926bff2d/ef0264b9ae23472f945cf72e0be1500a [2024-06-27 23:16:17,388 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 23:16:17,389 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 23:16:17,389 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix010.oepc.yml/witness.yml [2024-06-27 23:16:17,469 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 23:16:17,470 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 23:16:17,471 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 23:16:17,472 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 23:16:17,475 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 23:16:17,476 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 11:16:17" (1/2) ... [2024-06-27 23:16:17,476 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d844c83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:16:17, skipping insertion in model container [2024-06-27 23:16:17,477 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 11:16:17" (1/2) ... [2024-06-27 23:16:17,479 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@dd0aae3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:16:17, skipping insertion in model container [2024-06-27 23:16:17,479 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:16:17" (2/2) ... [2024-06-27 23:16:17,480 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d844c83 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:16:17, skipping insertion in model container [2024-06-27 23:16:17,480 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:16:17" (2/2) ... [2024-06-27 23:16:17,480 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 23:16:17,507 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 23:16:17,509 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p1_EBX) + (long long )z >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )z >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a$mem_tmp >= 0LL) && (0LL - (long long )a$flush_delayed) + (long long )a$r_buff0_thd1 >= 0LL) && (0LL - (long long )a$flush_delayed) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$flush_delayed) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff0_thd0) + (long long )a$r_buff0_thd1 >= 0LL) && (0LL - (long long )a$r_buff0_thd0) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff0_thd0) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff0_thd1) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff0_thd2) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff0_thd2) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff0_thd3) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff0_thd3) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff1_thd0) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff1_thd0) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff1_thd1) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff1_thd1) + (long long )a$w_buff1 >= 0LL) && (0LL - (long long )a$r_buff1_thd2) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff1_thd2) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff1_thd3) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff1_thd3) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$read_delayed) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$read_delayed) + (long long )a$w_buff0_used >= 0LL) && (1LL - (long long )a$r_buff0_thd1) + (long long )a$w_buff0_used >= 0LL) && (1LL - (long long )a$r_buff1_thd1) + (long long )a$w_buff0_used >= 0LL) && (1LL - (long long )a$w_buff0) + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_cnt + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_cnt + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_cnt + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_p1_EBX + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p1_EBX + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_p1_EBX + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )a$w_buff0_used >= 0LL) && (long long )a + (long long )a$r_buff0_thd1 >= 0LL) && (long long )a + (long long )a$w_buff0 >= 0LL) && (long long )a + (long long )a$w_buff0_used >= 0LL) && (long long )a$flush_delayed + (long long )a$r_buff0_thd1 >= 0LL) && (long long )a$flush_delayed + (long long )a$w_buff0 >= 0LL) && (long long )a$flush_delayed + (long long )a$w_buff0_used >= 0LL) && (long long )a$mem_tmp + (long long )a$r_buff0_thd1 >= 0LL) && (long long )a$mem_tmp + (long long )a$w_buff0 >= 0LL) && (long long )a$mem_tmp + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd0 + (long long )a$r_buff0_thd1 >= 0LL) && (long long )a$r_buff0_thd0 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd0 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff0_thd2 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff0_thd3 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff1_thd0 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff1_thd1 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff1_thd2 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff1_thd3 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$read_delayed >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$w_buff1 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$w_buff1_used >= 0LL) && (long long )a$r_buff0_thd1 + (long long )main$tmp_guard1 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )x >= 0LL) && (long long )a$r_buff0_thd1 + (long long )y >= 0LL) && (long long )a$r_buff0_thd1 + (long long )z >= 0LL) && (long long )a$r_buff0_thd1 + (long long )weak$$choice0 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )weak$$choice2 >= 0LL) && (long long )a$r_buff0_thd2 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd2 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd3 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd3 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff1_thd0 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff1_thd0 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff1_thd1 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff1_thd1 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff1_thd2 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff1_thd2 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff1_thd3 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff1_thd3 + (long long )a$w_buff0_used >= 0LL) && (long long )a$read_delayed + (long long )a$w_buff0 >= 0LL) && (long long )a$read_delayed + (long long )a$w_buff0_used >= 0LL) && (long long )a$w_buff0 + (long long )a$w_buff0_used >= 0LL) && (long long )a$w_buff0 + (long long )a$w_buff1 >= 0LL) && (long long )a$w_buff0 + (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff0 + (long long )main$tmp_guard1 >= 0LL) && (long long )a$w_buff0 + (long long )x >= 0LL) && (long long )a$w_buff0 + (long long )y >= 0LL) && (long long )a$w_buff0 + (long long )z >= 0LL) && (long long )a$w_buff0 + (long long )weak$$choice0 >= 0LL) && (long long )a$w_buff0 + (long long )weak$$choice2 >= 0LL) && (long long )a$w_buff0_used + (long long )a$w_buff1 >= 0LL) && (long long )a$w_buff0_used + (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff0_used + (long long )main$tmp_guard1 >= 0LL) && (long long )a$w_buff0_used + (long long )x >= 0LL) && (long long )a$w_buff0_used + (long long )y >= 0LL) && (long long )a$w_buff0_used + (long long )z >= 0LL) && (long long )a$w_buff0_used + (long long )weak$$choice0 >= 0LL) && (long long )a$w_buff0_used + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )a$w_buff0_used) - (long long )a$w_buff1 >= 0LL) && (long long )__unbuffered_p2_EBX - (long long )a$mem_tmp >= 0LL) && (long long )a - (long long )a$mem_tmp >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff0_thd2 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff0_thd3 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff1_thd0 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff1_thd1 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff1_thd2 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff1_thd3 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$read_delayed >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$w_buff1 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$w_buff1_used >= 0LL) && (long long )a$r_buff1_thd1 - (long long )a$w_buff1 >= 0LL) && (long long )a$r_buff1_thd1 - (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff0 - (long long )a$w_buff0_used >= 0LL) && (long long )a$w_buff0 - (long long )a$w_buff1 >= 0LL) && (long long )a$w_buff0 - (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff0_used - (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff1 - (long long )a$w_buff1_used >= 0LL) [2024-06-27 23:16:17,509 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p1_EBX) + (long long )z >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )z >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a$mem_tmp >= 0LL) && (0LL - (long long )a$flush_delayed) + (long long )a$r_buff0_thd1 >= 0LL) && (0LL - (long long )a$flush_delayed) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$flush_delayed) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff0_thd0) + (long long )a$r_buff0_thd1 >= 0LL) && (0LL - (long long )a$r_buff0_thd0) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff0_thd0) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff0_thd1) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff0_thd2) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff0_thd2) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff0_thd3) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff0_thd3) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff1_thd0) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff1_thd0) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff1_thd1) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff1_thd1) + (long long )a$w_buff1 >= 0LL) && (0LL - (long long )a$r_buff1_thd2) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff1_thd2) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff1_thd3) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff1_thd3) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$read_delayed) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$read_delayed) + (long long )a$w_buff0_used >= 0LL) && (1LL - (long long )a$r_buff0_thd1) + (long long )a$w_buff0_used >= 0LL) && (1LL - (long long )a$r_buff1_thd1) + (long long )a$w_buff0_used >= 0LL) && (1LL - (long long )a$w_buff0) + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_cnt + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_cnt + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_cnt + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_p1_EBX + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p1_EBX + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_p1_EBX + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )a$w_buff0_used >= 0LL) && (long long )a + (long long )a$r_buff0_thd1 >= 0LL) && (long long )a + (long long )a$w_buff0 >= 0LL) && (long long )a + (long long )a$w_buff0_used >= 0LL) && (long long )a$flush_delayed + (long long )a$r_buff0_thd1 >= 0LL) && (long long )a$flush_delayed + (long long )a$w_buff0 >= 0LL) && (long long )a$flush_delayed + (long long )a$w_buff0_used >= 0LL) && (long long )a$mem_tmp + (long long )a$r_buff0_thd1 >= 0LL) && (long long )a$mem_tmp + (long long )a$w_buff0 >= 0LL) && (long long )a$mem_tmp + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd0 + (long long )a$r_buff0_thd1 >= 0LL) && (long long )a$r_buff0_thd0 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd0 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff0_thd2 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff0_thd3 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff1_thd0 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff1_thd1 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff1_thd2 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff1_thd3 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$read_delayed >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$w_buff1 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$w_buff1_used >= 0LL) && (long long )a$r_buff0_thd1 + (long long )main$tmp_guard1 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )x >= 0LL) && (long long )a$r_buff0_thd1 + (long long )y >= 0LL) && (long long )a$r_buff0_thd1 + (long long )z >= 0LL) && (long long )a$r_buff0_thd1 + (long long )weak$$choice0 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )weak$$choice2 >= 0LL) && (long long )a$r_buff0_thd2 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd2 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd3 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd3 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff1_thd0 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff1_thd0 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff1_thd1 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff1_thd1 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff1_thd2 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff1_thd2 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff1_thd3 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff1_thd3 + (long long )a$w_buff0_used >= 0LL) && (long long )a$read_delayed + (long long )a$w_buff0 >= 0LL) && (long long )a$read_delayed + (long long )a$w_buff0_used >= 0LL) && (long long )a$w_buff0 + (long long )a$w_buff0_used >= 0LL) && (long long )a$w_buff0 + (long long )a$w_buff1 >= 0LL) && (long long )a$w_buff0 + (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff0 + (long long )main$tmp_guard1 >= 0LL) && (long long )a$w_buff0 + (long long )x >= 0LL) && (long long )a$w_buff0 + (long long )y >= 0LL) && (long long )a$w_buff0 + (long long )z >= 0LL) && (long long )a$w_buff0 + (long long )weak$$choice0 >= 0LL) && (long long )a$w_buff0 + (long long )weak$$choice2 >= 0LL) && (long long )a$w_buff0_used + (long long )a$w_buff1 >= 0LL) && (long long )a$w_buff0_used + (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff0_used + (long long )main$tmp_guard1 >= 0LL) && (long long )a$w_buff0_used + (long long )x >= 0LL) && (long long )a$w_buff0_used + (long long )y >= 0LL) && (long long )a$w_buff0_used + (long long )z >= 0LL) && (long long )a$w_buff0_used + (long long )weak$$choice0 >= 0LL) && (long long )a$w_buff0_used + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )a$w_buff0_used) - (long long )a$w_buff1 >= 0LL) && (long long )__unbuffered_p2_EBX - (long long )a$mem_tmp >= 0LL) && (long long )a - (long long )a$mem_tmp >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff0_thd2 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff0_thd3 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff1_thd0 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff1_thd1 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff1_thd2 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff1_thd3 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$read_delayed >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$w_buff1 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$w_buff1_used >= 0LL) && (long long )a$r_buff1_thd1 - (long long )a$w_buff1 >= 0LL) && (long long )a$r_buff1_thd1 - (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff0 - (long long )a$w_buff0_used >= 0LL) && (long long )a$w_buff0 - (long long )a$w_buff1 >= 0LL) && (long long )a$w_buff0 - (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff0_used - (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff1 - (long long )a$w_buff1_used >= 0LL) [2024-06-27 23:16:17,509 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p1_EBX) + (long long )z >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )z >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a$mem_tmp >= 0LL) && (0LL - (long long )a$flush_delayed) + (long long )a$r_buff0_thd1 >= 0LL) && (0LL - (long long )a$flush_delayed) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$flush_delayed) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff0_thd0) + (long long )a$r_buff0_thd1 >= 0LL) && (0LL - (long long )a$r_buff0_thd0) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff0_thd0) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff0_thd1) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff0_thd2) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff0_thd2) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff0_thd3) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff0_thd3) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff1_thd0) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff1_thd0) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff1_thd1) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff1_thd1) + (long long )a$w_buff1 >= 0LL) && (0LL - (long long )a$r_buff1_thd2) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff1_thd2) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff1_thd3) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff1_thd3) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$read_delayed) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$read_delayed) + (long long )a$w_buff0_used >= 0LL) && (1LL - (long long )a$r_buff0_thd1) + (long long )a$w_buff0_used >= 0LL) && (1LL - (long long )a$r_buff1_thd1) + (long long )a$w_buff0_used >= 0LL) && (1LL - (long long )a$w_buff0) + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_cnt + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_cnt + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_cnt + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_p1_EBX + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p1_EBX + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_p1_EBX + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )a$w_buff0_used >= 0LL) && (long long )a + (long long )a$r_buff0_thd1 >= 0LL) && (long long )a + (long long )a$w_buff0 >= 0LL) && (long long )a + (long long )a$w_buff0_used >= 0LL) && (long long )a$flush_delayed + (long long )a$r_buff0_thd1 >= 0LL) && (long long )a$flush_delayed + (long long )a$w_buff0 >= 0LL) && (long long )a$flush_delayed + (long long )a$w_buff0_used >= 0LL) && (long long )a$mem_tmp + (long long )a$r_buff0_thd1 >= 0LL) && (long long )a$mem_tmp + (long long )a$w_buff0 >= 0LL) && (long long )a$mem_tmp + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd0 + (long long )a$r_buff0_thd1 >= 0LL) && (long long )a$r_buff0_thd0 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd0 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff0_thd2 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff0_thd3 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff1_thd0 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff1_thd1 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff1_thd2 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff1_thd3 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$read_delayed >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$w_buff1 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$w_buff1_used >= 0LL) && (long long )a$r_buff0_thd1 + (long long )main$tmp_guard1 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )x >= 0LL) && (long long )a$r_buff0_thd1 + (long long )y >= 0LL) && (long long )a$r_buff0_thd1 + (long long )z >= 0LL) && (long long )a$r_buff0_thd1 + (long long )weak$$choice0 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )weak$$choice2 >= 0LL) && (long long )a$r_buff0_thd2 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd2 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd3 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd3 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff1_thd0 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff1_thd0 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff1_thd1 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff1_thd1 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff1_thd2 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff1_thd2 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff1_thd3 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff1_thd3 + (long long )a$w_buff0_used >= 0LL) && (long long )a$read_delayed + (long long )a$w_buff0 >= 0LL) && (long long )a$read_delayed + (long long )a$w_buff0_used >= 0LL) && (long long )a$w_buff0 + (long long )a$w_buff0_used >= 0LL) && (long long )a$w_buff0 + (long long )a$w_buff1 >= 0LL) && (long long )a$w_buff0 + (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff0 + (long long )main$tmp_guard1 >= 0LL) && (long long )a$w_buff0 + (long long )x >= 0LL) && (long long )a$w_buff0 + (long long )y >= 0LL) && (long long )a$w_buff0 + (long long )z >= 0LL) && (long long )a$w_buff0 + (long long )weak$$choice0 >= 0LL) && (long long )a$w_buff0 + (long long )weak$$choice2 >= 0LL) && (long long )a$w_buff0_used + (long long )a$w_buff1 >= 0LL) && (long long )a$w_buff0_used + (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff0_used + (long long )main$tmp_guard1 >= 0LL) && (long long )a$w_buff0_used + (long long )x >= 0LL) && (long long )a$w_buff0_used + (long long )y >= 0LL) && (long long )a$w_buff0_used + (long long )z >= 0LL) && (long long )a$w_buff0_used + (long long )weak$$choice0 >= 0LL) && (long long )a$w_buff0_used + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )a$w_buff0_used) - (long long )a$w_buff1 >= 0LL) && (long long )__unbuffered_p2_EBX - (long long )a$mem_tmp >= 0LL) && (long long )a - (long long )a$mem_tmp >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff0_thd2 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff0_thd3 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff1_thd0 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff1_thd1 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff1_thd2 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff1_thd3 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$read_delayed >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$w_buff1 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$w_buff1_used >= 0LL) && (long long )a$r_buff1_thd1 - (long long )a$w_buff1 >= 0LL) && (long long )a$r_buff1_thd1 - (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff0 - (long long )a$w_buff0_used >= 0LL) && (long long )a$w_buff0 - (long long )a$w_buff1 >= 0LL) && (long long )a$w_buff0 - (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff0_used - (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff1 - (long long )a$w_buff1_used >= 0LL) [2024-06-27 23:16:17,509 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 23:16:17,510 INFO L106 edCorrectnessWitness]: ghost_update [L851-L851] multithreaded = 1; [2024-06-27 23:16:17,543 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 23:16:17,850 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 23:16:17,858 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 23:16:18,076 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 23:16:18,122 INFO L206 MainTranslator]: Completed translation [2024-06-27 23:16:18,122 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:16:18 WrapperNode [2024-06-27 23:16:18,123 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 23:16:18,123 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 23:16:18,123 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 23:16:18,124 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 23:16:18,128 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:16:18" (1/1) ... [2024-06-27 23:16:18,146 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:16:18" (1/1) ... [2024-06-27 23:16:18,194 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 129 [2024-06-27 23:16:18,195 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 23:16:18,195 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 23:16:18,195 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 23:16:18,195 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 23:16:18,204 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:16:18" (1/1) ... [2024-06-27 23:16:18,204 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:16:18" (1/1) ... [2024-06-27 23:16:18,210 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:16:18" (1/1) ... [2024-06-27 23:16:18,226 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 23:16:18,226 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:16:18" (1/1) ... [2024-06-27 23:16:18,227 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:16:18" (1/1) ... [2024-06-27 23:16:18,239 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:16:18" (1/1) ... [2024-06-27 23:16:18,240 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:16:18" (1/1) ... [2024-06-27 23:16:18,243 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:16:18" (1/1) ... [2024-06-27 23:16:18,246 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:16:18" (1/1) ... [2024-06-27 23:16:18,250 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 23:16:18,252 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 23:16:18,253 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 23:16:18,253 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 23:16:18,254 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:16:18" (1/1) ... [2024-06-27 23:16:18,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 23:16:18,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 23:16:18,310 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 23:16:18,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 23:16:18,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 23:16:18,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 23:16:18,389 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 23:16:18,389 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 23:16:18,389 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 23:16:18,389 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 23:16:18,390 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 23:16:18,390 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 23:16:18,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 23:16:18,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 23:16:18,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 23:16:18,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 23:16:18,391 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 23:16:18,527 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 23:16:18,529 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 23:16:19,030 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 23:16:19,030 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 23:16:19,213 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 23:16:19,213 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 23:16:19,214 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 11:16:19 BoogieIcfgContainer [2024-06-27 23:16:19,214 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 23:16:19,217 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 23:16:19,218 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 23:16:19,220 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 23:16:19,220 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 11:16:17" (1/4) ... [2024-06-27 23:16:19,221 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@218ec5a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 11:16:19, skipping insertion in model container [2024-06-27 23:16:19,221 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:16:17" (2/4) ... [2024-06-27 23:16:19,221 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@218ec5a6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 11:16:19, skipping insertion in model container [2024-06-27 23:16:19,221 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:16:18" (3/4) ... [2024-06-27 23:16:19,224 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@218ec5a6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 11:16:19, skipping insertion in model container [2024-06-27 23:16:19,224 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 11:16:19" (4/4) ... [2024-06-27 23:16:19,225 INFO L112 eAbstractionObserver]: Analyzing ICFG mix010.oepc.i [2024-06-27 23:16:19,239 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 23:16:19,239 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 23:16:19,239 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 23:16:19,295 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 23:16:19,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-27 23:16:19,356 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-27 23:16:19,357 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 23:16:19,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 71 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 23:16:19,358 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-27 23:16:19,361 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-27 23:16:19,372 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 23:16:19,378 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;@224bbab4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 23:16:19,379 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 23:16:19,383 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 23:16:19,383 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-27 23:16:19,383 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 23:16:19,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:16:19,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 23:16:19,385 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:16:19,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:16:19,427 INFO L85 PathProgramCache]: Analyzing trace with hash 382731927, now seen corresponding path program 1 times [2024-06-27 23:16:19,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:16:19,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662650657] [2024-06-27 23:16:19,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:16:19,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:16:19,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:16:21,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:16:21,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:16:21,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662650657] [2024-06-27 23:16:21,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662650657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:16:21,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:16:21,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 23:16:21,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239631550] [2024-06-27 23:16:21,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:16:21,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 23:16:21,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:16:21,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 23:16:21,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 23:16:21,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-27 23:16:21,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:21,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:16:21,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-27 23:16:21,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:16:21,861 INFO L124 PetriNetUnfolderBase]: 1359/2139 cut-off events. [2024-06-27 23:16:21,861 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-27 23:16:21,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4253 conditions, 2139 events. 1359/2139 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10850 event pairs, 941 based on Foata normal form. 1/2097 useless extension candidates. Maximal degree in co-relation 4241. Up to 2029 conditions per place. [2024-06-27 23:16:21,877 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 32 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-27 23:16:21,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 175 flow [2024-06-27 23:16:21,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 23:16:21,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 23:16:21,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-06-27 23:16:21,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627906976744186 [2024-06-27 23:16:21,889 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 81 transitions. [2024-06-27 23:16:21,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 175 flow [2024-06-27 23:16:21,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 23:16:21,894 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-27 23:16:21,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-27 23:16:21,898 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-27 23:16:21,898 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-27 23:16:21,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:21,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:16:21,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:16:21,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 23:16:21,899 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:16:21,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:16:21,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1561535066, now seen corresponding path program 1 times [2024-06-27 23:16:21,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:16:21,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379390297] [2024-06-27 23:16:21,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:16:21,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:16:21,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:16:23,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:16:23,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:16:23,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379390297] [2024-06-27 23:16:23,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379390297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:16:23,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:16:23,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 23:16:23,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332911622] [2024-06-27 23:16:23,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:16:23,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 23:16:23,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:16:23,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 23:16:23,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 23:16:23,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-27 23:16:23,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:23,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:16:23,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-27 23:16:23,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:16:23,891 INFO L124 PetriNetUnfolderBase]: 1353/2136 cut-off events. [2024-06-27 23:16:23,891 INFO L125 PetriNetUnfolderBase]: For 418/418 co-relation queries the response was YES. [2024-06-27 23:16:23,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4792 conditions, 2136 events. 1353/2136 cut-off events. For 418/418 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10853 event pairs, 795 based on Foata normal form. 3/2132 useless extension candidates. Maximal degree in co-relation 4780. Up to 2005 conditions per place. [2024-06-27 23:16:23,903 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 39 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-27 23:16:23,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 242 flow [2024-06-27 23:16:23,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 23:16:23,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 23:16:23,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-06-27 23:16:23,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6104651162790697 [2024-06-27 23:16:23,906 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 105 transitions. [2024-06-27 23:16:23,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 242 flow [2024-06-27 23:16:23,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 23:16:23,911 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-27 23:16:23,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-27 23:16:23,912 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-27 23:16:23,912 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-27 23:16:23,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:23,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:16:23,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:16:23,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 23:16:23,915 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:16:23,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:16:23,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1691570235, now seen corresponding path program 1 times [2024-06-27 23:16:23,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:16:23,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856509219] [2024-06-27 23:16:23,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:16:23,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:16:23,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:16:26,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:16:26,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:16:26,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856509219] [2024-06-27 23:16:26,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856509219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:16:26,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:16:26,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:16:26,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748368949] [2024-06-27 23:16:26,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:16:26,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:16:26,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:16:26,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:16:26,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:16:26,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-27 23:16:26,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:26,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:16:26,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-27 23:16:26,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:16:26,780 INFO L124 PetriNetUnfolderBase]: 1641/2562 cut-off events. [2024-06-27 23:16:26,781 INFO L125 PetriNetUnfolderBase]: For 1353/1353 co-relation queries the response was YES. [2024-06-27 23:16:26,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6345 conditions, 2562 events. 1641/2562 cut-off events. For 1353/1353 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12927 event pairs, 746 based on Foata normal form. 3/2555 useless extension candidates. Maximal degree in co-relation 6331. Up to 2393 conditions per place. [2024-06-27 23:16:26,793 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 54 selfloop transitions, 13 changer transitions 0/74 dead transitions. [2024-06-27 23:16:26,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 74 transitions, 376 flow [2024-06-27 23:16:26,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:16:26,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:16:26,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 23:16:26,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5736434108527132 [2024-06-27 23:16:26,798 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 6 states and 148 transitions. [2024-06-27 23:16:26,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 74 transitions, 376 flow [2024-06-27 23:16:26,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 74 transitions, 356 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 23:16:26,800 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 198 flow [2024-06-27 23:16:26,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, 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=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=198, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-27 23:16:26,801 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2024-06-27 23:16:26,801 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 198 flow [2024-06-27 23:16:26,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:26,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:16:26,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:16:26,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 23:16:26,802 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:16:26,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:16:26,802 INFO L85 PathProgramCache]: Analyzing trace with hash 819869989, now seen corresponding path program 1 times [2024-06-27 23:16:26,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:16:26,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331332713] [2024-06-27 23:16:26,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:16:26,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:16:26,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:16:29,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:16:29,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:16:29,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331332713] [2024-06-27 23:16:29,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331332713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:16:29,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:16:29,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:16:29,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907016936] [2024-06-27 23:16:29,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:16:29,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:16:29,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:16:29,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:16:29,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:16:29,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-27 23:16:29,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:29,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:16:29,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-27 23:16:29,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:16:29,787 INFO L124 PetriNetUnfolderBase]: 1632/2543 cut-off events. [2024-06-27 23:16:29,787 INFO L125 PetriNetUnfolderBase]: For 2668/2668 co-relation queries the response was YES. [2024-06-27 23:16:29,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7020 conditions, 2543 events. 1632/2543 cut-off events. For 2668/2668 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12833 event pairs, 582 based on Foata normal form. 6/2537 useless extension candidates. Maximal degree in co-relation 7004. Up to 2348 conditions per place. [2024-06-27 23:16:29,799 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 58 selfloop transitions, 15 changer transitions 0/80 dead transitions. [2024-06-27 23:16:29,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 80 transitions, 436 flow [2024-06-27 23:16:29,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:16:29,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:16:29,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 23:16:29,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548172757475083 [2024-06-27 23:16:29,801 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 198 flow. Second operand 7 states and 167 transitions. [2024-06-27 23:16:29,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 80 transitions, 436 flow [2024-06-27 23:16:29,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 80 transitions, 408 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 23:16:29,806 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 219 flow [2024-06-27 23:16:29,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=219, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-27 23:16:29,808 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 11 predicate places. [2024-06-27 23:16:29,808 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 219 flow [2024-06-27 23:16:29,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:29,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:16:29,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:16:29,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 23:16:29,809 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)] === [2024-06-27 23:16:29,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:16:29,809 INFO L85 PathProgramCache]: Analyzing trace with hash 40153126, now seen corresponding path program 1 times [2024-06-27 23:16:29,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:16:29,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905033162] [2024-06-27 23:16:29,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:16:29,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:16:29,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:16:31,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:16:31,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:16:31,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905033162] [2024-06-27 23:16:31,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905033162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:16:31,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:16:31,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:16:31,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637083980] [2024-06-27 23:16:31,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:16:31,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:16:31,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:16:31,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:16:31,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:16:31,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:16:31,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 219 flow. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:31,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:16:31,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:16:31,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:16:32,167 INFO L124 PetriNetUnfolderBase]: 1627/2523 cut-off events. [2024-06-27 23:16:32,168 INFO L125 PetriNetUnfolderBase]: For 4271/4271 co-relation queries the response was YES. [2024-06-27 23:16:32,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7431 conditions, 2523 events. 1627/2523 cut-off events. For 4271/4271 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12714 event pairs, 963 based on Foata normal form. 2/2499 useless extension candidates. Maximal degree in co-relation 7413. Up to 2407 conditions per place. [2024-06-27 23:16:32,186 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 46 selfloop transitions, 10 changer transitions 0/62 dead transitions. [2024-06-27 23:16:32,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 62 transitions, 384 flow [2024-06-27 23:16:32,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:16:32,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:16:32,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2024-06-27 23:16:32,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744186046511628 [2024-06-27 23:16:32,189 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 219 flow. Second operand 5 states and 102 transitions. [2024-06-27 23:16:32,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 62 transitions, 384 flow [2024-06-27 23:16:32,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 62 transitions, 343 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 23:16:32,195 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 244 flow [2024-06-27 23:16:32,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=244, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2024-06-27 23:16:32,197 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2024-06-27 23:16:32,197 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 244 flow [2024-06-27 23:16:32,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:32,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:16:32,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:16:32,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 23:16:32,199 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:16:32,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:16:32,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1244748280, now seen corresponding path program 1 times [2024-06-27 23:16:32,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:16:32,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764932794] [2024-06-27 23:16:32,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:16:32,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:16:32,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:16:34,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:16:34,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:16:34,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764932794] [2024-06-27 23:16:34,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764932794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:16:34,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:16:34,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:16:34,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135018021] [2024-06-27 23:16:34,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:16:34,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:16:34,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:16:34,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:16:34,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:16:34,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:16:34,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 244 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:34,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:16:34,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:16:34,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:16:35,307 INFO L124 PetriNetUnfolderBase]: 1918/2955 cut-off events. [2024-06-27 23:16:35,307 INFO L125 PetriNetUnfolderBase]: For 6509/6509 co-relation queries the response was YES. [2024-06-27 23:16:35,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9198 conditions, 2955 events. 1918/2955 cut-off events. For 6509/6509 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14695 event pairs, 1144 based on Foata normal form. 2/2943 useless extension candidates. Maximal degree in co-relation 9177. Up to 2819 conditions per place. [2024-06-27 23:16:35,332 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 51 selfloop transitions, 13 changer transitions 0/69 dead transitions. [2024-06-27 23:16:35,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 69 transitions, 428 flow [2024-06-27 23:16:35,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:16:35,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:16:35,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-27 23:16:35,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44573643410852715 [2024-06-27 23:16:35,334 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 244 flow. Second operand 6 states and 115 transitions. [2024-06-27 23:16:35,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 69 transitions, 428 flow [2024-06-27 23:16:35,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 69 transitions, 406 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-27 23:16:35,339 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 284 flow [2024-06-27 23:16:35,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=284, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2024-06-27 23:16:35,341 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-27 23:16:35,342 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 284 flow [2024-06-27 23:16:35,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:35,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:16:35,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:16:35,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 23:16:35,342 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:16:35,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:16:35,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1553798887, now seen corresponding path program 1 times [2024-06-27 23:16:35,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:16:35,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624015167] [2024-06-27 23:16:35,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:16:35,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:16:35,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:16:37,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:16:37,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:16:37,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624015167] [2024-06-27 23:16:37,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624015167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:16:37,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:16:37,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:16:37,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541024703] [2024-06-27 23:16:37,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:16:37,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:16:37,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:16:37,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:16:37,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:16:37,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:16:37,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 284 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:37,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:16:37,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:16:37,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:16:37,939 INFO L124 PetriNetUnfolderBase]: 1871/2915 cut-off events. [2024-06-27 23:16:37,940 INFO L125 PetriNetUnfolderBase]: For 9565/9569 co-relation queries the response was YES. [2024-06-27 23:16:37,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9819 conditions, 2915 events. 1871/2915 cut-off events. For 9565/9569 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14911 event pairs, 986 based on Foata normal form. 6/2873 useless extension candidates. Maximal degree in co-relation 9795. Up to 2687 conditions per place. [2024-06-27 23:16:37,953 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 62 selfloop transitions, 23 changer transitions 0/92 dead transitions. [2024-06-27 23:16:37,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 92 transitions, 637 flow [2024-06-27 23:16:37,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:16:37,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:16:37,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-27 23:16:37,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5271317829457365 [2024-06-27 23:16:37,955 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 284 flow. Second operand 6 states and 136 transitions. [2024-06-27 23:16:37,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 92 transitions, 637 flow [2024-06-27 23:16:37,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 92 transitions, 605 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 23:16:37,960 INFO L231 Difference]: Finished difference. Result has 64 places, 69 transitions, 423 flow [2024-06-27 23:16:37,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=423, PETRI_PLACES=64, PETRI_TRANSITIONS=69} [2024-06-27 23:16:37,961 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 20 predicate places. [2024-06-27 23:16:37,961 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 69 transitions, 423 flow [2024-06-27 23:16:37,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:37,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:16:37,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:16:37,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 23:16:37,962 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:16:37,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:16:37,962 INFO L85 PathProgramCache]: Analyzing trace with hash 123683205, now seen corresponding path program 2 times [2024-06-27 23:16:37,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:16:37,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256410591] [2024-06-27 23:16:37,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:16:37,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:16:37,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:16:39,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:16:39,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:16:39,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256410591] [2024-06-27 23:16:39,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256410591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:16:39,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:16:39,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:16:39,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441317349] [2024-06-27 23:16:39,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:16:39,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:16:39,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:16:39,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:16:39,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:16:39,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:16:39,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 69 transitions, 423 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:39,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:16:39,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:16:39,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:16:40,431 INFO L124 PetriNetUnfolderBase]: 1905/2975 cut-off events. [2024-06-27 23:16:40,431 INFO L125 PetriNetUnfolderBase]: For 12770/12774 co-relation queries the response was YES. [2024-06-27 23:16:40,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10933 conditions, 2975 events. 1905/2975 cut-off events. For 12770/12774 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15217 event pairs, 1063 based on Foata normal form. 7/2927 useless extension candidates. Maximal degree in co-relation 10907. Up to 2746 conditions per place. [2024-06-27 23:16:40,449 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 61 selfloop transitions, 30 changer transitions 0/98 dead transitions. [2024-06-27 23:16:40,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 98 transitions, 807 flow [2024-06-27 23:16:40,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:16:40,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:16:40,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-06-27 23:16:40,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4844961240310077 [2024-06-27 23:16:40,451 INFO L175 Difference]: Start difference. First operand has 64 places, 69 transitions, 423 flow. Second operand 6 states and 125 transitions. [2024-06-27 23:16:40,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 98 transitions, 807 flow [2024-06-27 23:16:40,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 98 transitions, 764 flow, removed 18 selfloop flow, removed 1 redundant places. [2024-06-27 23:16:40,459 INFO L231 Difference]: Finished difference. Result has 70 places, 82 transitions, 609 flow [2024-06-27 23:16:40,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=609, PETRI_PLACES=70, PETRI_TRANSITIONS=82} [2024-06-27 23:16:40,459 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 26 predicate places. [2024-06-27 23:16:40,460 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 82 transitions, 609 flow [2024-06-27 23:16:40,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:40,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:16:40,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:16:40,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 23:16:40,460 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:16:40,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:16:40,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1191750055, now seen corresponding path program 3 times [2024-06-27 23:16:40,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:16:40,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017154037] [2024-06-27 23:16:40,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:16:40,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:16:40,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:16:41,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:16:41,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:16:41,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017154037] [2024-06-27 23:16:41,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017154037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:16:41,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:16:41,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:16:41,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786395116] [2024-06-27 23:16:41,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:16:41,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:16:41,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:16:41,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:16:41,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:16:41,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:16:41,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 82 transitions, 609 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:41,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:16:41,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:16:41,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:16:42,509 INFO L124 PetriNetUnfolderBase]: 1897/2963 cut-off events. [2024-06-27 23:16:42,509 INFO L125 PetriNetUnfolderBase]: For 14719/14719 co-relation queries the response was YES. [2024-06-27 23:16:42,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11169 conditions, 2963 events. 1897/2963 cut-off events. For 14719/14719 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15107 event pairs, 1061 based on Foata normal form. 3/2911 useless extension candidates. Maximal degree in co-relation 11139. Up to 2767 conditions per place. [2024-06-27 23:16:42,526 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 73 selfloop transitions, 16 changer transitions 0/96 dead transitions. [2024-06-27 23:16:42,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 96 transitions, 831 flow [2024-06-27 23:16:42,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:16:42,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:16:42,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-27 23:16:42,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 23:16:42,528 INFO L175 Difference]: Start difference. First operand has 70 places, 82 transitions, 609 flow. Second operand 6 states and 120 transitions. [2024-06-27 23:16:42,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 96 transitions, 831 flow [2024-06-27 23:16:42,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 96 transitions, 740 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-27 23:16:42,538 INFO L231 Difference]: Finished difference. Result has 73 places, 82 transitions, 561 flow [2024-06-27 23:16:42,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=561, PETRI_PLACES=73, PETRI_TRANSITIONS=82} [2024-06-27 23:16:42,539 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 29 predicate places. [2024-06-27 23:16:42,539 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 82 transitions, 561 flow [2024-06-27 23:16:42,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:42,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:16:42,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:16:42,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 23:16:42,540 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:16:42,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:16:42,540 INFO L85 PathProgramCache]: Analyzing trace with hash -67507579, now seen corresponding path program 1 times [2024-06-27 23:16:42,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:16:42,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521515418] [2024-06-27 23:16:42,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:16:42,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:16:42,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:16:45,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:16:45,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:16:45,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521515418] [2024-06-27 23:16:45,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521515418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:16:45,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:16:45,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:16:45,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910397229] [2024-06-27 23:16:45,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:16:45,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:16:45,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:16:45,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:16:45,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:16:45,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:16:45,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 82 transitions, 561 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:45,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:16:45,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:16:45,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:16:46,242 INFO L124 PetriNetUnfolderBase]: 1970/3033 cut-off events. [2024-06-27 23:16:46,242 INFO L125 PetriNetUnfolderBase]: For 15784/15784 co-relation queries the response was YES. [2024-06-27 23:16:46,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11454 conditions, 3033 events. 1970/3033 cut-off events. For 15784/15784 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15034 event pairs, 1104 based on Foata normal form. 2/3023 useless extension candidates. Maximal degree in co-relation 11423. Up to 2886 conditions per place. [2024-06-27 23:16:46,257 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 82 selfloop transitions, 16 changer transitions 0/103 dead transitions. [2024-06-27 23:16:46,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 103 transitions, 837 flow [2024-06-27 23:16:46,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:16:46,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:16:46,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 23:16:46,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-27 23:16:46,259 INFO L175 Difference]: Start difference. First operand has 73 places, 82 transitions, 561 flow. Second operand 7 states and 132 transitions. [2024-06-27 23:16:46,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 103 transitions, 837 flow [2024-06-27 23:16:46,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 103 transitions, 792 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 23:16:46,269 INFO L231 Difference]: Finished difference. Result has 75 places, 85 transitions, 590 flow [2024-06-27 23:16:46,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=590, PETRI_PLACES=75, PETRI_TRANSITIONS=85} [2024-06-27 23:16:46,270 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 31 predicate places. [2024-06-27 23:16:46,270 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 85 transitions, 590 flow [2024-06-27 23:16:46,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:46,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:16:46,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:16:46,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 23:16:46,270 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:16:46,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:16:46,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1597934695, now seen corresponding path program 1 times [2024-06-27 23:16:46,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:16:46,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723061967] [2024-06-27 23:16:46,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:16:46,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:16:46,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:16:47,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:16:47,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:16:47,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723061967] [2024-06-27 23:16:47,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723061967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:16:47,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:16:47,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:16:47,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042000060] [2024-06-27 23:16:47,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:16:47,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:16:47,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:16:47,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:16:47,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:16:48,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:16:48,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 85 transitions, 590 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:48,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:16:48,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:16:48,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:16:48,959 INFO L124 PetriNetUnfolderBase]: 1925/3002 cut-off events. [2024-06-27 23:16:48,959 INFO L125 PetriNetUnfolderBase]: For 20460/20465 co-relation queries the response was YES. [2024-06-27 23:16:48,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12184 conditions, 3002 events. 1925/3002 cut-off events. For 20460/20465 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15391 event pairs, 928 based on Foata normal form. 4/2958 useless extension candidates. Maximal degree in co-relation 12152. Up to 2750 conditions per place. [2024-06-27 23:16:48,977 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 94 selfloop transitions, 34 changer transitions 0/135 dead transitions. [2024-06-27 23:16:48,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 135 transitions, 1122 flow [2024-06-27 23:16:48,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:16:48,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:16:48,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-27 23:16:48,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627906976744186 [2024-06-27 23:16:48,979 INFO L175 Difference]: Start difference. First operand has 75 places, 85 transitions, 590 flow. Second operand 10 states and 199 transitions. [2024-06-27 23:16:48,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 135 transitions, 1122 flow [2024-06-27 23:16:48,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 135 transitions, 1080 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 23:16:48,990 INFO L231 Difference]: Finished difference. Result has 82 places, 100 transitions, 762 flow [2024-06-27 23:16:48,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=762, PETRI_PLACES=82, PETRI_TRANSITIONS=100} [2024-06-27 23:16:48,991 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 38 predicate places. [2024-06-27 23:16:48,991 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 100 transitions, 762 flow [2024-06-27 23:16:48,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:48,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:16:48,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:16:48,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 23:16:48,992 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:16:48,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:16:48,992 INFO L85 PathProgramCache]: Analyzing trace with hash -963865493, now seen corresponding path program 2 times [2024-06-27 23:16:48,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:16:48,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85054317] [2024-06-27 23:16:48,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:16:48,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:16:49,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:16:50,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:16:50,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:16:50,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85054317] [2024-06-27 23:16:50,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85054317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:16:50,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:16:50,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:16:50,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499304116] [2024-06-27 23:16:50,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:16:50,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:16:50,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:16:50,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:16:50,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:16:51,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:16:51,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 100 transitions, 762 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:51,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:16:51,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:16:51,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:16:51,893 INFO L124 PetriNetUnfolderBase]: 1961/3076 cut-off events. [2024-06-27 23:16:51,893 INFO L125 PetriNetUnfolderBase]: For 24661/24664 co-relation queries the response was YES. [2024-06-27 23:16:51,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13298 conditions, 3076 events. 1961/3076 cut-off events. For 24661/24664 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 15804 event pairs, 874 based on Foata normal form. 5/3048 useless extension candidates. Maximal degree in co-relation 13263. Up to 2806 conditions per place. [2024-06-27 23:16:51,910 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 95 selfloop transitions, 39 changer transitions 0/141 dead transitions. [2024-06-27 23:16:51,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 141 transitions, 1279 flow [2024-06-27 23:16:51,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:16:51,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:16:51,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-27 23:16:51,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47093023255813954 [2024-06-27 23:16:51,912 INFO L175 Difference]: Start difference. First operand has 82 places, 100 transitions, 762 flow. Second operand 8 states and 162 transitions. [2024-06-27 23:16:51,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 141 transitions, 1279 flow [2024-06-27 23:16:51,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 141 transitions, 1172 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-27 23:16:51,928 INFO L231 Difference]: Finished difference. Result has 87 places, 117 transitions, 949 flow [2024-06-27 23:16:51,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=695, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=949, PETRI_PLACES=87, PETRI_TRANSITIONS=117} [2024-06-27 23:16:51,928 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 43 predicate places. [2024-06-27 23:16:51,929 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 117 transitions, 949 flow [2024-06-27 23:16:51,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:51,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:16:51,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:16:51,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 23:16:51,929 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:16:51,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:16:51,930 INFO L85 PathProgramCache]: Analyzing trace with hash -924421217, now seen corresponding path program 1 times [2024-06-27 23:16:51,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:16:51,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155804976] [2024-06-27 23:16:51,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:16:51,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:16:51,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:16:53,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:16:53,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:16:53,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155804976] [2024-06-27 23:16:53,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155804976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:16:53,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:16:53,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:16:53,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519408756] [2024-06-27 23:16:53,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:16:53,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:16:53,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:16:53,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:16:53,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:16:53,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:16:53,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 117 transitions, 949 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:53,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:16:53,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:16:53,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:16:54,934 INFO L124 PetriNetUnfolderBase]: 2084/3201 cut-off events. [2024-06-27 23:16:54,934 INFO L125 PetriNetUnfolderBase]: For 27875/27882 co-relation queries the response was YES. [2024-06-27 23:16:54,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14066 conditions, 3201 events. 2084/3201 cut-off events. For 27875/27882 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15962 event pairs, 1005 based on Foata normal form. 8/3208 useless extension candidates. Maximal degree in co-relation 14028. Up to 2960 conditions per place. [2024-06-27 23:16:54,952 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 103 selfloop transitions, 46 changer transitions 0/154 dead transitions. [2024-06-27 23:16:54,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 154 transitions, 1505 flow [2024-06-27 23:16:54,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:16:54,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:16:54,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 23:16:54,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-27 23:16:54,953 INFO L175 Difference]: Start difference. First operand has 87 places, 117 transitions, 949 flow. Second operand 8 states and 161 transitions. [2024-06-27 23:16:54,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 154 transitions, 1505 flow [2024-06-27 23:16:54,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 154 transitions, 1432 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-27 23:16:54,978 INFO L231 Difference]: Finished difference. Result has 93 places, 127 transitions, 1095 flow [2024-06-27 23:16:54,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=876, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1095, PETRI_PLACES=93, PETRI_TRANSITIONS=127} [2024-06-27 23:16:54,978 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 49 predicate places. [2024-06-27 23:16:54,979 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 127 transitions, 1095 flow [2024-06-27 23:16:54,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:54,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:16:54,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:16:54,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 23:16:54,979 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:16:54,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:16:54,980 INFO L85 PathProgramCache]: Analyzing trace with hash -924421403, now seen corresponding path program 3 times [2024-06-27 23:16:54,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:16:54,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565443557] [2024-06-27 23:16:54,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:16:54,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:16:54,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:16:56,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:16:56,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:16:56,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565443557] [2024-06-27 23:16:56,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565443557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:16:56,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:16:56,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:16:56,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226373802] [2024-06-27 23:16:56,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:16:56,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:16:56,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:16:56,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:16:56,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:16:56,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:16:56,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 127 transitions, 1095 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:56,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:16:56,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:16:56,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:16:57,888 INFO L124 PetriNetUnfolderBase]: 2006/3143 cut-off events. [2024-06-27 23:16:57,889 INFO L125 PetriNetUnfolderBase]: For 32995/32997 co-relation queries the response was YES. [2024-06-27 23:16:57,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14665 conditions, 3143 events. 2006/3143 cut-off events. For 32995/32997 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 16093 event pairs, 869 based on Foata normal form. 4/3132 useless extension candidates. Maximal degree in co-relation 14625. Up to 2752 conditions per place. [2024-06-27 23:16:57,907 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 83 selfloop transitions, 72 changer transitions 0/165 dead transitions. [2024-06-27 23:16:57,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 165 transitions, 1708 flow [2024-06-27 23:16:57,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:16:57,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:16:57,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-27 23:16:57,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-27 23:16:57,917 INFO L175 Difference]: Start difference. First operand has 93 places, 127 transitions, 1095 flow. Second operand 8 states and 168 transitions. [2024-06-27 23:16:57,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 165 transitions, 1708 flow [2024-06-27 23:16:57,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 165 transitions, 1648 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 23:16:57,944 INFO L231 Difference]: Finished difference. Result has 98 places, 138 transitions, 1344 flow [2024-06-27 23:16:57,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1035, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1344, PETRI_PLACES=98, PETRI_TRANSITIONS=138} [2024-06-27 23:16:57,944 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 54 predicate places. [2024-06-27 23:16:57,944 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 138 transitions, 1344 flow [2024-06-27 23:16:57,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:57,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:16:57,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:16:57,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 23:16:57,945 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:16:57,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:16:57,945 INFO L85 PathProgramCache]: Analyzing trace with hash 2024736029, now seen corresponding path program 4 times [2024-06-27 23:16:57,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:16:57,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291671107] [2024-06-27 23:16:57,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:16:57,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:16:57,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:16:59,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:16:59,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:16:59,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291671107] [2024-06-27 23:16:59,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291671107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:16:59,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:16:59,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:16:59,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156719982] [2024-06-27 23:16:59,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:16:59,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:16:59,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:16:59,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:16:59,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:16:59,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:16:59,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 138 transitions, 1344 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:59,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:16:59,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:16:59,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:00,389 INFO L124 PetriNetUnfolderBase]: 2036/3171 cut-off events. [2024-06-27 23:17:00,390 INFO L125 PetriNetUnfolderBase]: For 40516/40517 co-relation queries the response was YES. [2024-06-27 23:17:00,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15801 conditions, 3171 events. 2036/3171 cut-off events. For 40516/40517 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 16237 event pairs, 1000 based on Foata normal form. 3/3139 useless extension candidates. Maximal degree in co-relation 15759. Up to 2924 conditions per place. [2024-06-27 23:17:00,408 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 124 selfloop transitions, 34 changer transitions 0/168 dead transitions. [2024-06-27 23:17:00,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 168 transitions, 1844 flow [2024-06-27 23:17:00,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:17:00,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:17:00,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-27 23:17:00,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 23:17:00,409 INFO L175 Difference]: Start difference. First operand has 98 places, 138 transitions, 1344 flow. Second operand 7 states and 140 transitions. [2024-06-27 23:17:00,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 168 transitions, 1844 flow [2024-06-27 23:17:00,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 168 transitions, 1738 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-27 23:17:00,441 INFO L231 Difference]: Finished difference. Result has 103 places, 151 transitions, 1488 flow [2024-06-27 23:17:00,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1246, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1488, PETRI_PLACES=103, PETRI_TRANSITIONS=151} [2024-06-27 23:17:00,442 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 59 predicate places. [2024-06-27 23:17:00,442 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 151 transitions, 1488 flow [2024-06-27 23:17:00,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:00,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:00,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:00,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 23:17:00,442 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:17:00,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:00,443 INFO L85 PathProgramCache]: Analyzing trace with hash 2024855999, now seen corresponding path program 5 times [2024-06-27 23:17:00,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:00,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208034044] [2024-06-27 23:17:00,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:00,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:00,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:02,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:02,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:02,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208034044] [2024-06-27 23:17:02,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208034044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:02,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:02,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:17:02,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758028241] [2024-06-27 23:17:02,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:02,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:17:02,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:02,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:17:02,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:17:02,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:17:02,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 151 transitions, 1488 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:02,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:02,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:17:02,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:02,816 INFO L124 PetriNetUnfolderBase]: 2061/3208 cut-off events. [2024-06-27 23:17:02,816 INFO L125 PetriNetUnfolderBase]: For 44833/44836 co-relation queries the response was YES. [2024-06-27 23:17:02,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16411 conditions, 3208 events. 2061/3208 cut-off events. For 44833/44836 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 16437 event pairs, 1006 based on Foata normal form. 5/3178 useless extension candidates. Maximal degree in co-relation 16366. Up to 2888 conditions per place. [2024-06-27 23:17:02,836 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 108 selfloop transitions, 62 changer transitions 0/180 dead transitions. [2024-06-27 23:17:02,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 180 transitions, 2074 flow [2024-06-27 23:17:02,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:17:02,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:17:02,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 23:17:02,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-27 23:17:02,838 INFO L175 Difference]: Start difference. First operand has 103 places, 151 transitions, 1488 flow. Second operand 8 states and 156 transitions. [2024-06-27 23:17:02,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 180 transitions, 2074 flow [2024-06-27 23:17:02,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 180 transitions, 2025 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 23:17:02,862 INFO L231 Difference]: Finished difference. Result has 107 places, 160 transitions, 1687 flow [2024-06-27 23:17:02,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1439, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1687, PETRI_PLACES=107, PETRI_TRANSITIONS=160} [2024-06-27 23:17:02,863 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 63 predicate places. [2024-06-27 23:17:02,863 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 160 transitions, 1687 flow [2024-06-27 23:17:02,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:02,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:02,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:02,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 23:17:02,864 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:17:02,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:02,864 INFO L85 PathProgramCache]: Analyzing trace with hash 2024856185, now seen corresponding path program 2 times [2024-06-27 23:17:02,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:02,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647913838] [2024-06-27 23:17:02,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:02,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:02,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:04,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:04,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:04,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647913838] [2024-06-27 23:17:04,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647913838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:04,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:04,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:17:04,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723965559] [2024-06-27 23:17:04,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:04,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:17:04,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:04,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:17:04,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:17:04,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:17:04,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 160 transitions, 1687 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:04,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:04,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:17:04,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:05,429 INFO L124 PetriNetUnfolderBase]: 2175/3348 cut-off events. [2024-06-27 23:17:05,429 INFO L125 PetriNetUnfolderBase]: For 47871/47875 co-relation queries the response was YES. [2024-06-27 23:17:05,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17199 conditions, 3348 events. 2175/3348 cut-off events. For 47871/47875 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16813 event pairs, 1079 based on Foata normal form. 7/3346 useless extension candidates. Maximal degree in co-relation 17153. Up to 3110 conditions per place. [2024-06-27 23:17:05,451 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 139 selfloop transitions, 45 changer transitions 0/189 dead transitions. [2024-06-27 23:17:05,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 189 transitions, 2283 flow [2024-06-27 23:17:05,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:17:05,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:17:05,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-27 23:17:05,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179401993355484 [2024-06-27 23:17:05,452 INFO L175 Difference]: Start difference. First operand has 107 places, 160 transitions, 1687 flow. Second operand 7 states and 139 transitions. [2024-06-27 23:17:05,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 189 transitions, 2283 flow [2024-06-27 23:17:05,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 189 transitions, 2136 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-27 23:17:05,485 INFO L231 Difference]: Finished difference. Result has 109 places, 169 transitions, 1738 flow [2024-06-27 23:17:05,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1540, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1738, PETRI_PLACES=109, PETRI_TRANSITIONS=169} [2024-06-27 23:17:05,485 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 65 predicate places. [2024-06-27 23:17:05,485 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 169 transitions, 1738 flow [2024-06-27 23:17:05,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:05,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:05,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:05,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 23:17:05,486 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:17:05,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:05,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1710452585, now seen corresponding path program 3 times [2024-06-27 23:17:05,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:05,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163602882] [2024-06-27 23:17:05,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:05,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:05,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:07,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:07,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:07,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163602882] [2024-06-27 23:17:07,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163602882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:07,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:07,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:17:07,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143720661] [2024-06-27 23:17:07,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:07,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:17:07,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:07,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:17:07,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:17:07,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:17:07,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 169 transitions, 1738 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:07,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:07,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:17:07,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:07,822 INFO L124 PetriNetUnfolderBase]: 2193/3371 cut-off events. [2024-06-27 23:17:07,822 INFO L125 PetriNetUnfolderBase]: For 52437/52437 co-relation queries the response was YES. [2024-06-27 23:17:07,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17569 conditions, 3371 events. 2193/3371 cut-off events. For 52437/52437 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16834 event pairs, 1079 based on Foata normal form. 3/3365 useless extension candidates. Maximal degree in co-relation 17522. Up to 3178 conditions per place. [2024-06-27 23:17:07,843 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 161 selfloop transitions, 30 changer transitions 0/196 dead transitions. [2024-06-27 23:17:07,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 196 transitions, 2364 flow [2024-06-27 23:17:07,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:17:07,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:17:07,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 23:17:07,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-27 23:17:07,845 INFO L175 Difference]: Start difference. First operand has 109 places, 169 transitions, 1738 flow. Second operand 7 states and 136 transitions. [2024-06-27 23:17:07,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 196 transitions, 2364 flow [2024-06-27 23:17:07,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 196 transitions, 2255 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 23:17:07,884 INFO L231 Difference]: Finished difference. Result has 112 places, 175 transitions, 1784 flow [2024-06-27 23:17:07,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1635, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1784, PETRI_PLACES=112, PETRI_TRANSITIONS=175} [2024-06-27 23:17:07,884 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 68 predicate places. [2024-06-27 23:17:07,884 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 175 transitions, 1784 flow [2024-06-27 23:17:07,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:07,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:07,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:07,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 23:17:07,885 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:17:07,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:07,885 INFO L85 PathProgramCache]: Analyzing trace with hash -2092742441, now seen corresponding path program 4 times [2024-06-27 23:17:07,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:07,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669364465] [2024-06-27 23:17:07,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:07,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:07,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:09,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:09,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:09,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669364465] [2024-06-27 23:17:09,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669364465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:09,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:09,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:17:09,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962272959] [2024-06-27 23:17:09,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:09,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:17:09,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:09,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:17:09,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:17:09,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:17:09,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 175 transitions, 1784 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:09,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:09,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:17:09,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:10,052 INFO L124 PetriNetUnfolderBase]: 2185/3360 cut-off events. [2024-06-27 23:17:10,053 INFO L125 PetriNetUnfolderBase]: For 56616/56616 co-relation queries the response was YES. [2024-06-27 23:17:10,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17656 conditions, 3360 events. 2185/3360 cut-off events. For 56616/56616 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16765 event pairs, 1079 based on Foata normal form. 3/3354 useless extension candidates. Maximal degree in co-relation 17608. Up to 3195 conditions per place. [2024-06-27 23:17:10,077 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 169 selfloop transitions, 19 changer transitions 0/193 dead transitions. [2024-06-27 23:17:10,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 193 transitions, 2241 flow [2024-06-27 23:17:10,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:17:10,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:17:10,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 23:17:10,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-27 23:17:10,078 INFO L175 Difference]: Start difference. First operand has 112 places, 175 transitions, 1784 flow. Second operand 7 states and 132 transitions. [2024-06-27 23:17:10,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 193 transitions, 2241 flow [2024-06-27 23:17:10,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 193 transitions, 2098 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-27 23:17:10,128 INFO L231 Difference]: Finished difference. Result has 114 places, 175 transitions, 1690 flow [2024-06-27 23:17:10,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1641, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1690, PETRI_PLACES=114, PETRI_TRANSITIONS=175} [2024-06-27 23:17:10,129 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 70 predicate places. [2024-06-27 23:17:10,129 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 175 transitions, 1690 flow [2024-06-27 23:17:10,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:10,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:10,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:10,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 23:17:10,130 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:17:10,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:10,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1076685883, now seen corresponding path program 6 times [2024-06-27 23:17:10,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:10,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134031105] [2024-06-27 23:17:10,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:10,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:10,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:11,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:11,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:11,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134031105] [2024-06-27 23:17:11,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134031105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:11,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:11,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:17:11,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487727962] [2024-06-27 23:17:11,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:11,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:17:11,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:11,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:17:11,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:17:11,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:17:11,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 175 transitions, 1690 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:11,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:11,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:17:11,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:12,369 INFO L124 PetriNetUnfolderBase]: 2084/3245 cut-off events. [2024-06-27 23:17:12,369 INFO L125 PetriNetUnfolderBase]: For 63309/63314 co-relation queries the response was YES. [2024-06-27 23:17:12,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17549 conditions, 3245 events. 2084/3245 cut-off events. For 63309/63314 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 16617 event pairs, 1012 based on Foata normal form. 3/3213 useless extension candidates. Maximal degree in co-relation 17500. Up to 3002 conditions per place. [2024-06-27 23:17:12,391 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 156 selfloop transitions, 22 changer transitions 0/193 dead transitions. [2024-06-27 23:17:12,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 193 transitions, 2134 flow [2024-06-27 23:17:12,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:17:12,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:17:12,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-27 23:17:12,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-27 23:17:12,393 INFO L175 Difference]: Start difference. First operand has 114 places, 175 transitions, 1690 flow. Second operand 7 states and 138 transitions. [2024-06-27 23:17:12,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 193 transitions, 2134 flow [2024-06-27 23:17:12,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 193 transitions, 2035 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-27 23:17:12,432 INFO L231 Difference]: Finished difference. Result has 115 places, 175 transitions, 1647 flow [2024-06-27 23:17:12,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1591, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1647, PETRI_PLACES=115, PETRI_TRANSITIONS=175} [2024-06-27 23:17:12,433 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 71 predicate places. [2024-06-27 23:17:12,433 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 175 transitions, 1647 flow [2024-06-27 23:17:12,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:12,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:12,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:12,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 23:17:12,434 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:17:12,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:12,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1358766179, now seen corresponding path program 1 times [2024-06-27 23:17:12,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:12,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476386505] [2024-06-27 23:17:12,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:12,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:12,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:14,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:14,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:14,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476386505] [2024-06-27 23:17:14,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476386505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:14,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:14,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:17:14,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745541535] [2024-06-27 23:17:14,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:14,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:17:14,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:14,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:17:14,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:17:14,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:17:14,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 175 transitions, 1647 flow. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:14,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:14,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:17:14,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:15,055 INFO L124 PetriNetUnfolderBase]: 2520/3860 cut-off events. [2024-06-27 23:17:15,055 INFO L125 PetriNetUnfolderBase]: For 86606/86630 co-relation queries the response was YES. [2024-06-27 23:17:15,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20825 conditions, 3860 events. 2520/3860 cut-off events. For 86606/86630 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 19657 event pairs, 1409 based on Foata normal form. 9/3838 useless extension candidates. Maximal degree in co-relation 20775. Up to 3672 conditions per place. [2024-06-27 23:17:15,083 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 143 selfloop transitions, 10 changer transitions 0/185 dead transitions. [2024-06-27 23:17:15,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 185 transitions, 2003 flow [2024-06-27 23:17:15,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:17:15,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:17:15,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-06-27 23:17:15,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372093023255814 [2024-06-27 23:17:15,085 INFO L175 Difference]: Start difference. First operand has 115 places, 175 transitions, 1647 flow. Second operand 5 states and 94 transitions. [2024-06-27 23:17:15,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 185 transitions, 2003 flow [2024-06-27 23:17:15,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 185 transitions, 1864 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 23:17:15,133 INFO L231 Difference]: Finished difference. Result has 113 places, 178 transitions, 1562 flow [2024-06-27 23:17:15,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1508, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1562, PETRI_PLACES=113, PETRI_TRANSITIONS=178} [2024-06-27 23:17:15,134 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 69 predicate places. [2024-06-27 23:17:15,134 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 178 transitions, 1562 flow [2024-06-27 23:17:15,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:15,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:15,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:15,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 23:17:15,134 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:17:15,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:15,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1994616230, now seen corresponding path program 1 times [2024-06-27 23:17:15,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:15,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393478530] [2024-06-27 23:17:15,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:15,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:15,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:16,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:16,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:16,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393478530] [2024-06-27 23:17:16,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393478530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:16,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:16,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:17:16,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791833227] [2024-06-27 23:17:16,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:16,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:17:16,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:16,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:17:16,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:17:16,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:17:16,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 178 transitions, 1562 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:16,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:16,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:17:16,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:17,861 INFO L124 PetriNetUnfolderBase]: 2298/3534 cut-off events. [2024-06-27 23:17:17,861 INFO L125 PetriNetUnfolderBase]: For 89106/89146 co-relation queries the response was YES. [2024-06-27 23:17:17,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20179 conditions, 3534 events. 2298/3534 cut-off events. For 89106/89146 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 18154 event pairs, 950 based on Foata normal form. 8/3478 useless extension candidates. Maximal degree in co-relation 20129. Up to 3099 conditions per place. [2024-06-27 23:17:17,886 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 136 selfloop transitions, 75 changer transitions 0/227 dead transitions. [2024-06-27 23:17:17,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 227 transitions, 2386 flow [2024-06-27 23:17:17,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:17:17,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:17:17,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-27 23:17:17,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744186046511628 [2024-06-27 23:17:17,888 INFO L175 Difference]: Start difference. First operand has 113 places, 178 transitions, 1562 flow. Second operand 10 states and 204 transitions. [2024-06-27 23:17:17,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 227 transitions, 2386 flow [2024-06-27 23:17:17,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 227 transitions, 2354 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 23:17:17,946 INFO L231 Difference]: Finished difference. Result has 122 places, 193 transitions, 1902 flow [2024-06-27 23:17:17,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1530, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1902, PETRI_PLACES=122, PETRI_TRANSITIONS=193} [2024-06-27 23:17:17,946 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 78 predicate places. [2024-06-27 23:17:17,946 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 193 transitions, 1902 flow [2024-06-27 23:17:17,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:17,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:17,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:17,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 23:17:17,947 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:17:17,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:17,947 INFO L85 PathProgramCache]: Analyzing trace with hash 2083731212, now seen corresponding path program 2 times [2024-06-27 23:17:17,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:17,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370726155] [2024-06-27 23:17:17,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:17,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:17,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:20,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:20,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:20,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370726155] [2024-06-27 23:17:20,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370726155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:20,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:20,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:17:20,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489590634] [2024-06-27 23:17:20,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:20,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:17:20,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:20,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:17:20,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:17:20,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:17:20,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 193 transitions, 1902 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:20,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:20,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:17:20,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:21,682 INFO L124 PetriNetUnfolderBase]: 2336/3612 cut-off events. [2024-06-27 23:17:21,683 INFO L125 PetriNetUnfolderBase]: For 98495/98527 co-relation queries the response was YES. [2024-06-27 23:17:21,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21664 conditions, 3612 events. 2336/3612 cut-off events. For 98495/98527 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 18684 event pairs, 952 based on Foata normal form. 9/3572 useless extension candidates. Maximal degree in co-relation 21611. Up to 3192 conditions per place. [2024-06-27 23:17:21,711 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 154 selfloop transitions, 85 changer transitions 0/255 dead transitions. [2024-06-27 23:17:21,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 255 transitions, 2923 flow [2024-06-27 23:17:21,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:17:21,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:17:21,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-27 23:17:21,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 23:17:21,714 INFO L175 Difference]: Start difference. First operand has 122 places, 193 transitions, 1902 flow. Second operand 11 states and 220 transitions. [2024-06-27 23:17:21,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 255 transitions, 2923 flow [2024-06-27 23:17:21,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 255 transitions, 2766 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-06-27 23:17:21,792 INFO L231 Difference]: Finished difference. Result has 130 places, 214 transitions, 2256 flow [2024-06-27 23:17:21,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1815, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2256, PETRI_PLACES=130, PETRI_TRANSITIONS=214} [2024-06-27 23:17:21,792 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 86 predicate places. [2024-06-27 23:17:21,792 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 214 transitions, 2256 flow [2024-06-27 23:17:21,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:21,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:21,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:21,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 23:17:21,793 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:17:21,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:21,793 INFO L85 PathProgramCache]: Analyzing trace with hash 2085075217, now seen corresponding path program 1 times [2024-06-27 23:17:21,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:21,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470572612] [2024-06-27 23:17:21,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:21,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:21,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:23,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:23,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:23,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470572612] [2024-06-27 23:17:23,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470572612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:23,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:23,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:17:23,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787468531] [2024-06-27 23:17:23,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:23,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:17:23,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:23,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:17:23,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:17:23,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:17:23,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 214 transitions, 2256 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:23,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:23,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:17:23,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:24,902 INFO L124 PetriNetUnfolderBase]: 2467/3765 cut-off events. [2024-06-27 23:17:24,902 INFO L125 PetriNetUnfolderBase]: For 98519/98542 co-relation queries the response was YES. [2024-06-27 23:17:24,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22484 conditions, 3765 events. 2467/3765 cut-off events. For 98519/98542 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 19055 event pairs, 996 based on Foata normal form. 4/3738 useless extension candidates. Maximal degree in co-relation 22429. Up to 3440 conditions per place. [2024-06-27 23:17:24,929 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 187 selfloop transitions, 69 changer transitions 0/262 dead transitions. [2024-06-27 23:17:24,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 262 transitions, 3192 flow [2024-06-27 23:17:24,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:17:24,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:17:24,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-27 23:17:24,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 23:17:24,931 INFO L175 Difference]: Start difference. First operand has 130 places, 214 transitions, 2256 flow. Second operand 11 states and 209 transitions. [2024-06-27 23:17:24,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 262 transitions, 3192 flow [2024-06-27 23:17:25,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 262 transitions, 3054 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-27 23:17:25,008 INFO L231 Difference]: Finished difference. Result has 135 places, 224 transitions, 2413 flow [2024-06-27 23:17:25,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2118, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2413, PETRI_PLACES=135, PETRI_TRANSITIONS=224} [2024-06-27 23:17:25,009 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 91 predicate places. [2024-06-27 23:17:25,009 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 224 transitions, 2413 flow [2024-06-27 23:17:25,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:25,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:25,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:25,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 23:17:25,010 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:17:25,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:25,010 INFO L85 PathProgramCache]: Analyzing trace with hash 2085070412, now seen corresponding path program 3 times [2024-06-27 23:17:25,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:25,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537256586] [2024-06-27 23:17:25,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:25,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:25,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:27,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:27,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:27,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537256586] [2024-06-27 23:17:27,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537256586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:27,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:27,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:17:27,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228990123] [2024-06-27 23:17:27,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:27,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:17:27,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:27,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:17:27,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:17:27,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:17:27,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 224 transitions, 2413 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:27,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:27,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:17:27,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:28,679 INFO L124 PetriNetUnfolderBase]: 2367/3670 cut-off events. [2024-06-27 23:17:28,679 INFO L125 PetriNetUnfolderBase]: For 109491/109526 co-relation queries the response was YES. [2024-06-27 23:17:28,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22996 conditions, 3670 events. 2367/3670 cut-off events. For 109491/109526 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 19137 event pairs, 937 based on Foata normal form. 5/3632 useless extension candidates. Maximal degree in co-relation 22938. Up to 3270 conditions per place. [2024-06-27 23:17:28,759 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 174 selfloop transitions, 69 changer transitions 0/262 dead transitions. [2024-06-27 23:17:28,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 262 transitions, 3106 flow [2024-06-27 23:17:28,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:17:28,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:17:28,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-27 23:17:28,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4720930232558139 [2024-06-27 23:17:28,761 INFO L175 Difference]: Start difference. First operand has 135 places, 224 transitions, 2413 flow. Second operand 10 states and 203 transitions. [2024-06-27 23:17:28,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 262 transitions, 3106 flow [2024-06-27 23:17:28,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 262 transitions, 2996 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 23:17:28,837 INFO L231 Difference]: Finished difference. Result has 139 places, 227 transitions, 2502 flow [2024-06-27 23:17:28,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2303, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2502, PETRI_PLACES=139, PETRI_TRANSITIONS=227} [2024-06-27 23:17:28,838 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 95 predicate places. [2024-06-27 23:17:28,838 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 227 transitions, 2502 flow [2024-06-27 23:17:28,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:28,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:28,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:28,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 23:17:28,839 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:17:28,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:28,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1407560928, now seen corresponding path program 4 times [2024-06-27 23:17:28,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:28,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941003796] [2024-06-27 23:17:28,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:28,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:28,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:31,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:31,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:31,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941003796] [2024-06-27 23:17:31,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941003796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:31,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:31,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:17:31,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264345928] [2024-06-27 23:17:31,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:31,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:17:31,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:31,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:17:31,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:17:31,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 23:17:31,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 227 transitions, 2502 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:31,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:31,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 23:17:31,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:32,859 INFO L124 PetriNetUnfolderBase]: 2425/3732 cut-off events. [2024-06-27 23:17:32,859 INFO L125 PetriNetUnfolderBase]: For 123996/124041 co-relation queries the response was YES. [2024-06-27 23:17:32,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24079 conditions, 3732 events. 2425/3732 cut-off events. For 123996/124041 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 19300 event pairs, 935 based on Foata normal form. 13/3687 useless extension candidates. Maximal degree in co-relation 24020. Up to 3233 conditions per place. [2024-06-27 23:17:32,891 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 146 selfloop transitions, 103 changer transitions 0/268 dead transitions. [2024-06-27 23:17:32,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 268 transitions, 3370 flow [2024-06-27 23:17:32,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:17:32,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:17:32,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-27 23:17:32,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5290697674418605 [2024-06-27 23:17:32,893 INFO L175 Difference]: Start difference. First operand has 139 places, 227 transitions, 2502 flow. Second operand 8 states and 182 transitions. [2024-06-27 23:17:32,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 268 transitions, 3370 flow [2024-06-27 23:17:32,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 268 transitions, 3205 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-27 23:17:32,978 INFO L231 Difference]: Finished difference. Result has 139 places, 233 transitions, 2652 flow [2024-06-27 23:17:32,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2337, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2652, PETRI_PLACES=139, PETRI_TRANSITIONS=233} [2024-06-27 23:17:32,978 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 95 predicate places. [2024-06-27 23:17:32,979 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 233 transitions, 2652 flow [2024-06-27 23:17:32,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:32,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:32,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:32,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 23:17:32,979 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:17:32,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:32,980 INFO L85 PathProgramCache]: Analyzing trace with hash 184942008, now seen corresponding path program 5 times [2024-06-27 23:17:32,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:32,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656408996] [2024-06-27 23:17:32,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:32,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:33,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:35,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:35,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:35,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656408996] [2024-06-27 23:17:35,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656408996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:35,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:35,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:17:35,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308993095] [2024-06-27 23:17:35,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:35,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:17:35,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:35,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:17:35,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:17:36,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:17:36,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 233 transitions, 2652 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:36,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:36,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:17:36,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:37,384 INFO L124 PetriNetUnfolderBase]: 2374/3681 cut-off events. [2024-06-27 23:17:37,384 INFO L125 PetriNetUnfolderBase]: For 127058/127082 co-relation queries the response was YES. [2024-06-27 23:17:37,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23966 conditions, 3681 events. 2374/3681 cut-off events. For 127058/127082 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 19116 event pairs, 937 based on Foata normal form. 6/3644 useless extension candidates. Maximal degree in co-relation 23906. Up to 3254 conditions per place. [2024-06-27 23:17:37,413 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 166 selfloop transitions, 74 changer transitions 0/259 dead transitions. [2024-06-27 23:17:37,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 259 transitions, 3271 flow [2024-06-27 23:17:37,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:17:37,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:17:37,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 23:17:37,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-27 23:17:37,415 INFO L175 Difference]: Start difference. First operand has 139 places, 233 transitions, 2652 flow. Second operand 8 states and 161 transitions. [2024-06-27 23:17:37,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 259 transitions, 3271 flow [2024-06-27 23:17:37,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 259 transitions, 3015 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-27 23:17:37,515 INFO L231 Difference]: Finished difference. Result has 142 places, 233 transitions, 2571 flow [2024-06-27 23:17:37,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2396, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2571, PETRI_PLACES=142, PETRI_TRANSITIONS=233} [2024-06-27 23:17:37,515 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 98 predicate places. [2024-06-27 23:17:37,515 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 233 transitions, 2571 flow [2024-06-27 23:17:37,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:37,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:37,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:37,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 23:17:37,516 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:17:37,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:37,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1438241162, now seen corresponding path program 1 times [2024-06-27 23:17:37,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:37,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288347862] [2024-06-27 23:17:37,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:37,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:37,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:40,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:40,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:40,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288347862] [2024-06-27 23:17:40,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288347862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:40,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:40,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:17:40,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170271690] [2024-06-27 23:17:40,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:40,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:17:40,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:40,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:17:40,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:17:40,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:17:40,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 233 transitions, 2571 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:40,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:40,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:17:40,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:41,413 INFO L124 PetriNetUnfolderBase]: 2511/3846 cut-off events. [2024-06-27 23:17:41,413 INFO L125 PetriNetUnfolderBase]: For 120788/120814 co-relation queries the response was YES. [2024-06-27 23:17:41,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24451 conditions, 3846 events. 2511/3846 cut-off events. For 120788/120814 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 19511 event pairs, 949 based on Foata normal form. 12/3837 useless extension candidates. Maximal degree in co-relation 24389. Up to 3529 conditions per place. [2024-06-27 23:17:41,445 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 211 selfloop transitions, 61 changer transitions 0/278 dead transitions. [2024-06-27 23:17:41,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 278 transitions, 3486 flow [2024-06-27 23:17:41,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:17:41,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:17:41,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-27 23:17:41,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2024-06-27 23:17:41,447 INFO L175 Difference]: Start difference. First operand has 142 places, 233 transitions, 2571 flow. Second operand 10 states and 191 transitions. [2024-06-27 23:17:41,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 278 transitions, 3486 flow [2024-06-27 23:17:41,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 278 transitions, 3311 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 23:17:41,541 INFO L231 Difference]: Finished difference. Result has 146 places, 245 transitions, 2697 flow [2024-06-27 23:17:41,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2400, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2697, PETRI_PLACES=146, PETRI_TRANSITIONS=245} [2024-06-27 23:17:41,541 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 102 predicate places. [2024-06-27 23:17:41,541 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 245 transitions, 2697 flow [2024-06-27 23:17:41,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:41,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:41,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:41,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 23:17:41,542 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:17:41,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:41,542 INFO L85 PathProgramCache]: Analyzing trace with hash 103543107, now seen corresponding path program 2 times [2024-06-27 23:17:41,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:41,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377860364] [2024-06-27 23:17:41,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:41,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:41,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:43,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:43,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:43,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377860364] [2024-06-27 23:17:43,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377860364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:43,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:43,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:17:43,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973107410] [2024-06-27 23:17:43,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:43,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:17:43,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:43,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:17:43,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:17:43,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:17:43,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 245 transitions, 2697 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:43,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:43,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:17:43,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:45,017 INFO L124 PetriNetUnfolderBase]: 2500/3828 cut-off events. [2024-06-27 23:17:45,017 INFO L125 PetriNetUnfolderBase]: For 120667/120693 co-relation queries the response was YES. [2024-06-27 23:17:45,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24645 conditions, 3828 events. 2500/3828 cut-off events. For 120667/120693 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 19392 event pairs, 949 based on Foata normal form. 13/3820 useless extension candidates. Maximal degree in co-relation 24581. Up to 3534 conditions per place. [2024-06-27 23:17:45,050 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 208 selfloop transitions, 58 changer transitions 0/272 dead transitions. [2024-06-27 23:17:45,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 272 transitions, 3344 flow [2024-06-27 23:17:45,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:17:45,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:17:45,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 23:17:45,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 23:17:45,052 INFO L175 Difference]: Start difference. First operand has 146 places, 245 transitions, 2697 flow. Second operand 9 states and 172 transitions. [2024-06-27 23:17:45,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 272 transitions, 3344 flow [2024-06-27 23:17:45,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 272 transitions, 3161 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-27 23:17:45,196 INFO L231 Difference]: Finished difference. Result has 148 places, 245 transitions, 2647 flow [2024-06-27 23:17:45,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2514, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2647, PETRI_PLACES=148, PETRI_TRANSITIONS=245} [2024-06-27 23:17:45,197 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 104 predicate places. [2024-06-27 23:17:45,197 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 245 transitions, 2647 flow [2024-06-27 23:17:45,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:45,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:45,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:45,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 23:17:45,198 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)] === [2024-06-27 23:17:45,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:45,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1326309897, now seen corresponding path program 3 times [2024-06-27 23:17:45,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:45,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453260667] [2024-06-27 23:17:45,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:45,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:45,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:47,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:47,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:47,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453260667] [2024-06-27 23:17:47,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453260667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:47,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:47,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:17:47,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880245783] [2024-06-27 23:17:47,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:47,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:17:47,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:47,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:17:47,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:17:47,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:17:47,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 245 transitions, 2647 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:47,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:47,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:17:47,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:48,686 INFO L124 PetriNetUnfolderBase]: 2551/3901 cut-off events. [2024-06-27 23:17:48,686 INFO L125 PetriNetUnfolderBase]: For 133429/133464 co-relation queries the response was YES. [2024-06-27 23:17:48,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25506 conditions, 3901 events. 2551/3901 cut-off events. For 133429/133464 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 19862 event pairs, 963 based on Foata normal form. 16/3890 useless extension candidates. Maximal degree in co-relation 25441. Up to 3328 conditions per place. [2024-06-27 23:17:48,718 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 157 selfloop transitions, 129 changer transitions 0/292 dead transitions. [2024-06-27 23:17:48,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 292 transitions, 3852 flow [2024-06-27 23:17:48,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:17:48,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:17:48,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-27 23:17:48,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4780361757105943 [2024-06-27 23:17:48,720 INFO L175 Difference]: Start difference. First operand has 148 places, 245 transitions, 2647 flow. Second operand 9 states and 185 transitions. [2024-06-27 23:17:48,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 292 transitions, 3852 flow [2024-06-27 23:17:48,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 292 transitions, 3736 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 23:17:48,833 INFO L231 Difference]: Finished difference. Result has 150 places, 259 transitions, 3059 flow [2024-06-27 23:17:48,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2531, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3059, PETRI_PLACES=150, PETRI_TRANSITIONS=259} [2024-06-27 23:17:48,834 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 106 predicate places. [2024-06-27 23:17:48,834 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 259 transitions, 3059 flow [2024-06-27 23:17:48,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:48,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:48,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:48,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 23:17:48,835 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)] === [2024-06-27 23:17:48,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:48,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1407708798, now seen corresponding path program 6 times [2024-06-27 23:17:48,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:48,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598023941] [2024-06-27 23:17:48,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:48,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:48,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:51,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:51,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:51,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598023941] [2024-06-27 23:17:51,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598023941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:51,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:51,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:17:51,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453301176] [2024-06-27 23:17:51,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:51,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:17:51,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:51,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:17:51,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:17:51,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:17:51,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 259 transitions, 3059 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:51,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:51,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:17:51,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:52,673 INFO L124 PetriNetUnfolderBase]: 2435/3786 cut-off events. [2024-06-27 23:17:52,673 INFO L125 PetriNetUnfolderBase]: For 143883/143911 co-relation queries the response was YES. [2024-06-27 23:17:52,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25959 conditions, 3786 events. 2435/3786 cut-off events. For 143883/143911 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 19718 event pairs, 899 based on Foata normal form. 14/3769 useless extension candidates. Maximal degree in co-relation 25892. Up to 3252 conditions per place. [2024-06-27 23:17:52,704 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 169 selfloop transitions, 93 changer transitions 0/288 dead transitions. [2024-06-27 23:17:52,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 288 transitions, 3813 flow [2024-06-27 23:17:52,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:17:52,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:17:52,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-27 23:17:52,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5016611295681063 [2024-06-27 23:17:52,706 INFO L175 Difference]: Start difference. First operand has 150 places, 259 transitions, 3059 flow. Second operand 7 states and 151 transitions. [2024-06-27 23:17:52,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 288 transitions, 3813 flow [2024-06-27 23:17:52,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 288 transitions, 3675 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-27 23:17:52,845 INFO L231 Difference]: Finished difference. Result has 154 places, 262 transitions, 3180 flow [2024-06-27 23:17:52,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2933, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3180, PETRI_PLACES=154, PETRI_TRANSITIONS=262} [2024-06-27 23:17:52,846 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 110 predicate places. [2024-06-27 23:17:52,846 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 262 transitions, 3180 flow [2024-06-27 23:17:52,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:52,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:52,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:52,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 23:17:52,847 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)] === [2024-06-27 23:17:52,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:52,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1407714533, now seen corresponding path program 4 times [2024-06-27 23:17:52,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:52,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793766461] [2024-06-27 23:17:52,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:52,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:52,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:55,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:55,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:55,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793766461] [2024-06-27 23:17:55,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793766461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:55,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:55,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:17:55,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111303987] [2024-06-27 23:17:55,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:55,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:17:55,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:55,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:17:55,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:17:55,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:17:55,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 262 transitions, 3180 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:55,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:55,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:17:55,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:56,357 INFO L124 PetriNetUnfolderBase]: 2557/3910 cut-off events. [2024-06-27 23:17:56,357 INFO L125 PetriNetUnfolderBase]: For 153266/153307 co-relation queries the response was YES. [2024-06-27 23:17:56,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27063 conditions, 3910 events. 2557/3910 cut-off events. For 153266/153307 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 19904 event pairs, 963 based on Foata normal form. 16/3899 useless extension candidates. Maximal degree in co-relation 26995. Up to 3339 conditions per place. [2024-06-27 23:17:56,390 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 152 selfloop transitions, 135 changer transitions 0/293 dead transitions. [2024-06-27 23:17:56,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 293 transitions, 4080 flow [2024-06-27 23:17:56,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:17:56,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:17:56,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-27 23:17:56,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-27 23:17:56,392 INFO L175 Difference]: Start difference. First operand has 154 places, 262 transitions, 3180 flow. Second operand 9 states and 182 transitions. [2024-06-27 23:17:56,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 293 transitions, 4080 flow [2024-06-27 23:17:56,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 293 transitions, 3841 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-27 23:17:56,549 INFO L231 Difference]: Finished difference. Result has 158 places, 262 transitions, 3220 flow [2024-06-27 23:17:56,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2941, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3220, PETRI_PLACES=158, PETRI_TRANSITIONS=262} [2024-06-27 23:17:56,551 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 114 predicate places. [2024-06-27 23:17:56,551 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 262 transitions, 3220 flow [2024-06-27 23:17:56,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:56,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:56,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:56,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 23:17:56,552 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:17:56,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:56,552 INFO L85 PathProgramCache]: Analyzing trace with hash 188667030, now seen corresponding path program 1 times [2024-06-27 23:17:56,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:56,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384113838] [2024-06-27 23:17:56,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:56,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:56,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:58,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:58,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:58,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384113838] [2024-06-27 23:17:58,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384113838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:58,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:58,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:17:58,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009864436] [2024-06-27 23:17:58,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:58,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:17:58,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:58,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:17:58,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:17:58,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:17:58,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 262 transitions, 3220 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:58,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:58,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:17:58,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:00,060 INFO L124 PetriNetUnfolderBase]: 2567/3932 cut-off events. [2024-06-27 23:18:00,060 INFO L125 PetriNetUnfolderBase]: For 162351/162381 co-relation queries the response was YES. [2024-06-27 23:18:00,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27542 conditions, 3932 events. 2567/3932 cut-off events. For 162351/162381 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 20089 event pairs, 1020 based on Foata normal form. 5/3911 useless extension candidates. Maximal degree in co-relation 27472. Up to 3548 conditions per place. [2024-06-27 23:18:00,093 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 230 selfloop transitions, 67 changer transitions 0/303 dead transitions. [2024-06-27 23:18:00,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 303 transitions, 4290 flow [2024-06-27 23:18:00,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:18:00,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:18:00,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-27 23:18:00,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46770025839793283 [2024-06-27 23:18:00,095 INFO L175 Difference]: Start difference. First operand has 158 places, 262 transitions, 3220 flow. Second operand 9 states and 181 transitions. [2024-06-27 23:18:00,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 303 transitions, 4290 flow [2024-06-27 23:18:00,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 303 transitions, 4046 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 23:18:00,252 INFO L231 Difference]: Finished difference. Result has 161 places, 272 transitions, 3297 flow [2024-06-27 23:18:00,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2976, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3297, PETRI_PLACES=161, PETRI_TRANSITIONS=272} [2024-06-27 23:18:00,253 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 117 predicate places. [2024-06-27 23:18:00,253 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 272 transitions, 3297 flow [2024-06-27 23:18:00,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:00,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:18:00,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:18:00,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 23:18:00,253 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:18:00,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:18:00,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1657691167, now seen corresponding path program 5 times [2024-06-27 23:18:00,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:18:00,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968073876] [2024-06-27 23:18:00,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:18:00,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:18:00,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:18:01,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:18:01,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:18:01,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968073876] [2024-06-27 23:18:01,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968073876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:18:01,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:18:01,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:18:01,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813281447] [2024-06-27 23:18:01,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:18:01,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:18:01,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:18:01,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:18:01,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:18:02,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:18:02,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 272 transitions, 3297 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:02,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:18:02,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:18:02,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:03,022 INFO L124 PetriNetUnfolderBase]: 2587/3964 cut-off events. [2024-06-27 23:18:03,022 INFO L125 PetriNetUnfolderBase]: For 176578/176603 co-relation queries the response was YES. [2024-06-27 23:18:03,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28342 conditions, 3964 events. 2587/3964 cut-off events. For 176578/176603 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 20311 event pairs, 1109 based on Foata normal form. 3/3938 useless extension candidates. Maximal degree in co-relation 28270. Up to 3689 conditions per place. [2024-06-27 23:18:03,055 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 246 selfloop transitions, 46 changer transitions 0/298 dead transitions. [2024-06-27 23:18:03,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 298 transitions, 4008 flow [2024-06-27 23:18:03,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:18:03,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:18:03,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 23:18:03,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-27 23:18:03,057 INFO L175 Difference]: Start difference. First operand has 161 places, 272 transitions, 3297 flow. Second operand 8 states and 151 transitions. [2024-06-27 23:18:03,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 298 transitions, 4008 flow [2024-06-27 23:18:03,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 298 transitions, 3908 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-27 23:18:03,262 INFO L231 Difference]: Finished difference. Result has 166 places, 278 transitions, 3374 flow [2024-06-27 23:18:03,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3197, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3374, PETRI_PLACES=166, PETRI_TRANSITIONS=278} [2024-06-27 23:18:03,263 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 122 predicate places. [2024-06-27 23:18:03,263 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 278 transitions, 3374 flow [2024-06-27 23:18:03,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:03,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:18:03,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:18:03,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 23:18:03,263 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:18:03,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:18:03,264 INFO L85 PathProgramCache]: Analyzing trace with hash 838592419, now seen corresponding path program 6 times [2024-06-27 23:18:03,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:18:03,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235329284] [2024-06-27 23:18:03,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:18:03,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:18:03,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:18:05,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:18:05,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:18:05,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235329284] [2024-06-27 23:18:05,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235329284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:18:05,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:18:05,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:18:05,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698776019] [2024-06-27 23:18:05,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:18:05,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:18:05,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:18:05,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:18:05,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:18:05,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:18:05,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 278 transitions, 3374 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:05,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:18:05,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:18:05,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:06,382 INFO L124 PetriNetUnfolderBase]: 2645/4050 cut-off events. [2024-06-27 23:18:06,383 INFO L125 PetriNetUnfolderBase]: For 189957/189984 co-relation queries the response was YES. [2024-06-27 23:18:06,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29429 conditions, 4050 events. 2645/4050 cut-off events. For 189957/189984 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 20752 event pairs, 1115 based on Foata normal form. 5/4026 useless extension candidates. Maximal degree in co-relation 29354. Up to 3576 conditions per place. [2024-06-27 23:18:06,435 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 208 selfloop transitions, 110 changer transitions 0/324 dead transitions. [2024-06-27 23:18:06,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 324 transitions, 4677 flow [2024-06-27 23:18:06,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:18:06,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:18:06,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 23:18:06,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-27 23:18:06,437 INFO L175 Difference]: Start difference. First operand has 166 places, 278 transitions, 3374 flow. Second operand 8 states and 161 transitions. [2024-06-27 23:18:06,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 324 transitions, 4677 flow [2024-06-27 23:18:06,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 324 transitions, 4600 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 23:18:06,732 INFO L231 Difference]: Finished difference. Result has 170 places, 296 transitions, 3835 flow [2024-06-27 23:18:06,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3297, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3835, PETRI_PLACES=170, PETRI_TRANSITIONS=296} [2024-06-27 23:18:06,733 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 126 predicate places. [2024-06-27 23:18:06,733 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 296 transitions, 3835 flow [2024-06-27 23:18:06,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:06,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:18:06,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:18:06,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 23:18:06,734 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:18:06,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:18:06,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1653966300, now seen corresponding path program 2 times [2024-06-27 23:18:06,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:18:06,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311354235] [2024-06-27 23:18:06,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:18:06,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:18:06,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:18:08,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:18:08,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:18:08,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311354235] [2024-06-27 23:18:08,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311354235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:18:08,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:18:08,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:18:08,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955981115] [2024-06-27 23:18:08,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:18:08,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:18:08,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:18:08,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:18:08,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:18:08,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:18:08,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 296 transitions, 3835 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:08,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:18:08,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:18:08,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:09,438 INFO L124 PetriNetUnfolderBase]: 2697/4131 cut-off events. [2024-06-27 23:18:09,438 INFO L125 PetriNetUnfolderBase]: For 204658/204685 co-relation queries the response was YES. [2024-06-27 23:18:09,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30636 conditions, 4131 events. 2697/4131 cut-off events. For 204658/204685 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 21270 event pairs, 1129 based on Foata normal form. 5/4106 useless extension candidates. Maximal degree in co-relation 30559. Up to 3731 conditions per place. [2024-06-27 23:18:09,474 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 266 selfloop transitions, 65 changer transitions 0/337 dead transitions. [2024-06-27 23:18:09,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 337 transitions, 4980 flow [2024-06-27 23:18:09,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:18:09,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:18:09,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 23:18:09,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 23:18:09,476 INFO L175 Difference]: Start difference. First operand has 170 places, 296 transitions, 3835 flow. Second operand 8 states and 160 transitions. [2024-06-27 23:18:09,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 337 transitions, 4980 flow [2024-06-27 23:18:09,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 337 transitions, 4752 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-27 23:18:09,707 INFO L231 Difference]: Finished difference. Result has 174 places, 308 transitions, 3939 flow [2024-06-27 23:18:09,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3607, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3939, PETRI_PLACES=174, PETRI_TRANSITIONS=308} [2024-06-27 23:18:09,708 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 130 predicate places. [2024-06-27 23:18:09,708 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 308 transitions, 3939 flow [2024-06-27 23:18:09,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:09,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:18:09,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:18:09,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 23:18:09,708 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)] === [2024-06-27 23:18:09,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:18:09,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1678376951, now seen corresponding path program 7 times [2024-06-27 23:18:09,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:18:09,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541272895] [2024-06-27 23:18:09,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:18:09,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:18:09,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:18:11,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:18:11,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:18:11,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541272895] [2024-06-27 23:18:11,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541272895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:18:11,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:18:11,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:18:11,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93574402] [2024-06-27 23:18:11,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:18:11,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:18:11,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:18:11,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:18:11,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:18:11,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:18:11,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 308 transitions, 3939 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:11,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:18:11,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:18:11,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:12,325 INFO L124 PetriNetUnfolderBase]: 2689/4122 cut-off events. [2024-06-27 23:18:12,325 INFO L125 PetriNetUnfolderBase]: For 214361/214388 co-relation queries the response was YES. [2024-06-27 23:18:12,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30974 conditions, 4122 events. 2689/4122 cut-off events. For 214361/214388 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 21238 event pairs, 1117 based on Foata normal form. 5/4097 useless extension candidates. Maximal degree in co-relation 30896. Up to 3643 conditions per place. [2024-06-27 23:18:12,366 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 222 selfloop transitions, 106 changer transitions 0/334 dead transitions. [2024-06-27 23:18:12,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 334 transitions, 4894 flow [2024-06-27 23:18:12,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:18:12,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:18:12,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 23:18:12,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 23:18:12,376 INFO L175 Difference]: Start difference. First operand has 174 places, 308 transitions, 3939 flow. Second operand 8 states and 160 transitions. [2024-06-27 23:18:12,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 334 transitions, 4894 flow [2024-06-27 23:18:12,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 334 transitions, 4728 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-06-27 23:18:12,591 INFO L231 Difference]: Finished difference. Result has 178 places, 308 transitions, 4001 flow [2024-06-27 23:18:12,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3773, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4001, PETRI_PLACES=178, PETRI_TRANSITIONS=308} [2024-06-27 23:18:12,592 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 134 predicate places. [2024-06-27 23:18:12,592 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 308 transitions, 4001 flow [2024-06-27 23:18:12,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:12,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:18:12,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:18:12,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 23:18:12,593 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)] === [2024-06-27 23:18:12,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:18:12,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1477069528, now seen corresponding path program 3 times [2024-06-27 23:18:12,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:18:12,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842315087] [2024-06-27 23:18:12,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:18:12,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:18:12,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:18:14,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:18:14,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:18:14,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842315087] [2024-06-27 23:18:14,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842315087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:18:14,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:18:14,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:18:14,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231842086] [2024-06-27 23:18:14,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:18:14,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:18:14,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:18:14,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:18:14,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:18:14,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:18:14,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 308 transitions, 4001 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:14,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:18:14,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:18:14,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:15,041 INFO L124 PetriNetUnfolderBase]: 2760/4230 cut-off events. [2024-06-27 23:18:15,042 INFO L125 PetriNetUnfolderBase]: For 231075/231100 co-relation queries the response was YES. [2024-06-27 23:18:15,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32372 conditions, 4230 events. 2760/4230 cut-off events. For 231075/231100 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 21960 event pairs, 1131 based on Foata normal form. 5/4206 useless extension candidates. Maximal degree in co-relation 32292. Up to 3919 conditions per place. [2024-06-27 23:18:15,079 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 312 selfloop transitions, 35 changer transitions 0/353 dead transitions. [2024-06-27 23:18:15,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 353 transitions, 5325 flow [2024-06-27 23:18:15,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:18:15,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:18:15,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 23:18:15,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-27 23:18:15,081 INFO L175 Difference]: Start difference. First operand has 178 places, 308 transitions, 4001 flow. Second operand 8 states and 155 transitions. [2024-06-27 23:18:15,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 353 transitions, 5325 flow [2024-06-27 23:18:15,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 353 transitions, 5065 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 23:18:15,330 INFO L231 Difference]: Finished difference. Result has 179 places, 322 transitions, 4114 flow [2024-06-27 23:18:15,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3741, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4114, PETRI_PLACES=179, PETRI_TRANSITIONS=322} [2024-06-27 23:18:15,331 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 135 predicate places. [2024-06-27 23:18:15,331 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 322 transitions, 4114 flow [2024-06-27 23:18:15,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:15,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:18:15,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:18:15,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 23:18:15,332 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:18:15,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:18:15,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1509866520, now seen corresponding path program 4 times [2024-06-27 23:18:15,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:18:15,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352566420] [2024-06-27 23:18:15,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:18:15,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:18:15,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:18:16,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:18:16,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:18:16,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352566420] [2024-06-27 23:18:16,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352566420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:18:16,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:18:16,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:18:16,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281664985] [2024-06-27 23:18:16,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:18:16,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:18:16,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:18:16,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:18:16,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:18:16,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:18:16,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 322 transitions, 4114 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:16,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:18:16,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:18:16,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:17,633 INFO L124 PetriNetUnfolderBase]: 2747/4212 cut-off events. [2024-06-27 23:18:17,634 INFO L125 PetriNetUnfolderBase]: For 239093/239118 co-relation queries the response was YES. [2024-06-27 23:18:17,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32211 conditions, 4212 events. 2747/4212 cut-off events. For 239093/239118 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 21858 event pairs, 1129 based on Foata normal form. 5/4188 useless extension candidates. Maximal degree in co-relation 32130. Up to 3946 conditions per place. [2024-06-27 23:18:17,672 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 318 selfloop transitions, 23 changer transitions 0/347 dead transitions. [2024-06-27 23:18:17,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 347 transitions, 4970 flow [2024-06-27 23:18:17,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:18:17,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:18:17,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 23:18:17,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-27 23:18:17,674 INFO L175 Difference]: Start difference. First operand has 179 places, 322 transitions, 4114 flow. Second operand 8 states and 150 transitions. [2024-06-27 23:18:17,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 347 transitions, 4970 flow [2024-06-27 23:18:17,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 347 transitions, 4790 flow, removed 78 selfloop flow, removed 4 redundant places. [2024-06-27 23:18:17,879 INFO L231 Difference]: Finished difference. Result has 183 places, 322 transitions, 3992 flow [2024-06-27 23:18:17,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3934, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3992, PETRI_PLACES=183, PETRI_TRANSITIONS=322} [2024-06-27 23:18:17,879 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 139 predicate places. [2024-06-27 23:18:17,879 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 322 transitions, 3992 flow [2024-06-27 23:18:17,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:17,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:18:17,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:18:17,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 23:18:17,880 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:18:17,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:18:17,880 INFO L85 PathProgramCache]: Analyzing trace with hash 118458415, now seen corresponding path program 8 times [2024-06-27 23:18:17,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:18:17,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088451771] [2024-06-27 23:18:17,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:18:17,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:18:17,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:18:19,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:18:19,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:18:19,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088451771] [2024-06-27 23:18:19,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088451771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:18:19,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:18:19,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:18:19,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530098190] [2024-06-27 23:18:19,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:18:19,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:18:19,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:18:19,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:18:19,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:18:19,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:18:19,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 322 transitions, 3992 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:19,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:18:19,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:18:19,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:20,375 INFO L124 PetriNetUnfolderBase]: 2765/4239 cut-off events. [2024-06-27 23:18:20,376 INFO L125 PetriNetUnfolderBase]: For 249794/249819 co-relation queries the response was YES. [2024-06-27 23:18:20,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32669 conditions, 4239 events. 2765/4239 cut-off events. For 249794/249819 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 22040 event pairs, 1129 based on Foata normal form. 3/4213 useless extension candidates. Maximal degree in co-relation 32587. Up to 3979 conditions per place. [2024-06-27 23:18:20,413 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 319 selfloop transitions, 25 changer transitions 0/350 dead transitions. [2024-06-27 23:18:20,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 350 transitions, 4938 flow [2024-06-27 23:18:20,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:18:20,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:18:20,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 23:18:20,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-27 23:18:20,415 INFO L175 Difference]: Start difference. First operand has 183 places, 322 transitions, 3992 flow. Second operand 8 states and 149 transitions. [2024-06-27 23:18:20,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 350 transitions, 4938 flow [2024-06-27 23:18:20,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 350 transitions, 4855 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-27 23:18:20,648 INFO L231 Difference]: Finished difference. Result has 183 places, 328 transitions, 4099 flow [2024-06-27 23:18:20,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3909, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4099, PETRI_PLACES=183, PETRI_TRANSITIONS=328} [2024-06-27 23:18:20,649 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 139 predicate places. [2024-06-27 23:18:20,649 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 328 transitions, 4099 flow [2024-06-27 23:18:20,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:20,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:18:20,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:18:20,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 23:18:20,650 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:18:20,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:18:20,650 INFO L85 PathProgramCache]: Analyzing trace with hash 118250870, now seen corresponding path program 7 times [2024-06-27 23:18:20,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:18:20,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286160828] [2024-06-27 23:18:20,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:18:20,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:18:20,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:18:22,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:18:22,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:18:22,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286160828] [2024-06-27 23:18:22,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286160828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:18:22,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:18:22,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:18:22,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173556838] [2024-06-27 23:18:22,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:18:22,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:18:22,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:18:22,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:18:22,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:18:22,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:18:22,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 328 transitions, 4099 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:22,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:18:22,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:18:22,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:23,697 INFO L124 PetriNetUnfolderBase]: 3040/4643 cut-off events. [2024-06-27 23:18:23,697 INFO L125 PetriNetUnfolderBase]: For 307721/307755 co-relation queries the response was YES. [2024-06-27 23:18:23,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36474 conditions, 4643 events. 3040/4643 cut-off events. For 307721/307755 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 24093 event pairs, 1291 based on Foata normal form. 3/4602 useless extension candidates. Maximal degree in co-relation 36392. Up to 4286 conditions per place. [2024-06-27 23:18:23,746 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 293 selfloop transitions, 25 changer transitions 0/353 dead transitions. [2024-06-27 23:18:23,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 353 transitions, 4932 flow [2024-06-27 23:18:23,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:18:23,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:18:23,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 23:18:23,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-27 23:18:23,748 INFO L175 Difference]: Start difference. First operand has 183 places, 328 transitions, 4099 flow. Second operand 8 states and 149 transitions. [2024-06-27 23:18:23,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 353 transitions, 4932 flow [2024-06-27 23:18:24,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 353 transitions, 4810 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-27 23:18:24,102 INFO L231 Difference]: Finished difference. Result has 185 places, 331 transitions, 4096 flow [2024-06-27 23:18:24,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3977, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4096, PETRI_PLACES=185, PETRI_TRANSITIONS=331} [2024-06-27 23:18:24,103 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 141 predicate places. [2024-06-27 23:18:24,103 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 331 transitions, 4096 flow [2024-06-27 23:18:24,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:24,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:18:24,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:18:24,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 23:18:24,104 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:18:24,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:18:24,104 INFO L85 PathProgramCache]: Analyzing trace with hash -457862273, now seen corresponding path program 9 times [2024-06-27 23:18:24,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:18:24,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700359657] [2024-06-27 23:18:24,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:18:24,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:18:24,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:18:25,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:18:25,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:18:25,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700359657] [2024-06-27 23:18:25,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700359657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:18:25,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:18:25,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:18:25,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126207178] [2024-06-27 23:18:25,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:18:25,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:18:25,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:18:25,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:18:25,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:18:25,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:18:25,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 331 transitions, 4096 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:25,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:18:25,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:18:25,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:26,918 INFO L124 PetriNetUnfolderBase]: 2778/4259 cut-off events. [2024-06-27 23:18:26,919 INFO L125 PetriNetUnfolderBase]: For 275290/275321 co-relation queries the response was YES. [2024-06-27 23:18:26,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33703 conditions, 4259 events. 2778/4259 cut-off events. For 275290/275321 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 22136 event pairs, 1129 based on Foata normal form. 3/4233 useless extension candidates. Maximal degree in co-relation 33620. Up to 3928 conditions per place. [2024-06-27 23:18:26,960 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 305 selfloop transitions, 52 changer transitions 0/363 dead transitions. [2024-06-27 23:18:26,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 363 transitions, 5273 flow [2024-06-27 23:18:26,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:18:26,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:18:26,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 23:18:26,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-27 23:18:26,962 INFO L175 Difference]: Start difference. First operand has 185 places, 331 transitions, 4096 flow. Second operand 8 states and 154 transitions. [2024-06-27 23:18:26,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 363 transitions, 5273 flow [2024-06-27 23:18:27,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 363 transitions, 5180 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 23:18:27,241 INFO L231 Difference]: Finished difference. Result has 187 places, 337 transitions, 4247 flow [2024-06-27 23:18:27,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4003, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4247, PETRI_PLACES=187, PETRI_TRANSITIONS=337} [2024-06-27 23:18:27,241 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 143 predicate places. [2024-06-27 23:18:27,242 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 337 transitions, 4247 flow [2024-06-27 23:18:27,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:27,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:18:27,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:18:27,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 23:18:27,242 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)] === [2024-06-27 23:18:27,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:18:27,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1510075987, now seen corresponding path program 10 times [2024-06-27 23:18:27,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:18:27,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643500670] [2024-06-27 23:18:27,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:18:27,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:18:27,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:18:28,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:18:28,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:18:28,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643500670] [2024-06-27 23:18:28,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643500670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:18:28,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:18:28,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:18:28,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673973312] [2024-06-27 23:18:28,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:18:28,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:18:28,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:18:28,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:18:28,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:18:28,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:18:28,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 337 transitions, 4247 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:28,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:18:28,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:18:28,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:29,899 INFO L124 PetriNetUnfolderBase]: 2770/4248 cut-off events. [2024-06-27 23:18:29,900 INFO L125 PetriNetUnfolderBase]: For 286229/286260 co-relation queries the response was YES. [2024-06-27 23:18:29,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33875 conditions, 4248 events. 2770/4248 cut-off events. For 286229/286260 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 22068 event pairs, 1129 based on Foata normal form. 3/4222 useless extension candidates. Maximal degree in co-relation 33791. Up to 3920 conditions per place. [2024-06-27 23:18:29,940 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 307 selfloop transitions, 50 changer transitions 0/363 dead transitions. [2024-06-27 23:18:29,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 363 transitions, 5178 flow [2024-06-27 23:18:29,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:18:29,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:18:29,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 23:18:29,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-27 23:18:29,942 INFO L175 Difference]: Start difference. First operand has 187 places, 337 transitions, 4247 flow. Second operand 8 states and 153 transitions. [2024-06-27 23:18:29,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 363 transitions, 5178 flow [2024-06-27 23:18:30,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 363 transitions, 4832 flow, removed 82 selfloop flow, removed 7 redundant places. [2024-06-27 23:18:30,223 INFO L231 Difference]: Finished difference. Result has 188 places, 337 transitions, 4013 flow [2024-06-27 23:18:30,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3901, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4013, PETRI_PLACES=188, PETRI_TRANSITIONS=337} [2024-06-27 23:18:30,224 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 144 predicate places. [2024-06-27 23:18:30,224 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 337 transitions, 4013 flow [2024-06-27 23:18:30,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:30,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:18:30,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:18:30,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 23:18:30,224 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:18:30,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:18:30,225 INFO L85 PathProgramCache]: Analyzing trace with hash 118256822, now seen corresponding path program 5 times [2024-06-27 23:18:30,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:18:30,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757418441] [2024-06-27 23:18:30,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:18:30,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:18:30,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:18:31,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:18:31,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:18:31,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757418441] [2024-06-27 23:18:31,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757418441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:18:31,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:18:31,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:18:31,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026196588] [2024-06-27 23:18:31,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:18:31,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:18:31,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:18:31,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:18:31,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:18:31,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:18:31,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 337 transitions, 4013 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:31,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:18:31,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:18:31,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:32,855 INFO L124 PetriNetUnfolderBase]: 2757/4230 cut-off events. [2024-06-27 23:18:32,855 INFO L125 PetriNetUnfolderBase]: For 295099/295130 co-relation queries the response was YES. [2024-06-27 23:18:32,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33493 conditions, 4230 events. 2757/4230 cut-off events. For 295099/295130 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 21948 event pairs, 1127 based on Foata normal form. 5/4206 useless extension candidates. Maximal degree in co-relation 33409. Up to 3874 conditions per place. [2024-06-27 23:18:32,898 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 310 selfloop transitions, 51 changer transitions 0/367 dead transitions. [2024-06-27 23:18:32,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 367 transitions, 4965 flow [2024-06-27 23:18:32,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:18:32,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:18:32,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 23:18:32,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-27 23:18:32,899 INFO L175 Difference]: Start difference. First operand has 188 places, 337 transitions, 4013 flow. Second operand 8 states and 155 transitions. [2024-06-27 23:18:32,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 367 transitions, 4965 flow [2024-06-27 23:18:33,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 367 transitions, 4684 flow, removed 56 selfloop flow, removed 8 redundant places. [2024-06-27 23:18:33,252 INFO L231 Difference]: Finished difference. Result has 188 places, 337 transitions, 3866 flow [2024-06-27 23:18:33,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3751, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3866, PETRI_PLACES=188, PETRI_TRANSITIONS=337} [2024-06-27 23:18:33,254 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 144 predicate places. [2024-06-27 23:18:33,254 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 337 transitions, 3866 flow [2024-06-27 23:18:33,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:33,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:18:33,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:18:33,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 23:18:33,255 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:18:33,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:18:33,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1471440884, now seen corresponding path program 1 times [2024-06-27 23:18:33,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:18:33,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550916169] [2024-06-27 23:18:33,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:18:33,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:18:33,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:18:35,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:18:35,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:18:35,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550916169] [2024-06-27 23:18:35,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550916169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:18:35,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:18:35,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:18:35,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578046885] [2024-06-27 23:18:35,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:18:35,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:18:35,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:18:35,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:18:35,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:18:35,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:18:35,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 337 transitions, 3866 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:35,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:18:35,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:18:35,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:36,996 INFO L124 PetriNetUnfolderBase]: 3196/4817 cut-off events. [2024-06-27 23:18:36,997 INFO L125 PetriNetUnfolderBase]: For 348270/348301 co-relation queries the response was YES. [2024-06-27 23:18:37,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37889 conditions, 4817 events. 3196/4817 cut-off events. For 348270/348301 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 24466 event pairs, 1320 based on Foata normal form. 4/4791 useless extension candidates. Maximal degree in co-relation 37804. Up to 4566 conditions per place. [2024-06-27 23:18:37,036 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 345 selfloop transitions, 31 changer transitions 0/381 dead transitions. [2024-06-27 23:18:37,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 381 transitions, 4986 flow [2024-06-27 23:18:37,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:18:37,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:18:37,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 23:18:37,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-27 23:18:37,043 INFO L175 Difference]: Start difference. First operand has 188 places, 337 transitions, 3866 flow. Second operand 9 states and 164 transitions. [2024-06-27 23:18:37,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 381 transitions, 4986 flow [2024-06-27 23:18:37,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 381 transitions, 4723 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-27 23:18:37,368 INFO L231 Difference]: Finished difference. Result has 191 places, 353 transitions, 3921 flow [2024-06-27 23:18:37,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3625, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3921, PETRI_PLACES=191, PETRI_TRANSITIONS=353} [2024-06-27 23:18:37,370 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 147 predicate places. [2024-06-27 23:18:37,370 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 353 transitions, 3921 flow [2024-06-27 23:18:37,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:37,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:18:37,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:18:37,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 23:18:37,370 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:18:37,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:18:37,371 INFO L85 PathProgramCache]: Analyzing trace with hash -827920359, now seen corresponding path program 1 times [2024-06-27 23:18:37,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:18:37,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004076344] [2024-06-27 23:18:37,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:18:37,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:18:37,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:18:39,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:18:39,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:18:39,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004076344] [2024-06-27 23:18:39,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004076344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:18:39,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:18:39,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:18:39,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705073986] [2024-06-27 23:18:39,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:18:39,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:18:39,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:18:39,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:18:39,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:18:39,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:18:39,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 353 transitions, 3921 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:39,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:18:39,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:18:39,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:40,532 INFO L124 PetriNetUnfolderBase]: 3013/4630 cut-off events. [2024-06-27 23:18:40,532 INFO L125 PetriNetUnfolderBase]: For 357341/357374 co-relation queries the response was YES. [2024-06-27 23:18:40,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37016 conditions, 4630 events. 3013/4630 cut-off events. For 357341/357374 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 24187 event pairs, 1356 based on Foata normal form. 14/4619 useless extension candidates. Maximal degree in co-relation 36928. Up to 4261 conditions per place. [2024-06-27 23:18:40,575 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 280 selfloop transitions, 13 changer transitions 0/364 dead transitions. [2024-06-27 23:18:40,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 364 transitions, 4575 flow [2024-06-27 23:18:40,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:18:40,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:18:40,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-27 23:18:40,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 23:18:40,577 INFO L175 Difference]: Start difference. First operand has 191 places, 353 transitions, 3921 flow. Second operand 6 states and 108 transitions. [2024-06-27 23:18:40,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 364 transitions, 4575 flow [2024-06-27 23:18:40,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 364 transitions, 4490 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-27 23:18:41,001 INFO L231 Difference]: Finished difference. Result has 193 places, 356 transitions, 3904 flow [2024-06-27 23:18:41,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3836, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3904, PETRI_PLACES=193, PETRI_TRANSITIONS=356} [2024-06-27 23:18:41,001 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 149 predicate places. [2024-06-27 23:18:41,001 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 356 transitions, 3904 flow [2024-06-27 23:18:41,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:41,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:18:41,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:18:41,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 23:18:41,002 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:18:41,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:18:41,002 INFO L85 PathProgramCache]: Analyzing trace with hash -600737302, now seen corresponding path program 1 times [2024-06-27 23:18:41,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:18:41,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902780995] [2024-06-27 23:18:41,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:18:41,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:18:41,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:18:42,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:18:42,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:18:42,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902780995] [2024-06-27 23:18:42,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902780995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:18:42,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:18:42,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:18:42,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514073303] [2024-06-27 23:18:42,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:18:42,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:18:42,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:18:42,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:18:42,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:18:42,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-27 23:18:42,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 356 transitions, 3904 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:42,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:18:42,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-27 23:18:42,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:43,972 INFO L124 PetriNetUnfolderBase]: 2475/4080 cut-off events. [2024-06-27 23:18:43,972 INFO L125 PetriNetUnfolderBase]: For 365030/365142 co-relation queries the response was YES. [2024-06-27 23:18:43,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34723 conditions, 4080 events. 2475/4080 cut-off events. For 365030/365142 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 23981 event pairs, 607 based on Foata normal form. 14/4000 useless extension candidates. Maximal degree in co-relation 34631. Up to 3117 conditions per place. [2024-06-27 23:18:44,014 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 235 selfloop transitions, 103 changer transitions 0/403 dead transitions. [2024-06-27 23:18:44,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 403 transitions, 5222 flow [2024-06-27 23:18:44,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:18:44,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:18:44,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-27 23:18:44,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5302325581395348 [2024-06-27 23:18:44,016 INFO L175 Difference]: Start difference. First operand has 193 places, 356 transitions, 3904 flow. Second operand 10 states and 228 transitions. [2024-06-27 23:18:44,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 403 transitions, 5222 flow [2024-06-27 23:18:44,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 403 transitions, 5190 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 23:18:44,342 INFO L231 Difference]: Finished difference. Result has 201 places, 366 transitions, 4378 flow [2024-06-27 23:18:44,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3872, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4378, PETRI_PLACES=201, PETRI_TRANSITIONS=366} [2024-06-27 23:18:44,342 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 157 predicate places. [2024-06-27 23:18:44,342 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 366 transitions, 4378 flow [2024-06-27 23:18:44,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:44,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:18:44,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:18:44,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 23:18:44,343 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:18:44,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:18:44,344 INFO L85 PathProgramCache]: Analyzing trace with hash 689305988, now seen corresponding path program 2 times [2024-06-27 23:18:44,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:18:44,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093365643] [2024-06-27 23:18:44,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:18:44,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:18:44,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:18:46,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:18:46,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:18:46,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093365643] [2024-06-27 23:18:46,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093365643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:18:46,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:18:46,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:18:46,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40452891] [2024-06-27 23:18:46,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:18:46,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:18:46,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:18:46,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:18:46,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:18:47,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:18:47,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 366 transitions, 4378 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:47,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:18:47,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:18:47,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:48,726 INFO L124 PetriNetUnfolderBase]: 3098/4771 cut-off events. [2024-06-27 23:18:48,727 INFO L125 PetriNetUnfolderBase]: For 393673/393698 co-relation queries the response was YES. [2024-06-27 23:18:48,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40542 conditions, 4771 events. 3098/4771 cut-off events. For 393673/393698 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 25277 event pairs, 934 based on Foata normal form. 12/4765 useless extension candidates. Maximal degree in co-relation 40446. Up to 3830 conditions per place. [2024-06-27 23:18:48,780 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 234 selfloop transitions, 180 changer transitions 0/421 dead transitions. [2024-06-27 23:18:48,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 421 transitions, 6382 flow [2024-06-27 23:18:48,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:18:48,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:18:48,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-27 23:18:48,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48604651162790696 [2024-06-27 23:18:48,791 INFO L175 Difference]: Start difference. First operand has 201 places, 366 transitions, 4378 flow. Second operand 10 states and 209 transitions. [2024-06-27 23:18:48,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 421 transitions, 6382 flow [2024-06-27 23:18:49,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 421 transitions, 6234 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-27 23:18:49,192 INFO L231 Difference]: Finished difference. Result has 207 places, 382 transitions, 4992 flow [2024-06-27 23:18:49,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4244, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4992, PETRI_PLACES=207, PETRI_TRANSITIONS=382} [2024-06-27 23:18:49,193 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 163 predicate places. [2024-06-27 23:18:49,193 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 382 transitions, 4992 flow [2024-06-27 23:18:49,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:49,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:18:49,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:18:49,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 23:18:49,194 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:18:49,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:18:49,194 INFO L85 PathProgramCache]: Analyzing trace with hash 68036948, now seen corresponding path program 1 times [2024-06-27 23:18:49,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:18:49,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531715748] [2024-06-27 23:18:49,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:18:49,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:18:49,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:18:51,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:18:51,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:18:51,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531715748] [2024-06-27 23:18:51,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531715748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:18:51,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:18:51,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:18:51,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161565600] [2024-06-27 23:18:51,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:18:51,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:18:51,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:18:51,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:18:51,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:18:51,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:18:51,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 382 transitions, 4992 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:51,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:18:51,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:18:51,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:52,764 INFO L124 PetriNetUnfolderBase]: 3187/4883 cut-off events. [2024-06-27 23:18:52,764 INFO L125 PetriNetUnfolderBase]: For 424814/424843 co-relation queries the response was YES. [2024-06-27 23:18:52,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43024 conditions, 4883 events. 3187/4883 cut-off events. For 424814/424843 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 25838 event pairs, 968 based on Foata normal form. 12/4866 useless extension candidates. Maximal degree in co-relation 42927. Up to 4258 conditions per place. [2024-06-27 23:18:52,817 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 299 selfloop transitions, 124 changer transitions 0/430 dead transitions. [2024-06-27 23:18:52,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 430 transitions, 6542 flow [2024-06-27 23:18:52,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:18:52,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:18:52,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-27 23:18:52,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 23:18:52,820 INFO L175 Difference]: Start difference. First operand has 207 places, 382 transitions, 4992 flow. Second operand 11 states and 215 transitions. [2024-06-27 23:18:52,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 430 transitions, 6542 flow [2024-06-27 23:18:53,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 430 transitions, 6417 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-27 23:18:53,318 INFO L231 Difference]: Finished difference. Result has 216 places, 392 transitions, 5415 flow [2024-06-27 23:18:53,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4891, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5415, PETRI_PLACES=216, PETRI_TRANSITIONS=392} [2024-06-27 23:18:53,319 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 172 predicate places. [2024-06-27 23:18:53,319 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 392 transitions, 5415 flow [2024-06-27 23:18:53,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:53,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:18:53,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:18:53,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 23:18:53,320 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:18:53,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:18:53,320 INFO L85 PathProgramCache]: Analyzing trace with hash 122837512, now seen corresponding path program 2 times [2024-06-27 23:18:53,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:18:53,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803131797] [2024-06-27 23:18:53,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:18:53,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:18:53,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:18:56,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:18:56,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:18:56,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803131797] [2024-06-27 23:18:56,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803131797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:18:56,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:18:56,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:18:56,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997165785] [2024-06-27 23:18:56,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:18:56,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:18:56,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:18:56,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:18:56,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:18:56,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:18:56,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 392 transitions, 5415 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:56,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:18:56,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:18:56,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:57,791 INFO L124 PetriNetUnfolderBase]: 3147/4917 cut-off events. [2024-06-27 23:18:57,791 INFO L125 PetriNetUnfolderBase]: For 449543/449586 co-relation queries the response was YES. [2024-06-27 23:18:57,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44342 conditions, 4917 events. 3147/4917 cut-off events. For 449543/449586 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 27002 event pairs, 938 based on Foata normal form. 19/4909 useless extension candidates. Maximal degree in co-relation 44242. Up to 4201 conditions per place. [2024-06-27 23:18:57,837 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 314 selfloop transitions, 101 changer transitions 0/457 dead transitions. [2024-06-27 23:18:57,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 457 transitions, 6959 flow [2024-06-27 23:18:57,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:18:57,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:18:57,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 229 transitions. [2024-06-27 23:18:57,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48414376321353064 [2024-06-27 23:18:57,842 INFO L175 Difference]: Start difference. First operand has 216 places, 392 transitions, 5415 flow. Second operand 11 states and 229 transitions. [2024-06-27 23:18:57,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 457 transitions, 6959 flow [2024-06-27 23:18:58,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 457 transitions, 6770 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-27 23:18:58,303 INFO L231 Difference]: Finished difference. Result has 221 places, 408 transitions, 5732 flow [2024-06-27 23:18:58,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5232, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5732, PETRI_PLACES=221, PETRI_TRANSITIONS=408} [2024-06-27 23:18:58,304 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 177 predicate places. [2024-06-27 23:18:58,304 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 408 transitions, 5732 flow [2024-06-27 23:18:58,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:58,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:18:58,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:18:58,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 23:18:58,305 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)] === [2024-06-27 23:18:58,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:18:58,305 INFO L85 PathProgramCache]: Analyzing trace with hash 126025676, now seen corresponding path program 2 times [2024-06-27 23:18:58,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:18:58,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602372894] [2024-06-27 23:18:58,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:18:58,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:18:58,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:19:01,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:19:01,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:19:01,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602372894] [2024-06-27 23:19:01,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602372894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:19:01,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:19:01,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:19:01,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916254725] [2024-06-27 23:19:01,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:19:01,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:19:01,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:19:01,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:19:01,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:19:01,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:19:01,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 408 transitions, 5732 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:19:01,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:19:01,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:19:01,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:19:03,047 INFO L124 PetriNetUnfolderBase]: 3325/5108 cut-off events. [2024-06-27 23:19:03,047 INFO L125 PetriNetUnfolderBase]: For 453645/453674 co-relation queries the response was YES. [2024-06-27 23:19:03,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46018 conditions, 5108 events. 3325/5108 cut-off events. For 453645/453674 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 27464 event pairs, 997 based on Foata normal form. 13/5092 useless extension candidates. Maximal degree in co-relation 45917. Up to 4466 conditions per place. [2024-06-27 23:19:03,097 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 317 selfloop transitions, 130 changer transitions 0/454 dead transitions. [2024-06-27 23:19:03,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 454 transitions, 7217 flow [2024-06-27 23:19:03,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:19:03,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:19:03,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-27 23:19:03,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4790697674418605 [2024-06-27 23:19:03,099 INFO L175 Difference]: Start difference. First operand has 221 places, 408 transitions, 5732 flow. Second operand 10 states and 206 transitions. [2024-06-27 23:19:03,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 454 transitions, 7217 flow [2024-06-27 23:19:03,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 454 transitions, 6995 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-27 23:19:03,594 INFO L231 Difference]: Finished difference. Result has 224 places, 414 transitions, 5900 flow [2024-06-27 23:19:03,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5510, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5900, PETRI_PLACES=224, PETRI_TRANSITIONS=414} [2024-06-27 23:19:03,595 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 180 predicate places. [2024-06-27 23:19:03,595 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 414 transitions, 5900 flow [2024-06-27 23:19:03,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:19:03,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:19:03,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:19:03,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 23:19:03,596 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)] === [2024-06-27 23:19:03,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:19:03,596 INFO L85 PathProgramCache]: Analyzing trace with hash 209138722, now seen corresponding path program 3 times [2024-06-27 23:19:03,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:19:03,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626368920] [2024-06-27 23:19:03,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:19:03,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:19:03,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:19:07,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:19:07,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:19:07,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626368920] [2024-06-27 23:19:07,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626368920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:19:07,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:19:07,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:19:07,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637081088] [2024-06-27 23:19:07,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:19:07,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:19:07,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:19:07,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:19:07,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:19:07,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 23:19:07,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 414 transitions, 5900 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:19:07,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:19:07,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 23:19:07,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:19:08,667 INFO L124 PetriNetUnfolderBase]: 3221/5023 cut-off events. [2024-06-27 23:19:08,668 INFO L125 PetriNetUnfolderBase]: For 482181/482242 co-relation queries the response was YES. [2024-06-27 23:19:08,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45956 conditions, 5023 events. 3221/5023 cut-off events. For 482181/482242 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 27706 event pairs, 959 based on Foata normal form. 25/5012 useless extension candidates. Maximal degree in co-relation 45852. Up to 4270 conditions per place. [2024-06-27 23:19:08,721 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 299 selfloop transitions, 115 changer transitions 0/458 dead transitions. [2024-06-27 23:19:08,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 458 transitions, 7129 flow [2024-06-27 23:19:08,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:19:08,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:19:08,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-27 23:19:08,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5116279069767442 [2024-06-27 23:19:08,723 INFO L175 Difference]: Start difference. First operand has 224 places, 414 transitions, 5900 flow. Second operand 9 states and 198 transitions. [2024-06-27 23:19:08,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 458 transitions, 7129 flow [2024-06-27 23:19:09,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 458 transitions, 6781 flow, removed 77 selfloop flow, removed 7 redundant places. [2024-06-27 23:19:09,260 INFO L231 Difference]: Finished difference. Result has 226 places, 420 transitions, 5943 flow [2024-06-27 23:19:09,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5552, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5943, PETRI_PLACES=226, PETRI_TRANSITIONS=420} [2024-06-27 23:19:09,261 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 182 predicate places. [2024-06-27 23:19:09,261 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 420 transitions, 5943 flow [2024-06-27 23:19:09,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:19:09,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:19:09,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:19:09,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 23:19:09,262 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)] === [2024-06-27 23:19:09,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:19:09,262 INFO L85 PathProgramCache]: Analyzing trace with hash 212717486, now seen corresponding path program 3 times [2024-06-27 23:19:09,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:19:09,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032932566] [2024-06-27 23:19:09,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:19:09,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:19:09,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:19:12,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:19:12,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:19:12,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032932566] [2024-06-27 23:19:12,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032932566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:19:12,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:19:12,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:19:12,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807991037] [2024-06-27 23:19:12,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:19:12,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:19:12,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:19:12,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:19:12,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:19:12,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:19:12,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 420 transitions, 5943 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:19:12,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:19:12,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:19:12,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:19:14,257 INFO L124 PetriNetUnfolderBase]: 3388/5212 cut-off events. [2024-06-27 23:19:14,257 INFO L125 PetriNetUnfolderBase]: For 468097/468113 co-relation queries the response was YES. [2024-06-27 23:19:14,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47217 conditions, 5212 events. 3388/5212 cut-off events. For 468097/468113 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 28214 event pairs, 1030 based on Foata normal form. 5/5193 useless extension candidates. Maximal degree in co-relation 47113. Up to 4731 conditions per place. [2024-06-27 23:19:14,308 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 368 selfloop transitions, 99 changer transitions 0/474 dead transitions. [2024-06-27 23:19:14,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 474 transitions, 7520 flow [2024-06-27 23:19:14,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:19:14,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:19:14,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-27 23:19:14,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4587737843551797 [2024-06-27 23:19:14,310 INFO L175 Difference]: Start difference. First operand has 226 places, 420 transitions, 5943 flow. Second operand 11 states and 217 transitions. [2024-06-27 23:19:14,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 474 transitions, 7520 flow [2024-06-27 23:19:14,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 474 transitions, 7227 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-27 23:19:14,859 INFO L231 Difference]: Finished difference. Result has 230 places, 432 transitions, 6074 flow [2024-06-27 23:19:14,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5650, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6074, PETRI_PLACES=230, PETRI_TRANSITIONS=432} [2024-06-27 23:19:14,860 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 186 predicate places. [2024-06-27 23:19:14,860 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 432 transitions, 6074 flow [2024-06-27 23:19:14,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:19:14,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:19:14,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:19:14,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 23:19:14,860 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)] === [2024-06-27 23:19:14,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:19:14,861 INFO L85 PathProgramCache]: Analyzing trace with hash 212867402, now seen corresponding path program 3 times [2024-06-27 23:19:14,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:19:14,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384800638] [2024-06-27 23:19:14,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:19:14,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:19:14,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:19:17,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:19:17,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:19:17,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384800638] [2024-06-27 23:19:17,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384800638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:19:17,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:19:17,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:19:17,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849894899] [2024-06-27 23:19:17,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:19:17,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:19:17,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:19:17,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:19:17,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:19:17,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:19:17,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 432 transitions, 6074 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:19:17,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:19:17,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:19:17,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:19:19,049 INFO L124 PetriNetUnfolderBase]: 3436/5298 cut-off events. [2024-06-27 23:19:19,050 INFO L125 PetriNetUnfolderBase]: For 487535/487550 co-relation queries the response was YES. [2024-06-27 23:19:19,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47967 conditions, 5298 events. 3436/5298 cut-off events. For 487535/487550 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 28898 event pairs, 1044 based on Foata normal form. 4/5280 useless extension candidates. Maximal degree in co-relation 47862. Up to 4791 conditions per place. [2024-06-27 23:19:19,111 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 381 selfloop transitions, 100 changer transitions 0/488 dead transitions. [2024-06-27 23:19:19,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 488 transitions, 7800 flow [2024-06-27 23:19:19,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 23:19:19,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 23:19:19,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 228 transitions. [2024-06-27 23:19:19,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 23:19:19,112 INFO L175 Difference]: Start difference. First operand has 230 places, 432 transitions, 6074 flow. Second operand 12 states and 228 transitions. [2024-06-27 23:19:19,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 488 transitions, 7800 flow [2024-06-27 23:19:19,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 488 transitions, 7610 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-27 23:19:19,878 INFO L231 Difference]: Finished difference. Result has 237 places, 446 transitions, 6380 flow [2024-06-27 23:19:19,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5884, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6380, PETRI_PLACES=237, PETRI_TRANSITIONS=446} [2024-06-27 23:19:19,879 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 193 predicate places. [2024-06-27 23:19:19,879 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 446 transitions, 6380 flow [2024-06-27 23:19:19,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:19:19,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:19:19,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:19:19,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 23:19:19,879 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)] === [2024-06-27 23:19:19,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:19:19,882 INFO L85 PathProgramCache]: Analyzing trace with hash 212861636, now seen corresponding path program 4 times [2024-06-27 23:19:19,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:19:19,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39800342] [2024-06-27 23:19:19,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:19:19,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:19:19,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:19:22,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:19:22,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:19:22,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39800342] [2024-06-27 23:19:22,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39800342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:19:22,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:19:22,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:19:22,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083399151] [2024-06-27 23:19:22,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:19:22,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:19:22,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:19:22,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:19:22,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:19:22,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:19:22,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 446 transitions, 6380 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:19:22,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:19:22,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:19:22,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:19:24,732 INFO L124 PetriNetUnfolderBase]: 3428/5283 cut-off events. [2024-06-27 23:19:24,733 INFO L125 PetriNetUnfolderBase]: For 504050/504066 co-relation queries the response was YES. [2024-06-27 23:19:24,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48499 conditions, 5283 events. 3428/5283 cut-off events. For 504050/504066 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 28757 event pairs, 1051 based on Foata normal form. 5/5263 useless extension candidates. Maximal degree in co-relation 48389. Up to 4822 conditions per place. [2024-06-27 23:19:24,786 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 387 selfloop transitions, 91 changer transitions 0/485 dead transitions. [2024-06-27 23:19:24,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 485 transitions, 7587 flow [2024-06-27 23:19:24,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 23:19:24,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 23:19:24,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 223 transitions. [2024-06-27 23:19:24,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4321705426356589 [2024-06-27 23:19:24,788 INFO L175 Difference]: Start difference. First operand has 237 places, 446 transitions, 6380 flow. Second operand 12 states and 223 transitions. [2024-06-27 23:19:24,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 485 transitions, 7587 flow [2024-06-27 23:19:25,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 485 transitions, 7288 flow, removed 58 selfloop flow, removed 8 redundant places. [2024-06-27 23:19:25,446 INFO L231 Difference]: Finished difference. Result has 241 places, 446 transitions, 6276 flow [2024-06-27 23:19:25,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6081, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6276, PETRI_PLACES=241, PETRI_TRANSITIONS=446} [2024-06-27 23:19:25,446 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 197 predicate places. [2024-06-27 23:19:25,446 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 446 transitions, 6276 flow [2024-06-27 23:19:25,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:19:25,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:19:25,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:19:25,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 23:19:25,447 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)] === [2024-06-27 23:19:25,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:19:25,447 INFO L85 PathProgramCache]: Analyzing trace with hash 684714268, now seen corresponding path program 4 times [2024-06-27 23:19:25,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:19:25,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290388520] [2024-06-27 23:19:25,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:19:25,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:19:25,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:19:29,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:19:29,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:19:29,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290388520] [2024-06-27 23:19:29,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290388520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:19:29,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:19:29,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:19:29,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854158774] [2024-06-27 23:19:29,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:19:29,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:19:29,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:19:29,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:19:29,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:19:29,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 23:19:29,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 446 transitions, 6276 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:19:29,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:19:29,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 23:19:29,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:19:30,884 INFO L124 PetriNetUnfolderBase]: 3350/5182 cut-off events. [2024-06-27 23:19:30,885 INFO L125 PetriNetUnfolderBase]: For 572403/572492 co-relation queries the response was YES. [2024-06-27 23:19:30,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49525 conditions, 5182 events. 3350/5182 cut-off events. For 572403/572492 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 28642 event pairs, 813 based on Foata normal form. 28/5136 useless extension candidates. Maximal degree in co-relation 49414. Up to 4258 conditions per place. [2024-06-27 23:19:30,953 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 305 selfloop transitions, 132 changer transitions 0/485 dead transitions. [2024-06-27 23:19:30,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 485 transitions, 7445 flow [2024-06-27 23:19:30,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:19:30,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:19:30,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-27 23:19:30,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4930232558139535 [2024-06-27 23:19:30,955 INFO L175 Difference]: Start difference. First operand has 241 places, 446 transitions, 6276 flow. Second operand 10 states and 212 transitions. [2024-06-27 23:19:30,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 485 transitions, 7445 flow [2024-06-27 23:19:31,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 485 transitions, 7190 flow, removed 32 selfloop flow, removed 11 redundant places. [2024-06-27 23:19:31,635 INFO L231 Difference]: Finished difference. Result has 240 places, 446 transitions, 6305 flow [2024-06-27 23:19:31,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6021, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6305, PETRI_PLACES=240, PETRI_TRANSITIONS=446} [2024-06-27 23:19:31,635 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 196 predicate places. [2024-06-27 23:19:31,636 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 446 transitions, 6305 flow [2024-06-27 23:19:31,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:19:31,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:19:31,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:19:31,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 23:19:31,636 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)] === [2024-06-27 23:19:31,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:19:31,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1992398921, now seen corresponding path program 1 times [2024-06-27 23:19:31,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:19:31,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444876440] [2024-06-27 23:19:31,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:19:31,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:19:31,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:19:34,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:19:34,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:19:34,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444876440] [2024-06-27 23:19:34,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444876440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:19:34,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:19:34,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:19:34,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958800661] [2024-06-27 23:19:34,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:19:34,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:19:34,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:19:34,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:19:34,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:19:34,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:19:34,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 446 transitions, 6305 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:19:34,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:19:34,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:19:34,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:19:36,726 INFO L124 PetriNetUnfolderBase]: 3480/5369 cut-off events. [2024-06-27 23:19:36,727 INFO L125 PetriNetUnfolderBase]: For 544180/544207 co-relation queries the response was YES. [2024-06-27 23:19:36,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49761 conditions, 5369 events. 3480/5369 cut-off events. For 544180/544207 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 29364 event pairs, 1006 based on Foata normal form. 7/5353 useless extension candidates. Maximal degree in co-relation 49649. Up to 4779 conditions per place. [2024-06-27 23:19:36,795 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 395 selfloop transitions, 106 changer transitions 0/508 dead transitions. [2024-06-27 23:19:36,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 508 transitions, 8411 flow [2024-06-27 23:19:36,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 23:19:36,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 23:19:36,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 241 transitions. [2024-06-27 23:19:36,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46705426356589147 [2024-06-27 23:19:36,797 INFO L175 Difference]: Start difference. First operand has 240 places, 446 transitions, 6305 flow. Second operand 12 states and 241 transitions. [2024-06-27 23:19:36,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 508 transitions, 8411 flow [2024-06-27 23:19:37,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 508 transitions, 8099 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-27 23:19:37,610 INFO L231 Difference]: Finished difference. Result has 244 places, 459 transitions, 6540 flow [2024-06-27 23:19:37,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6003, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6540, PETRI_PLACES=244, PETRI_TRANSITIONS=459} [2024-06-27 23:19:37,611 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 200 predicate places. [2024-06-27 23:19:37,611 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 459 transitions, 6540 flow [2024-06-27 23:19:37,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:19:37,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:19:37,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:19:37,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 23:19:37,611 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:19:37,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:19:37,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1438240976, now seen corresponding path program 5 times [2024-06-27 23:19:37,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:19:37,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754830854] [2024-06-27 23:19:37,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:19:37,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:19:37,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:19:40,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:19:40,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:19:40,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754830854] [2024-06-27 23:19:40,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754830854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:19:40,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:19:40,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:19:40,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403745441] [2024-06-27 23:19:40,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:19:40,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:19:40,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:19:40,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:19:40,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:19:40,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:19:40,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 459 transitions, 6540 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:19:40,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:19:40,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:19:40,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:19:42,219 INFO L124 PetriNetUnfolderBase]: 3498/5391 cut-off events. [2024-06-27 23:19:42,219 INFO L125 PetriNetUnfolderBase]: For 546097/546125 co-relation queries the response was YES. [2024-06-27 23:19:42,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50364 conditions, 5391 events. 3498/5391 cut-off events. For 546097/546125 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 29460 event pairs, 1042 based on Foata normal form. 5/5370 useless extension candidates. Maximal degree in co-relation 50252. Up to 4898 conditions per place. [2024-06-27 23:19:42,286 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 394 selfloop transitions, 94 changer transitions 0/495 dead transitions. [2024-06-27 23:19:42,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 495 transitions, 7864 flow [2024-06-27 23:19:42,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:19:42,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:19:42,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-27 23:19:42,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49127906976744184 [2024-06-27 23:19:42,288 INFO L175 Difference]: Start difference. First operand has 244 places, 459 transitions, 6540 flow. Second operand 8 states and 169 transitions. [2024-06-27 23:19:42,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 495 transitions, 7864 flow [2024-06-27 23:19:43,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 495 transitions, 7684 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-27 23:19:43,122 INFO L231 Difference]: Finished difference. Result has 246 places, 465 transitions, 6697 flow [2024-06-27 23:19:43,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6360, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6697, PETRI_PLACES=246, PETRI_TRANSITIONS=465} [2024-06-27 23:19:43,123 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 202 predicate places. [2024-06-27 23:19:43,123 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 465 transitions, 6697 flow [2024-06-27 23:19:43,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:19:43,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:19:43,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:19:43,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 23:19:43,123 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:19:43,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:19:43,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1085134410, now seen corresponding path program 6 times [2024-06-27 23:19:43,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:19:43,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942617921] [2024-06-27 23:19:43,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:19:43,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:19:43,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:19:46,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:19:46,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:19:46,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942617921] [2024-06-27 23:19:46,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942617921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:19:46,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:19:46,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:19:46,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304454694] [2024-06-27 23:19:46,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:19:46,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:19:46,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:19:46,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:19:46,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:19:46,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:19:46,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 465 transitions, 6697 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:19:46,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:19:46,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:19:46,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:19:47,761 INFO L124 PetriNetUnfolderBase]: 3490/5378 cut-off events. [2024-06-27 23:19:47,761 INFO L125 PetriNetUnfolderBase]: For 558857/558885 co-relation queries the response was YES. [2024-06-27 23:19:47,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50485 conditions, 5378 events. 3490/5378 cut-off events. For 558857/558885 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 29399 event pairs, 1039 based on Foata normal form. 5/5357 useless extension candidates. Maximal degree in co-relation 50371. Up to 4812 conditions per place. [2024-06-27 23:19:47,826 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 375 selfloop transitions, 114 changer transitions 0/496 dead transitions. [2024-06-27 23:19:47,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 496 transitions, 7914 flow [2024-06-27 23:19:47,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:19:47,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:19:47,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 23:19:47,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-27 23:19:47,827 INFO L175 Difference]: Start difference. First operand has 246 places, 465 transitions, 6697 flow. Second operand 9 states and 173 transitions. [2024-06-27 23:19:47,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 496 transitions, 7914 flow [2024-06-27 23:19:48,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 496 transitions, 7609 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-06-27 23:19:48,591 INFO L231 Difference]: Finished difference. Result has 248 places, 465 transitions, 6641 flow [2024-06-27 23:19:48,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6392, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6641, PETRI_PLACES=248, PETRI_TRANSITIONS=465} [2024-06-27 23:19:48,592 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 204 predicate places. [2024-06-27 23:19:48,592 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 465 transitions, 6641 flow [2024-06-27 23:19:48,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:19:48,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:19:48,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:19:48,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 23:19:48,592 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)] === [2024-06-27 23:19:48,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:19:48,593 INFO L85 PathProgramCache]: Analyzing trace with hash 689305802, now seen corresponding path program 7 times [2024-06-27 23:19:48,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:19:48,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548002616] [2024-06-27 23:19:48,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:19:48,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:19:48,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:19:51,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:19:51,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:19:51,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548002616] [2024-06-27 23:19:51,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548002616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:19:51,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:19:51,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:19:51,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979475818] [2024-06-27 23:19:51,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:19:51,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:19:51,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:19:51,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:19:51,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:19:51,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:19:51,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 465 transitions, 6641 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:19:51,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:19:51,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:19:51,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:19:53,201 INFO L124 PetriNetUnfolderBase]: 3495/5394 cut-off events. [2024-06-27 23:19:53,201 INFO L125 PetriNetUnfolderBase]: For 549071/549105 co-relation queries the response was YES. [2024-06-27 23:19:53,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50306 conditions, 5394 events. 3495/5394 cut-off events. For 549071/549105 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 29484 event pairs, 974 based on Foata normal form. 14/5390 useless extension candidates. Maximal degree in co-relation 50191. Up to 4669 conditions per place. [2024-06-27 23:19:53,267 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 329 selfloop transitions, 165 changer transitions 0/501 dead transitions. [2024-06-27 23:19:53,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 501 transitions, 8038 flow [2024-06-27 23:19:53,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:19:53,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:19:53,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-27 23:19:53,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5058139534883721 [2024-06-27 23:19:53,269 INFO L175 Difference]: Start difference. First operand has 248 places, 465 transitions, 6641 flow. Second operand 8 states and 174 transitions. [2024-06-27 23:19:53,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 501 transitions, 8038 flow [2024-06-27 23:19:54,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 501 transitions, 7722 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-27 23:19:54,069 INFO L231 Difference]: Finished difference. Result has 247 places, 468 transitions, 6742 flow [2024-06-27 23:19:54,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6325, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6742, PETRI_PLACES=247, PETRI_TRANSITIONS=468} [2024-06-27 23:19:54,069 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 203 predicate places. [2024-06-27 23:19:54,070 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 468 transitions, 6742 flow [2024-06-27 23:19:54,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:19:54,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:19:54,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:19:54,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 23:19:54,070 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)] === [2024-06-27 23:19:54,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:19:54,071 INFO L85 PathProgramCache]: Analyzing trace with hash 689301028, now seen corresponding path program 5 times [2024-06-27 23:19:54,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:19:54,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60937635] [2024-06-27 23:19:54,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:19:54,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:19:54,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:19:57,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:19:57,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:19:57,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60937635] [2024-06-27 23:19:57,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60937635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:19:57,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:19:57,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:19:57,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197283566] [2024-06-27 23:19:57,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:19:57,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:19:57,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:19:57,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:19:57,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:19:57,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:19:57,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 468 transitions, 6742 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:19:57,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:19:57,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:19:57,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:19:59,241 INFO L124 PetriNetUnfolderBase]: 3511/5412 cut-off events. [2024-06-27 23:19:59,241 INFO L125 PetriNetUnfolderBase]: For 552971/553005 co-relation queries the response was YES. [2024-06-27 23:19:59,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50889 conditions, 5412 events. 3511/5412 cut-off events. For 552971/553005 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 29522 event pairs, 970 based on Foata normal form. 16/5411 useless extension candidates. Maximal degree in co-relation 50775. Up to 4888 conditions per place. [2024-06-27 23:19:59,312 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 398 selfloop transitions, 96 changer transitions 0/501 dead transitions. [2024-06-27 23:19:59,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 501 transitions, 8075 flow [2024-06-27 23:19:59,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:19:59,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:19:59,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 23:19:59,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 23:19:59,314 INFO L175 Difference]: Start difference. First operand has 247 places, 468 transitions, 6742 flow. Second operand 9 states and 172 transitions. [2024-06-27 23:19:59,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 501 transitions, 8075 flow [2024-06-27 23:19:59,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 501 transitions, 7688 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 23:19:59,971 INFO L231 Difference]: Finished difference. Result has 250 places, 470 transitions, 6622 flow [2024-06-27 23:19:59,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6355, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6622, PETRI_PLACES=250, PETRI_TRANSITIONS=470} [2024-06-27 23:19:59,972 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 206 predicate places. [2024-06-27 23:19:59,972 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 470 transitions, 6622 flow [2024-06-27 23:19:59,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:19:59,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:19:59,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:19:59,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 23:19:59,973 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)] === [2024-06-27 23:19:59,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:19:59,973 INFO L85 PathProgramCache]: Analyzing trace with hash 689301152, now seen corresponding path program 8 times [2024-06-27 23:19:59,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:19:59,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892583454] [2024-06-27 23:19:59,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:19:59,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:19:59,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:20:02,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:20:02,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:20:02,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892583454] [2024-06-27 23:20:02,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892583454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:20:02,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:20:02,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:20:02,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254332470] [2024-06-27 23:20:02,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:20:02,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:20:02,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:20:02,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:20:02,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:20:03,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:20:03,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 470 transitions, 6622 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:20:03,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:20:03,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:20:03,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:20:04,678 INFO L124 PetriNetUnfolderBase]: 3539/5461 cut-off events. [2024-06-27 23:20:04,678 INFO L125 PetriNetUnfolderBase]: For 574706/574729 co-relation queries the response was YES. [2024-06-27 23:20:04,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51706 conditions, 5461 events. 3539/5461 cut-off events. For 574706/574729 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 29907 event pairs, 976 based on Foata normal form. 14/5458 useless extension candidates. Maximal degree in co-relation 51590. Up to 4684 conditions per place. [2024-06-27 23:20:04,750 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 332 selfloop transitions, 171 changer transitions 0/510 dead transitions. [2024-06-27 23:20:04,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 510 transitions, 8317 flow [2024-06-27 23:20:04,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:20:04,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:20:04,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-27 23:20:04,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625322997416021 [2024-06-27 23:20:04,752 INFO L175 Difference]: Start difference. First operand has 250 places, 470 transitions, 6622 flow. Second operand 9 states and 179 transitions. [2024-06-27 23:20:04,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 510 transitions, 8317 flow [2024-06-27 23:20:05,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 510 transitions, 8068 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-27 23:20:05,573 INFO L231 Difference]: Finished difference. Result has 252 places, 476 transitions, 6885 flow [2024-06-27 23:20:05,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6373, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6885, PETRI_PLACES=252, PETRI_TRANSITIONS=476} [2024-06-27 23:20:05,574 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 208 predicate places. [2024-06-27 23:20:05,574 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 476 transitions, 6885 flow [2024-06-27 23:20:05,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:20:05,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:20:05,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:20:05,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 23:20:05,574 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:20:05,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:20:05,575 INFO L85 PathProgramCache]: Analyzing trace with hash 689478968, now seen corresponding path program 4 times [2024-06-27 23:20:05,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:20:05,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10574737] [2024-06-27 23:20:05,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:20:05,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:20:05,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:20:08,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:20:08,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:20:08,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10574737] [2024-06-27 23:20:08,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10574737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:20:08,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:20:08,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:20:08,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605064176] [2024-06-27 23:20:08,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:20:08,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:20:08,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:20:08,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:20:08,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:20:08,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:20:08,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 476 transitions, 6885 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:20:08,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:20:08,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:20:08,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:20:10,203 INFO L124 PetriNetUnfolderBase]: 3561/5490 cut-off events. [2024-06-27 23:20:10,203 INFO L125 PetriNetUnfolderBase]: For 598780/598803 co-relation queries the response was YES. [2024-06-27 23:20:10,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52784 conditions, 5490 events. 3561/5490 cut-off events. For 598780/598803 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 30124 event pairs, 973 based on Foata normal form. 12/5481 useless extension candidates. Maximal degree in co-relation 52667. Up to 4491 conditions per place. [2024-06-27 23:20:10,270 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 307 selfloop transitions, 202 changer transitions 0/516 dead transitions. [2024-06-27 23:20:10,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 516 transitions, 8755 flow [2024-06-27 23:20:10,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:20:10,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:20:10,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-27 23:20:10,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4790697674418605 [2024-06-27 23:20:10,272 INFO L175 Difference]: Start difference. First operand has 252 places, 476 transitions, 6885 flow. Second operand 10 states and 206 transitions. [2024-06-27 23:20:10,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 516 transitions, 8755 flow [2024-06-27 23:20:11,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 516 transitions, 8468 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-27 23:20:11,138 INFO L231 Difference]: Finished difference. Result has 257 places, 479 transitions, 7059 flow [2024-06-27 23:20:11,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6598, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7059, PETRI_PLACES=257, PETRI_TRANSITIONS=479} [2024-06-27 23:20:11,139 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 213 predicate places. [2024-06-27 23:20:11,139 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 479 transitions, 7059 flow [2024-06-27 23:20:11,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:20:11,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:20:11,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:20:11,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 23:20:11,140 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:20:11,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:20:11,140 INFO L85 PathProgramCache]: Analyzing trace with hash 689485478, now seen corresponding path program 5 times [2024-06-27 23:20:11,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:20:11,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151501960] [2024-06-27 23:20:11,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:20:11,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:20:11,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:20:13,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:20:13,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:20:13,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151501960] [2024-06-27 23:20:13,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151501960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:20:13,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:20:13,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:20:13,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828039211] [2024-06-27 23:20:13,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:20:13,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:20:13,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:20:13,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:20:13,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:20:13,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:20:13,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 479 transitions, 7059 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:20:13,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:20:13,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:20:13,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:20:15,585 INFO L124 PetriNetUnfolderBase]: 3553/5479 cut-off events. [2024-06-27 23:20:15,585 INFO L125 PetriNetUnfolderBase]: For 615163/615186 co-relation queries the response was YES. [2024-06-27 23:20:15,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53336 conditions, 5479 events. 3553/5479 cut-off events. For 615163/615186 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 30087 event pairs, 973 based on Foata normal form. 13/5471 useless extension candidates. Maximal degree in co-relation 53217. Up to 4483 conditions per place. [2024-06-27 23:20:15,772 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 297 selfloop transitions, 210 changer transitions 0/514 dead transitions. [2024-06-27 23:20:15,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 514 transitions, 8663 flow [2024-06-27 23:20:15,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:20:15,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:20:15,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-27 23:20:15,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4720930232558139 [2024-06-27 23:20:15,777 INFO L175 Difference]: Start difference. First operand has 257 places, 479 transitions, 7059 flow. Second operand 10 states and 203 transitions. [2024-06-27 23:20:15,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 514 transitions, 8663 flow [2024-06-27 23:20:16,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 514 transitions, 8187 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-27 23:20:16,523 INFO L231 Difference]: Finished difference. Result has 259 places, 479 transitions, 7012 flow [2024-06-27 23:20:16,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6583, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7012, PETRI_PLACES=259, PETRI_TRANSITIONS=479} [2024-06-27 23:20:16,524 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 215 predicate places. [2024-06-27 23:20:16,524 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 479 transitions, 7012 flow [2024-06-27 23:20:16,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:20:16,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:20:16,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:20:16,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 23:20:16,525 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:20:16,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:20:16,527 INFO L85 PathProgramCache]: Analyzing trace with hash 689478782, now seen corresponding path program 9 times [2024-06-27 23:20:16,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:20:16,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805428067] [2024-06-27 23:20:16,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:20:16,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:20:16,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:20:19,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:20:19,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:20:19,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805428067] [2024-06-27 23:20:19,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805428067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:20:19,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:20:19,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:20:19,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692398814] [2024-06-27 23:20:19,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:20:19,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:20:19,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:20:19,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:20:19,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:20:19,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:20:19,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 479 transitions, 7012 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:20:19,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:20:19,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:20:19,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:20:21,196 INFO L124 PetriNetUnfolderBase]: 3548/5475 cut-off events. [2024-06-27 23:20:21,196 INFO L125 PetriNetUnfolderBase]: For 629688/629711 co-relation queries the response was YES. [2024-06-27 23:20:21,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53456 conditions, 5475 events. 3548/5475 cut-off events. For 629688/629711 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 29979 event pairs, 974 based on Foata normal form. 14/5471 useless extension candidates. Maximal degree in co-relation 53336. Up to 4748 conditions per place. [2024-06-27 23:20:21,264 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 332 selfloop transitions, 173 changer transitions 0/512 dead transitions. [2024-06-27 23:20:21,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 512 transitions, 8371 flow [2024-06-27 23:20:21,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:20:21,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:20:21,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-27 23:20:21,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.502906976744186 [2024-06-27 23:20:21,266 INFO L175 Difference]: Start difference. First operand has 259 places, 479 transitions, 7012 flow. Second operand 8 states and 173 transitions. [2024-06-27 23:20:21,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 512 transitions, 8371 flow [2024-06-27 23:20:21,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 512 transitions, 7901 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-27 23:20:21,922 INFO L231 Difference]: Finished difference. Result has 258 places, 479 transitions, 6909 flow [2024-06-27 23:20:21,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6552, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6909, PETRI_PLACES=258, PETRI_TRANSITIONS=479} [2024-06-27 23:20:21,932 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 214 predicate places. [2024-06-27 23:20:21,932 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 479 transitions, 6909 flow [2024-06-27 23:20:21,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:20:21,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:20:21,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:20:21,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 23:20:21,933 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:20:21,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:20:21,934 INFO L85 PathProgramCache]: Analyzing trace with hash 710705746, now seen corresponding path program 1 times [2024-06-27 23:20:21,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:20:21,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023410566] [2024-06-27 23:20:21,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:20:21,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:20:21,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:20:23,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:20:23,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:20:23,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023410566] [2024-06-27 23:20:23,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023410566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:20:23,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:20:23,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:20:23,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569493901] [2024-06-27 23:20:23,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:20:23,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:20:23,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:20:23,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:20:23,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:20:23,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:20:23,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 479 transitions, 6909 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:20:23,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:20:23,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:20:23,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:20:25,055 INFO L124 PetriNetUnfolderBase]: 3632/5579 cut-off events. [2024-06-27 23:20:25,056 INFO L125 PetriNetUnfolderBase]: For 656158/656187 co-relation queries the response was YES. [2024-06-27 23:20:25,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53730 conditions, 5579 events. 3632/5579 cut-off events. For 656158/656187 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 30115 event pairs, 1136 based on Foata normal form. 19/5589 useless extension candidates. Maximal degree in co-relation 53610. Up to 5048 conditions per place. [2024-06-27 23:20:25,140 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 378 selfloop transitions, 40 changer transitions 0/503 dead transitions. [2024-06-27 23:20:25,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 503 transitions, 8029 flow [2024-06-27 23:20:25,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:20:25,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:20:25,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-27 23:20:25,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4806201550387597 [2024-06-27 23:20:25,141 INFO L175 Difference]: Start difference. First operand has 258 places, 479 transitions, 6909 flow. Second operand 6 states and 124 transitions. [2024-06-27 23:20:25,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 503 transitions, 8029 flow [2024-06-27 23:20:26,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 503 transitions, 7659 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 23:20:26,334 INFO L231 Difference]: Finished difference. Result has 257 places, 485 transitions, 6701 flow [2024-06-27 23:20:26,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6539, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6701, PETRI_PLACES=257, PETRI_TRANSITIONS=485} [2024-06-27 23:20:26,335 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 213 predicate places. [2024-06-27 23:20:26,335 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 485 transitions, 6701 flow [2024-06-27 23:20:26,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:20:26,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:20:26,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:20:26,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 23:20:26,336 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)] === [2024-06-27 23:20:26,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:20:26,336 INFO L85 PathProgramCache]: Analyzing trace with hash -549685316, now seen corresponding path program 6 times [2024-06-27 23:20:26,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:20:26,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826921368] [2024-06-27 23:20:26,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:20:26,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:20:26,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:20:28,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:20:28,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:20:28,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826921368] [2024-06-27 23:20:28,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826921368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:20:28,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:20:28,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:20:28,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998891361] [2024-06-27 23:20:28,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:20:28,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:20:28,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:20:28,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:20:28,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:20:28,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:20:28,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 485 transitions, 6701 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:20:28,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:20:28,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:20:28,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:20:29,927 INFO L124 PetriNetUnfolderBase]: 3631/5591 cut-off events. [2024-06-27 23:20:29,927 INFO L125 PetriNetUnfolderBase]: For 691201/691226 co-relation queries the response was YES. [2024-06-27 23:20:29,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54823 conditions, 5591 events. 3631/5591 cut-off events. For 691201/691226 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 30714 event pairs, 1254 based on Foata normal form. 8/5564 useless extension candidates. Maximal degree in co-relation 54702. Up to 5156 conditions per place. [2024-06-27 23:20:29,995 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 452 selfloop transitions, 63 changer transitions 0/524 dead transitions. [2024-06-27 23:20:29,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 524 transitions, 8053 flow [2024-06-27 23:20:29,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:20:29,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:20:30,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 23:20:30,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-27 23:20:30,006 INFO L175 Difference]: Start difference. First operand has 257 places, 485 transitions, 6701 flow. Second operand 9 states and 169 transitions. [2024-06-27 23:20:30,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 524 transitions, 8053 flow [2024-06-27 23:20:30,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 524 transitions, 7953 flow, removed 35 selfloop flow, removed 2 redundant places. [2024-06-27 23:20:30,885 INFO L231 Difference]: Finished difference. Result has 264 places, 498 transitions, 6969 flow [2024-06-27 23:20:30,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6601, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6969, PETRI_PLACES=264, PETRI_TRANSITIONS=498} [2024-06-27 23:20:30,886 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 220 predicate places. [2024-06-27 23:20:30,886 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 498 transitions, 6969 flow [2024-06-27 23:20:30,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:20:30,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:20:30,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:20:30,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 23:20:30,887 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)] === [2024-06-27 23:20:30,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:20:30,887 INFO L85 PathProgramCache]: Analyzing trace with hash -434394146, now seen corresponding path program 7 times [2024-06-27 23:20:30,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:20:30,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379141938] [2024-06-27 23:20:30,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:20:30,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:20:30,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:20:32,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:20:32,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:20:32,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379141938] [2024-06-27 23:20:32,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379141938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:20:32,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:20:32,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:20:32,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236954531] [2024-06-27 23:20:32,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:20:32,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:20:32,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:20:32,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:20:32,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:20:32,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:20:32,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 498 transitions, 6969 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:20:32,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:20:32,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:20:32,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:20:34,702 INFO L124 PetriNetUnfolderBase]: 3772/5810 cut-off events. [2024-06-27 23:20:34,702 INFO L125 PetriNetUnfolderBase]: For 732310/732337 co-relation queries the response was YES. [2024-06-27 23:20:34,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57753 conditions, 5810 events. 3772/5810 cut-off events. For 732310/732337 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 32138 event pairs, 1263 based on Foata normal form. 6/5776 useless extension candidates. Maximal degree in co-relation 57629. Up to 4789 conditions per place. [2024-06-27 23:20:34,780 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 394 selfloop transitions, 169 changer transitions 0/572 dead transitions. [2024-06-27 23:20:34,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 572 transitions, 9570 flow [2024-06-27 23:20:34,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:20:34,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:20:34,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-27 23:20:34,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48320413436692505 [2024-06-27 23:20:34,782 INFO L175 Difference]: Start difference. First operand has 264 places, 498 transitions, 6969 flow. Second operand 9 states and 187 transitions. [2024-06-27 23:20:34,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 572 transitions, 9570 flow [2024-06-27 23:20:35,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 572 transitions, 9353 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-27 23:20:35,837 INFO L231 Difference]: Finished difference. Result has 267 places, 521 transitions, 7654 flow [2024-06-27 23:20:35,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6752, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7654, PETRI_PLACES=267, PETRI_TRANSITIONS=521} [2024-06-27 23:20:35,838 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 223 predicate places. [2024-06-27 23:20:35,838 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 521 transitions, 7654 flow [2024-06-27 23:20:35,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:20:35,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:20:35,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:20:35,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 23:20:35,839 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)] === [2024-06-27 23:20:35,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:20:35,840 INFO L85 PathProgramCache]: Analyzing trace with hash 266646930, now seen corresponding path program 8 times [2024-06-27 23:20:35,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:20:35,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409489407] [2024-06-27 23:20:35,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:20:35,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:20:35,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:20:37,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:20:37,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:20:37,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409489407] [2024-06-27 23:20:37,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409489407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:20:37,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:20:37,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:20:37,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014397539] [2024-06-27 23:20:37,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:20:37,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:20:37,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:20:37,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:20:37,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:20:38,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:20:38,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 521 transitions, 7654 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:20:38,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:20:38,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:20:38,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:20:39,937 INFO L124 PetriNetUnfolderBase]: 3800/5852 cut-off events. [2024-06-27 23:20:39,938 INFO L125 PetriNetUnfolderBase]: For 758656/758683 co-relation queries the response was YES. [2024-06-27 23:20:39,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59254 conditions, 5852 events. 3800/5852 cut-off events. For 758656/758683 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 32493 event pairs, 1264 based on Foata normal form. 6/5817 useless extension candidates. Maximal degree in co-relation 59128. Up to 4811 conditions per place. [2024-06-27 23:20:40,014 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 393 selfloop transitions, 180 changer transitions 0/582 dead transitions. [2024-06-27 23:20:40,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 582 transitions, 10058 flow [2024-06-27 23:20:40,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:20:40,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:20:40,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-27 23:20:40,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4806201550387597 [2024-06-27 23:20:40,016 INFO L175 Difference]: Start difference. First operand has 267 places, 521 transitions, 7654 flow. Second operand 9 states and 186 transitions. [2024-06-27 23:20:40,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 582 transitions, 10058 flow [2024-06-27 23:20:40,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 582 transitions, 9736 flow, removed 117 selfloop flow, removed 4 redundant places. [2024-06-27 23:20:40,864 INFO L231 Difference]: Finished difference. Result has 272 places, 528 transitions, 7923 flow [2024-06-27 23:20:40,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7382, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7923, PETRI_PLACES=272, PETRI_TRANSITIONS=528} [2024-06-27 23:20:40,865 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 228 predicate places. [2024-06-27 23:20:40,865 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 528 transitions, 7923 flow [2024-06-27 23:20:40,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:20:40,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:20:40,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:20:40,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 23:20:40,866 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)] === [2024-06-27 23:20:40,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:20:40,866 INFO L85 PathProgramCache]: Analyzing trace with hash 266653440, now seen corresponding path program 9 times [2024-06-27 23:20:40,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:20:40,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576483896] [2024-06-27 23:20:40,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:20:40,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:20:40,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:20:42,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:20:42,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:20:42,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576483896] [2024-06-27 23:20:42,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576483896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:20:42,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:20:42,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:20:42,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493899737] [2024-06-27 23:20:42,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:20:42,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:20:42,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:20:42,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:20:42,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:20:42,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:20:42,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 528 transitions, 7923 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:20:42,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:20:42,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:20:42,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:20:44,388 INFO L124 PetriNetUnfolderBase]: 3787/5834 cut-off events. [2024-06-27 23:20:44,388 INFO L125 PetriNetUnfolderBase]: For 768549/768576 co-relation queries the response was YES. [2024-06-27 23:20:44,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59374 conditions, 5834 events. 3787/5834 cut-off events. For 768549/768576 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 32302 event pairs, 1262 based on Foata normal form. 5/5798 useless extension candidates. Maximal degree in co-relation 59246. Up to 4801 conditions per place. [2024-06-27 23:20:44,465 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 379 selfloop transitions, 187 changer transitions 0/575 dead transitions. [2024-06-27 23:20:44,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 575 transitions, 9754 flow [2024-06-27 23:20:44,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:20:44,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:20:44,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-27 23:20:44,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-27 23:20:44,467 INFO L175 Difference]: Start difference. First operand has 272 places, 528 transitions, 7923 flow. Second operand 9 states and 182 transitions. [2024-06-27 23:20:44,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 575 transitions, 9754 flow [2024-06-27 23:20:45,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 575 transitions, 9295 flow, removed 77 selfloop flow, removed 6 redundant places. [2024-06-27 23:20:45,346 INFO L231 Difference]: Finished difference. Result has 275 places, 528 transitions, 7855 flow [2024-06-27 23:20:45,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7464, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7855, PETRI_PLACES=275, PETRI_TRANSITIONS=528} [2024-06-27 23:20:45,347 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 231 predicate places. [2024-06-27 23:20:45,347 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 528 transitions, 7855 flow [2024-06-27 23:20:45,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:20:45,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:20:45,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:20:45,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 23:20:45,347 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:20:45,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:20:45,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1476279526, now seen corresponding path program 1 times [2024-06-27 23:20:45,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:20:45,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218491037] [2024-06-27 23:20:45,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:20:45,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:20:45,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:20:47,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:20:47,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:20:47,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218491037] [2024-06-27 23:20:47,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218491037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:20:47,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:20:47,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:20:47,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664063970] [2024-06-27 23:20:47,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:20:47,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:20:47,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:20:47,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:20:47,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:20:47,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:20:47,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 528 transitions, 7855 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:20:47,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:20:47,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:20:47,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:20:48,605 INFO L124 PetriNetUnfolderBase]: 3928/6017 cut-off events. [2024-06-27 23:20:48,605 INFO L125 PetriNetUnfolderBase]: For 799653/799733 co-relation queries the response was YES. [2024-06-27 23:20:48,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60114 conditions, 6017 events. 3928/6017 cut-off events. For 799653/799733 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 33044 event pairs, 1464 based on Foata normal form. 34/5996 useless extension candidates. Maximal degree in co-relation 59985. Up to 5452 conditions per place. [2024-06-27 23:20:48,677 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 435 selfloop transitions, 38 changer transitions 0/558 dead transitions. [2024-06-27 23:20:48,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 558 transitions, 9254 flow [2024-06-27 23:20:48,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:20:48,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:20:48,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 23:20:48,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-27 23:20:48,678 INFO L175 Difference]: Start difference. First operand has 275 places, 528 transitions, 7855 flow. Second operand 7 states and 136 transitions. [2024-06-27 23:20:48,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 558 transitions, 9254 flow [2024-06-27 23:20:49,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 558 transitions, 8782 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-27 23:20:49,769 INFO L231 Difference]: Finished difference. Result has 273 places, 540 transitions, 7616 flow [2024-06-27 23:20:49,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7383, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7616, PETRI_PLACES=273, PETRI_TRANSITIONS=540} [2024-06-27 23:20:49,770 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 229 predicate places. [2024-06-27 23:20:49,770 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 540 transitions, 7616 flow [2024-06-27 23:20:49,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:20:49,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:20:49,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:20:49,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 23:20:49,770 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:20:49,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:20:49,771 INFO L85 PathProgramCache]: Analyzing trace with hash 90925378, now seen corresponding path program 2 times [2024-06-27 23:20:49,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:20:49,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462546396] [2024-06-27 23:20:49,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:20:49,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:20:49,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:20:51,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:20:51,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:20:51,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462546396] [2024-06-27 23:20:51,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462546396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:20:51,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:20:51,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:20:51,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006917479] [2024-06-27 23:20:51,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:20:51,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:20:51,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:20:51,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:20:51,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:20:51,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:20:51,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 540 transitions, 7616 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:20:51,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:20:51,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:20:51,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:20:52,743 INFO L124 PetriNetUnfolderBase]: 4094/6185 cut-off events. [2024-06-27 23:20:52,744 INFO L125 PetriNetUnfolderBase]: For 805146/805205 co-relation queries the response was YES. [2024-06-27 23:20:52,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61410 conditions, 6185 events. 4094/6185 cut-off events. For 805146/805205 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 33206 event pairs, 1534 based on Foata normal form. 22/6166 useless extension candidates. Maximal degree in co-relation 61279. Up to 5867 conditions per place. [2024-06-27 23:20:52,830 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 482 selfloop transitions, 31 changer transitions 0/552 dead transitions. [2024-06-27 23:20:52,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 552 transitions, 8830 flow [2024-06-27 23:20:52,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:20:52,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:20:52,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-27 23:20:52,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-27 23:20:52,831 INFO L175 Difference]: Start difference. First operand has 273 places, 540 transitions, 7616 flow. Second operand 6 states and 110 transitions. [2024-06-27 23:20:52,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 552 transitions, 8830 flow [2024-06-27 23:20:53,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 552 transitions, 8763 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-27 23:20:53,961 INFO L231 Difference]: Finished difference. Result has 277 places, 540 transitions, 7624 flow [2024-06-27 23:20:53,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7549, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7624, PETRI_PLACES=277, PETRI_TRANSITIONS=540} [2024-06-27 23:20:53,961 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 233 predicate places. [2024-06-27 23:20:53,961 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 540 transitions, 7624 flow [2024-06-27 23:20:53,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:20:53,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:20:53,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:20:53,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 23:20:53,962 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)] === [2024-06-27 23:20:53,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:20:53,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1621392310, now seen corresponding path program 10 times [2024-06-27 23:20:53,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:20:53,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564178725] [2024-06-27 23:20:53,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:20:53,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:20:54,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:20:55,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:20:55,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:20:55,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564178725] [2024-06-27 23:20:55,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564178725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:20:55,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:20:55,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:20:55,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961703292] [2024-06-27 23:20:55,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:20:55,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:20:55,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:20:55,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:20:55,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:20:55,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:20:55,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 540 transitions, 7624 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:20:55,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:20:55,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:20:55,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:20:57,626 INFO L124 PetriNetUnfolderBase]: 4002/6157 cut-off events. [2024-06-27 23:20:57,626 INFO L125 PetriNetUnfolderBase]: For 873015/873040 co-relation queries the response was YES. [2024-06-27 23:20:57,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63802 conditions, 6157 events. 4002/6157 cut-off events. For 873015/873040 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 34439 event pairs, 1303 based on Foata normal form. 5/6123 useless extension candidates. Maximal degree in co-relation 63669. Up to 5541 conditions per place. [2024-06-27 23:20:57,718 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 536 selfloop transitions, 61 changer transitions 0/608 dead transitions. [2024-06-27 23:20:57,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 608 transitions, 10444 flow [2024-06-27 23:20:57,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:20:57,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:20:57,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-27 23:20:57,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-27 23:20:57,720 INFO L175 Difference]: Start difference. First operand has 277 places, 540 transitions, 7624 flow. Second operand 9 states and 177 transitions. [2024-06-27 23:20:57,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 608 transitions, 10444 flow [2024-06-27 23:20:58,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 608 transitions, 10398 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-27 23:20:58,727 INFO L231 Difference]: Finished difference. Result has 282 places, 561 transitions, 8352 flow [2024-06-27 23:20:58,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7578, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8352, PETRI_PLACES=282, PETRI_TRANSITIONS=561} [2024-06-27 23:20:58,728 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 238 predicate places. [2024-06-27 23:20:58,728 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 561 transitions, 8352 flow [2024-06-27 23:20:58,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:20:58,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:20:58,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:20:58,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 23:20:58,729 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)] === [2024-06-27 23:20:58,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:20:58,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1080753226, now seen corresponding path program 10 times [2024-06-27 23:20:58,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:20:58,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536642853] [2024-06-27 23:20:58,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:20:58,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:20:58,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:21:00,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:21:00,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:21:00,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536642853] [2024-06-27 23:21:00,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536642853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:21:00,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:21:00,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:21:00,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950108160] [2024-06-27 23:21:00,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:21:00,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:21:00,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:21:00,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:21:00,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:21:01,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:21:01,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 561 transitions, 8352 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:21:01,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:21:01,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:21:01,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:21:02,833 INFO L124 PetriNetUnfolderBase]: 4011/6169 cut-off events. [2024-06-27 23:21:02,834 INFO L125 PetriNetUnfolderBase]: For 894744/894773 co-relation queries the response was YES. [2024-06-27 23:21:02,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64558 conditions, 6169 events. 4011/6169 cut-off events. For 894744/894773 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 34568 event pairs, 1307 based on Foata normal form. 2/6125 useless extension candidates. Maximal degree in co-relation 64424. Up to 5765 conditions per place. [2024-06-27 23:21:02,916 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 551 selfloop transitions, 28 changer transitions 0/590 dead transitions. [2024-06-27 23:21:02,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 590 transitions, 9808 flow [2024-06-27 23:21:02,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:21:02,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:21:02,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 23:21:02,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-27 23:21:02,917 INFO L175 Difference]: Start difference. First operand has 282 places, 561 transitions, 8352 flow. Second operand 9 states and 166 transitions. [2024-06-27 23:21:02,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 590 transitions, 9808 flow [2024-06-27 23:21:03,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 590 transitions, 9545 flow, removed 121 selfloop flow, removed 4 redundant places. [2024-06-27 23:21:03,935 INFO L231 Difference]: Finished difference. Result has 287 places, 564 transitions, 8246 flow [2024-06-27 23:21:03,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8089, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8246, PETRI_PLACES=287, PETRI_TRANSITIONS=564} [2024-06-27 23:21:03,936 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 243 predicate places. [2024-06-27 23:21:03,936 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 564 transitions, 8246 flow [2024-06-27 23:21:03,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:21:03,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:21:03,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:21:03,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 23:21:03,937 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)] === [2024-06-27 23:21:03,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:21:03,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1308827170, now seen corresponding path program 11 times [2024-06-27 23:21:03,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:21:03,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191285163] [2024-06-27 23:21:03,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:21:03,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:21:03,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:21:05,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:21:05,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:21:05,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191285163] [2024-06-27 23:21:05,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191285163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:21:05,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:21:05,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:21:05,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415992975] [2024-06-27 23:21:05,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:21:05,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:21:05,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:21:05,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:21:05,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:21:05,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:21:05,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 564 transitions, 8246 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:21:05,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:21:05,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:21:05,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:21:07,876 INFO L124 PetriNetUnfolderBase]: 4039/6208 cut-off events. [2024-06-27 23:21:07,876 INFO L125 PetriNetUnfolderBase]: For 924139/924169 co-relation queries the response was YES. [2024-06-27 23:21:07,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65298 conditions, 6208 events. 4039/6208 cut-off events. For 924139/924169 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 34750 event pairs, 1305 based on Foata normal form. 6/6169 useless extension candidates. Maximal degree in co-relation 65162. Up to 5423 conditions per place. [2024-06-27 23:21:07,972 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 493 selfloop transitions, 108 changer transitions 0/612 dead transitions. [2024-06-27 23:21:07,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 612 transitions, 10373 flow [2024-06-27 23:21:07,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:21:07,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:21:07,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-27 23:21:07,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-27 23:21:07,974 INFO L175 Difference]: Start difference. First operand has 287 places, 564 transitions, 8246 flow. Second operand 9 states and 177 transitions. [2024-06-27 23:21:07,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 612 transitions, 10373 flow [2024-06-27 23:21:09,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 612 transitions, 10242 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-27 23:21:09,215 INFO L231 Difference]: Finished difference. Result has 289 places, 571 transitions, 8566 flow [2024-06-27 23:21:09,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8115, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8566, PETRI_PLACES=289, PETRI_TRANSITIONS=571} [2024-06-27 23:21:09,216 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 245 predicate places. [2024-06-27 23:21:09,216 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 571 transitions, 8566 flow [2024-06-27 23:21:09,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:21:09,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:21:09,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:21:09,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 23:21:09,217 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)] === [2024-06-27 23:21:09,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:21:09,217 INFO L85 PathProgramCache]: Analyzing trace with hash 392028586, now seen corresponding path program 11 times [2024-06-27 23:21:09,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:21:09,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054977266] [2024-06-27 23:21:09,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:21:09,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:21:09,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:21:11,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:21:11,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:21:11,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054977266] [2024-06-27 23:21:11,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054977266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:21:11,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:21:11,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:21:11,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373042548] [2024-06-27 23:21:11,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:21:11,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:21:11,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:21:11,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:21:11,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:21:11,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:21:11,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 571 transitions, 8566 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:21:11,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:21:11,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:21:11,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:21:13,660 INFO L124 PetriNetUnfolderBase]: 4050/6227 cut-off events. [2024-06-27 23:21:13,660 INFO L125 PetriNetUnfolderBase]: For 942976/943006 co-relation queries the response was YES. [2024-06-27 23:21:13,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66106 conditions, 6227 events. 4050/6227 cut-off events. For 942976/943006 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 34878 event pairs, 1308 based on Foata normal form. 2/6181 useless extension candidates. Maximal degree in co-relation 65969. Up to 5754 conditions per place. [2024-06-27 23:21:13,740 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 536 selfloop transitions, 55 changer transitions 0/602 dead transitions. [2024-06-27 23:21:13,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 602 transitions, 10083 flow [2024-06-27 23:21:13,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:21:13,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:21:13,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-27 23:21:13,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41627906976744183 [2024-06-27 23:21:13,741 INFO L175 Difference]: Start difference. First operand has 289 places, 571 transitions, 8566 flow. Second operand 10 states and 179 transitions. [2024-06-27 23:21:13,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 602 transitions, 10083 flow [2024-06-27 23:21:15,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 602 transitions, 9618 flow, removed 114 selfloop flow, removed 7 redundant places. [2024-06-27 23:21:15,075 INFO L231 Difference]: Finished difference. Result has 292 places, 574 transitions, 8318 flow [2024-06-27 23:21:15,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8101, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8318, PETRI_PLACES=292, PETRI_TRANSITIONS=574} [2024-06-27 23:21:15,076 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 248 predicate places. [2024-06-27 23:21:15,076 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 574 transitions, 8318 flow [2024-06-27 23:21:15,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:21:15,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:21:15,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:21:15,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 23:21:15,077 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)] === [2024-06-27 23:21:15,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:21:15,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1302398080, now seen corresponding path program 12 times [2024-06-27 23:21:15,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:21:15,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234327484] [2024-06-27 23:21:15,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:21:15,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:21:15,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:21:16,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:21:16,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:21:16,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234327484] [2024-06-27 23:21:16,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234327484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:21:16,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:21:16,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:21:16,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935726567] [2024-06-27 23:21:16,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:21:16,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:21:16,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:21:16,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:21:16,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:21:16,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:21:16,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 574 transitions, 8318 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:21:16,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:21:16,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:21:16,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:21:18,679 INFO L124 PetriNetUnfolderBase]: 4042/6222 cut-off events. [2024-06-27 23:21:18,680 INFO L125 PetriNetUnfolderBase]: For 963110/963143 co-relation queries the response was YES. [2024-06-27 23:21:18,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65869 conditions, 6222 events. 4042/6222 cut-off events. For 963110/963143 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 34930 event pairs, 1303 based on Foata normal form. 6/6184 useless extension candidates. Maximal degree in co-relation 65731. Up to 5607 conditions per place. [2024-06-27 23:21:18,766 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 536 selfloop transitions, 66 changer transitions 0/613 dead transitions. [2024-06-27 23:21:18,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 613 transitions, 10202 flow [2024-06-27 23:21:18,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:21:18,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:21:18,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-27 23:21:18,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-27 23:21:18,768 INFO L175 Difference]: Start difference. First operand has 292 places, 574 transitions, 8318 flow. Second operand 9 states and 174 transitions. [2024-06-27 23:21:18,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 613 transitions, 10202 flow [2024-06-27 23:21:19,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 613 transitions, 9953 flow, removed 72 selfloop flow, removed 8 redundant places. [2024-06-27 23:21:19,855 INFO L231 Difference]: Finished difference. Result has 293 places, 574 transitions, 8214 flow [2024-06-27 23:21:19,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8069, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8214, PETRI_PLACES=293, PETRI_TRANSITIONS=574} [2024-06-27 23:21:19,856 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 249 predicate places. [2024-06-27 23:21:19,856 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 574 transitions, 8214 flow [2024-06-27 23:21:19,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:21:19,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:21:19,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:21:19,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 23:21:19,857 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:21:19,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:21:19,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1072472320, now seen corresponding path program 13 times [2024-06-27 23:21:19,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:21:19,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862234691] [2024-06-27 23:21:19,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:21:19,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:21:19,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:21:21,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:21:21,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:21:21,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862234691] [2024-06-27 23:21:21,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862234691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:21:21,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:21:21,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:21:21,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43300979] [2024-06-27 23:21:21,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:21:21,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:21:21,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:21:21,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:21:21,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:21:21,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:21:21,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 574 transitions, 8214 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:21:21,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:21:21,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:21:21,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:21:23,391 INFO L124 PetriNetUnfolderBase]: 4007/6164 cut-off events. [2024-06-27 23:21:23,391 INFO L125 PetriNetUnfolderBase]: For 970329/970362 co-relation queries the response was YES. [2024-06-27 23:21:23,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65004 conditions, 6164 events. 4007/6164 cut-off events. For 970329/970362 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 34466 event pairs, 1301 based on Foata normal form. 8/6125 useless extension candidates. Maximal degree in co-relation 64865. Up to 5681 conditions per place. [2024-06-27 23:21:23,487 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 559 selfloop transitions, 36 changer transitions 0/606 dead transitions. [2024-06-27 23:21:23,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 606 transitions, 9722 flow [2024-06-27 23:21:23,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:21:23,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:21:23,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 23:21:23,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-27 23:21:23,489 INFO L175 Difference]: Start difference. First operand has 293 places, 574 transitions, 8214 flow. Second operand 9 states and 168 transitions. [2024-06-27 23:21:23,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 606 transitions, 9722 flow [2024-06-27 23:21:24,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 606 transitions, 9553 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-27 23:21:24,736 INFO L231 Difference]: Finished difference. Result has 295 places, 574 transitions, 8133 flow [2024-06-27 23:21:24,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8045, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8133, PETRI_PLACES=295, PETRI_TRANSITIONS=574} [2024-06-27 23:21:24,736 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 251 predicate places. [2024-06-27 23:21:24,736 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 574 transitions, 8133 flow [2024-06-27 23:21:24,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:21:24,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:21:24,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:21:24,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 23:21:24,737 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:21:24,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:21:24,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1308832130, now seen corresponding path program 6 times [2024-06-27 23:21:24,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:21:24,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111485181] [2024-06-27 23:21:24,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:21:24,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:21:24,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:21:27,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:21:27,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:21:27,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111485181] [2024-06-27 23:21:27,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111485181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:21:27,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:21:27,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:21:27,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718684878] [2024-06-27 23:21:27,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:21:27,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:21:27,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:21:27,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:21:27,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:21:27,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:21:27,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 574 transitions, 8133 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:21:27,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:21:27,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:21:27,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:21:29,024 INFO L124 PetriNetUnfolderBase]: 3843/5991 cut-off events. [2024-06-27 23:21:29,024 INFO L125 PetriNetUnfolderBase]: For 994460/994501 co-relation queries the response was YES. [2024-06-27 23:21:29,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63920 conditions, 5991 events. 3843/5991 cut-off events. For 994460/994501 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 34198 event pairs, 1231 based on Foata normal form. 5/5928 useless extension candidates. Maximal degree in co-relation 63780. Up to 5386 conditions per place. [2024-06-27 23:21:29,112 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 517 selfloop transitions, 27 changer transitions 0/603 dead transitions. [2024-06-27 23:21:29,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 603 transitions, 9512 flow [2024-06-27 23:21:29,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:21:29,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:21:29,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-27 23:21:29,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-27 23:21:29,114 INFO L175 Difference]: Start difference. First operand has 295 places, 574 transitions, 8133 flow. Second operand 10 states and 185 transitions. [2024-06-27 23:21:29,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 603 transitions, 9512 flow [2024-06-27 23:21:30,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 603 transitions, 9382 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-27 23:21:30,173 INFO L231 Difference]: Finished difference. Result has 296 places, 576 transitions, 8144 flow [2024-06-27 23:21:30,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8003, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8144, PETRI_PLACES=296, PETRI_TRANSITIONS=576} [2024-06-27 23:21:30,174 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 252 predicate places. [2024-06-27 23:21:30,174 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 576 transitions, 8144 flow [2024-06-27 23:21:30,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:21:30,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:21:30,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:21:30,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 23:21:30,174 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:21:30,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:21:30,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1308832006, now seen corresponding path program 12 times [2024-06-27 23:21:30,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:21:30,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007922101] [2024-06-27 23:21:30,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:21:30,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:21:30,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:21:32,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:21:32,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:21:32,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007922101] [2024-06-27 23:21:32,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007922101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:21:32,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:21:32,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:21:32,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108174858] [2024-06-27 23:21:32,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:21:32,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:21:32,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:21:32,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:21:32,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:21:32,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:21:32,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 576 transitions, 8144 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:21:32,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:21:32,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:21:32,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:21:34,286 INFO L124 PetriNetUnfolderBase]: 4010/6168 cut-off events. [2024-06-27 23:21:34,287 INFO L125 PetriNetUnfolderBase]: For 997016/997033 co-relation queries the response was YES. [2024-06-27 23:21:34,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65466 conditions, 6168 events. 4010/6168 cut-off events. For 997016/997033 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 34525 event pairs, 1302 based on Foata normal form. 2/6123 useless extension candidates. Maximal degree in co-relation 65325. Up to 5648 conditions per place. [2024-06-27 23:21:34,379 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 536 selfloop transitions, 65 changer transitions 0/612 dead transitions. [2024-06-27 23:21:34,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 612 transitions, 10079 flow [2024-06-27 23:21:34,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:21:34,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:21:34,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 23:21:34,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 23:21:34,381 INFO L175 Difference]: Start difference. First operand has 296 places, 576 transitions, 8144 flow. Second operand 9 states and 172 transitions. [2024-06-27 23:21:34,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 612 transitions, 10079 flow [2024-06-27 23:21:35,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 612 transitions, 9956 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-27 23:21:35,899 INFO L231 Difference]: Finished difference. Result has 297 places, 582 transitions, 8365 flow [2024-06-27 23:21:35,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8021, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8365, PETRI_PLACES=297, PETRI_TRANSITIONS=582} [2024-06-27 23:21:35,900 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 253 predicate places. [2024-06-27 23:21:35,900 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 582 transitions, 8365 flow [2024-06-27 23:21:35,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:21:35,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:21:35,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:21:35,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 23:21:35,901 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:21:35,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:21:35,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1308647680, now seen corresponding path program 14 times [2024-06-27 23:21:35,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:21:35,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455660644] [2024-06-27 23:21:35,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:21:35,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:21:35,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:21:37,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:21:37,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:21:37,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455660644] [2024-06-27 23:21:37,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455660644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:21:37,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:21:37,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:21:37,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072560934] [2024-06-27 23:21:37,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:21:37,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:21:37,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:21:37,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:21:37,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:21:37,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:21:37,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 582 transitions, 8365 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:21:37,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:21:37,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:21:37,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:21:39,672 INFO L124 PetriNetUnfolderBase]: 4052/6237 cut-off events. [2024-06-27 23:21:39,672 INFO L125 PetriNetUnfolderBase]: For 1038661/1038678 co-relation queries the response was YES. [2024-06-27 23:21:39,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66830 conditions, 6237 events. 4052/6237 cut-off events. For 1038661/1038678 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 35016 event pairs, 1301 based on Foata normal form. 5/6198 useless extension candidates. Maximal degree in co-relation 66688. Up to 5442 conditions per place. [2024-06-27 23:21:39,754 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 519 selfloop transitions, 107 changer transitions 0/637 dead transitions. [2024-06-27 23:21:39,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 637 transitions, 10616 flow [2024-06-27 23:21:39,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:21:39,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:21:39,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 23:21:39,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-27 23:21:39,756 INFO L175 Difference]: Start difference. First operand has 297 places, 582 transitions, 8365 flow. Second operand 9 states and 178 transitions. [2024-06-27 23:21:39,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 637 transitions, 10616 flow [2024-06-27 23:21:41,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 637 transitions, 10419 flow, removed 68 selfloop flow, removed 5 redundant places. [2024-06-27 23:21:41,246 INFO L231 Difference]: Finished difference. Result has 301 places, 589 transitions, 8568 flow [2024-06-27 23:21:41,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8168, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8568, PETRI_PLACES=301, PETRI_TRANSITIONS=589} [2024-06-27 23:21:41,246 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 257 predicate places. [2024-06-27 23:21:41,247 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 589 transitions, 8568 flow [2024-06-27 23:21:41,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:21:41,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:21:41,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:21:41,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 23:21:41,247 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)] === [2024-06-27 23:21:41,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:21:41,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1393484650, now seen corresponding path program 15 times [2024-06-27 23:21:41,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:21:41,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121988784] [2024-06-27 23:21:41,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:21:41,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:21:41,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:21:43,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:21:43,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:21:43,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121988784] [2024-06-27 23:21:43,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121988784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:21:43,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:21:43,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:21:43,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517299955] [2024-06-27 23:21:43,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:21:43,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:21:43,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:21:43,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:21:43,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:21:43,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:21:43,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 589 transitions, 8568 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:21:43,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:21:43,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:21:43,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:21:45,009 INFO L124 PetriNetUnfolderBase]: 4032/6208 cut-off events. [2024-06-27 23:21:45,009 INFO L125 PetriNetUnfolderBase]: For 1050176/1050193 co-relation queries the response was YES. [2024-06-27 23:21:45,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66569 conditions, 6208 events. 4032/6208 cut-off events. For 1050176/1050193 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 34795 event pairs, 1299 based on Foata normal form. 6/6170 useless extension candidates. Maximal degree in co-relation 66425. Up to 5422 conditions per place. [2024-06-27 23:21:45,121 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 524 selfloop transitions, 105 changer transitions 0/640 dead transitions. [2024-06-27 23:21:45,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 640 transitions, 10473 flow [2024-06-27 23:21:45,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:21:45,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:21:45,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 23:21:45,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-27 23:21:45,123 INFO L175 Difference]: Start difference. First operand has 301 places, 589 transitions, 8568 flow. Second operand 9 states and 178 transitions. [2024-06-27 23:21:45,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 640 transitions, 10473 flow [2024-06-27 23:21:46,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 640 transitions, 9893 flow, removed 178 selfloop flow, removed 7 redundant places. [2024-06-27 23:21:46,722 INFO L231 Difference]: Finished difference. Result has 303 places, 589 transitions, 8243 flow [2024-06-27 23:21:46,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8020, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8243, PETRI_PLACES=303, PETRI_TRANSITIONS=589} [2024-06-27 23:21:46,722 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 259 predicate places. [2024-06-27 23:21:46,722 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 589 transitions, 8243 flow [2024-06-27 23:21:46,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:21:46,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:21:46,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:21:46,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 23:21:46,723 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:21:46,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:21:46,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1393484464, now seen corresponding path program 13 times [2024-06-27 23:21:46,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:21:46,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928355692] [2024-06-27 23:21:46,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:21:46,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:21:46,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:21:48,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:21:48,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:21:48,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928355692] [2024-06-27 23:21:48,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928355692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:21:48,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:21:48,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:21:48,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165764408] [2024-06-27 23:21:48,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:21:48,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:21:48,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:21:48,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:21:48,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:21:49,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:21:49,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 589 transitions, 8243 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:21:49,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:21:49,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:21:49,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:21:50,848 INFO L124 PetriNetUnfolderBase]: 4027/6201 cut-off events. [2024-06-27 23:21:50,848 INFO L125 PetriNetUnfolderBase]: For 1056495/1056512 co-relation queries the response was YES. [2024-06-27 23:21:50,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65950 conditions, 6201 events. 4027/6201 cut-off events. For 1056495/1056512 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 34826 event pairs, 1301 based on Foata normal form. 2/6156 useless extension candidates. Maximal degree in co-relation 65806. Up to 5720 conditions per place. [2024-06-27 23:21:50,934 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 555 selfloop transitions, 53 changer transitions 0/619 dead transitions. [2024-06-27 23:21:50,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 619 transitions, 9740 flow [2024-06-27 23:21:50,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:21:50,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:21:50,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-27 23:21:50,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 23:21:50,937 INFO L175 Difference]: Start difference. First operand has 303 places, 589 transitions, 8243 flow. Second operand 10 states and 180 transitions. [2024-06-27 23:21:50,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 619 transitions, 9740 flow [2024-06-27 23:21:52,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 619 transitions, 9356 flow, removed 45 selfloop flow, removed 9 redundant places. [2024-06-27 23:21:52,378 INFO L231 Difference]: Finished difference. Result has 304 places, 589 transitions, 7974 flow [2024-06-27 23:21:52,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7859, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7974, PETRI_PLACES=304, PETRI_TRANSITIONS=589} [2024-06-27 23:21:52,379 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 260 predicate places. [2024-06-27 23:21:52,379 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 589 transitions, 7974 flow [2024-06-27 23:21:52,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:21:52,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:21:52,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:21:52,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 23:21:52,380 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:21:52,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:21:52,380 INFO L85 PathProgramCache]: Analyzing trace with hash 104257858, now seen corresponding path program 3 times [2024-06-27 23:21:52,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:21:52,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883515830] [2024-06-27 23:21:52,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:21:52,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:21:52,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:21:53,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:21:53,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:21:53,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883515830] [2024-06-27 23:21:53,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883515830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:21:53,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:21:53,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:21:53,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100463359] [2024-06-27 23:21:53,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:21:53,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:21:53,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:21:53,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:21:53,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:21:53,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:21:53,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 589 transitions, 7974 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:21:53,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:21:53,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:21:53,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:21:55,395 INFO L124 PetriNetUnfolderBase]: 4304/6495 cut-off events. [2024-06-27 23:21:55,395 INFO L125 PetriNetUnfolderBase]: For 1058691/1058756 co-relation queries the response was YES. [2024-06-27 23:21:55,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66700 conditions, 6495 events. 4304/6495 cut-off events. For 1058691/1058756 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 35233 event pairs, 1553 based on Foata normal form. 14/6453 useless extension candidates. Maximal degree in co-relation 66555. Up to 6202 conditions per place. [2024-06-27 23:21:55,493 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 545 selfloop transitions, 13 changer transitions 0/597 dead transitions. [2024-06-27 23:21:55,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 597 transitions, 9138 flow [2024-06-27 23:21:55,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:21:55,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:21:55,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-27 23:21:55,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3992248062015504 [2024-06-27 23:21:55,494 INFO L175 Difference]: Start difference. First operand has 304 places, 589 transitions, 7974 flow. Second operand 6 states and 103 transitions. [2024-06-27 23:21:55,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 597 transitions, 9138 flow [2024-06-27 23:21:57,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 597 transitions, 8987 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-27 23:21:57,402 INFO L231 Difference]: Finished difference. Result has 301 places, 589 transitions, 7855 flow [2024-06-27 23:21:57,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7823, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7855, PETRI_PLACES=301, PETRI_TRANSITIONS=589} [2024-06-27 23:21:57,403 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 257 predicate places. [2024-06-27 23:21:57,403 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 589 transitions, 7855 flow [2024-06-27 23:21:57,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:21:57,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:21:57,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:21:57,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 23:21:57,404 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:21:57,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:21:57,404 INFO L85 PathProgramCache]: Analyzing trace with hash 96645250, now seen corresponding path program 1 times [2024-06-27 23:21:57,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:21:57,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846251502] [2024-06-27 23:21:57,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:21:57,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:21:57,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:21:59,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:21:59,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:21:59,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846251502] [2024-06-27 23:21:59,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846251502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:21:59,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:21:59,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:21:59,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433255349] [2024-06-27 23:21:59,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:21:59,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:21:59,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:21:59,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:21:59,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:21:59,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:21:59,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 589 transitions, 7855 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:21:59,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:21:59,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:21:59,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:22:01,300 INFO L124 PetriNetUnfolderBase]: 4390/6624 cut-off events. [2024-06-27 23:22:01,300 INFO L125 PetriNetUnfolderBase]: For 1079953/1079958 co-relation queries the response was YES. [2024-06-27 23:22:01,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67209 conditions, 6624 events. 4390/6624 cut-off events. For 1079953/1079958 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 35661 event pairs, 1541 based on Foata normal form. 2/6612 useless extension candidates. Maximal degree in co-relation 67063. Up to 6282 conditions per place. [2024-06-27 23:22:01,395 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 536 selfloop transitions, 18 changer transitions 0/607 dead transitions. [2024-06-27 23:22:01,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 607 transitions, 9287 flow [2024-06-27 23:22:01,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:22:01,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:22:01,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-27 23:22:01,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42248062015503873 [2024-06-27 23:22:01,396 INFO L175 Difference]: Start difference. First operand has 301 places, 589 transitions, 7855 flow. Second operand 6 states and 109 transitions. [2024-06-27 23:22:01,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 607 transitions, 9287 flow [2024-06-27 23:22:03,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 607 transitions, 9235 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 23:22:03,277 INFO L231 Difference]: Finished difference. Result has 302 places, 595 transitions, 7937 flow [2024-06-27 23:22:03,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7803, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7937, PETRI_PLACES=302, PETRI_TRANSITIONS=595} [2024-06-27 23:22:03,277 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 258 predicate places. [2024-06-27 23:22:03,277 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 595 transitions, 7937 flow [2024-06-27 23:22:03,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:22:03,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:22:03,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:22:03,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 23:22:03,278 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:22:03,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:22:03,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1629974350, now seen corresponding path program 1 times [2024-06-27 23:22:03,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:22:03,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752293838] [2024-06-27 23:22:03,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:22:03,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:22:03,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:22:05,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:22:05,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:22:05,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752293838] [2024-06-27 23:22:05,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752293838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:22:05,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:22:05,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:22:05,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175991381] [2024-06-27 23:22:05,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:22:05,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:22:05,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:22:05,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:22:05,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:22:05,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:22:05,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 595 transitions, 7937 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:22:05,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:22:05,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:22:05,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:22:07,821 INFO L124 PetriNetUnfolderBase]: 4378/6605 cut-off events. [2024-06-27 23:22:07,821 INFO L125 PetriNetUnfolderBase]: For 1138181/1138208 co-relation queries the response was YES. [2024-06-27 23:22:07,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68670 conditions, 6605 events. 4378/6605 cut-off events. For 1138181/1138208 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 35737 event pairs, 1470 based on Foata normal form. 4/6570 useless extension candidates. Maximal degree in co-relation 68522. Up to 6291 conditions per place. [2024-06-27 23:22:07,914 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 589 selfloop transitions, 24 changer transitions 0/624 dead transitions. [2024-06-27 23:22:07,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 624 transitions, 9453 flow [2024-06-27 23:22:07,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:22:07,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:22:07,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-27 23:22:07,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3930232558139535 [2024-06-27 23:22:07,916 INFO L175 Difference]: Start difference. First operand has 302 places, 595 transitions, 7937 flow. Second operand 10 states and 169 transitions. [2024-06-27 23:22:07,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 624 transitions, 9453 flow [2024-06-27 23:22:09,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 624 transitions, 9422 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 23:22:09,803 INFO L231 Difference]: Finished difference. Result has 310 places, 597 transitions, 8045 flow [2024-06-27 23:22:09,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7906, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8045, PETRI_PLACES=310, PETRI_TRANSITIONS=597} [2024-06-27 23:22:09,804 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 266 predicate places. [2024-06-27 23:22:09,804 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 597 transitions, 8045 flow [2024-06-27 23:22:09,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:22:09,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:22:09,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:22:09,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 23:22:09,805 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:22:09,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:22:09,805 INFO L85 PathProgramCache]: Analyzing trace with hash 96854500, now seen corresponding path program 2 times [2024-06-27 23:22:09,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:22:09,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410097796] [2024-06-27 23:22:09,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:22:09,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:22:09,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:22:11,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:22:11,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:22:11,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410097796] [2024-06-27 23:22:11,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410097796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:22:11,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:22:11,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:22:11,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930900923] [2024-06-27 23:22:11,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:22:11,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:22:11,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:22:11,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:22:11,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:22:12,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:22:12,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 597 transitions, 8045 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:22:12,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:22:12,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:22:12,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:22:13,863 INFO L124 PetriNetUnfolderBase]: 4379/6608 cut-off events. [2024-06-27 23:22:13,863 INFO L125 PetriNetUnfolderBase]: For 1118972/1118979 co-relation queries the response was YES. [2024-06-27 23:22:13,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68024 conditions, 6608 events. 4379/6608 cut-off events. For 1118972/1118979 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 35568 event pairs, 1534 based on Foata normal form. 4/6598 useless extension candidates. Maximal degree in co-relation 67873. Up to 6267 conditions per place. [2024-06-27 23:22:13,976 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 534 selfloop transitions, 18 changer transitions 0/605 dead transitions. [2024-06-27 23:22:13,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 605 transitions, 9197 flow [2024-06-27 23:22:13,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:22:13,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:22:13,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-27 23:22:13,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-27 23:22:13,978 INFO L175 Difference]: Start difference. First operand has 310 places, 597 transitions, 8045 flow. Second operand 6 states and 105 transitions. [2024-06-27 23:22:13,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 605 transitions, 9197 flow [2024-06-27 23:22:15,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 605 transitions, 9034 flow, removed 58 selfloop flow, removed 8 redundant places. [2024-06-27 23:22:15,674 INFO L231 Difference]: Finished difference. Result has 308 places, 597 transitions, 7926 flow [2024-06-27 23:22:15,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7882, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7926, PETRI_PLACES=308, PETRI_TRANSITIONS=597} [2024-06-27 23:22:15,675 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 264 predicate places. [2024-06-27 23:22:15,675 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 597 transitions, 7926 flow [2024-06-27 23:22:15,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:22:15,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:22:15,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:22:15,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 23:22:15,676 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:22:15,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:22:15,676 INFO L85 PathProgramCache]: Analyzing trace with hash 547563810, now seen corresponding path program 1 times [2024-06-27 23:22:15,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:22:15,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46492631] [2024-06-27 23:22:15,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:22:15,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:22:15,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:22:18,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:22:18,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:22:18,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46492631] [2024-06-27 23:22:18,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46492631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:22:18,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:22:18,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:22:18,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731727752] [2024-06-27 23:22:18,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:22:18,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:22:18,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:22:18,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:22:18,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:22:18,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:22:18,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 597 transitions, 7926 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:22:18,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:22:18,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:22:18,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:22:19,964 INFO L124 PetriNetUnfolderBase]: 4104/6288 cut-off events. [2024-06-27 23:22:19,964 INFO L125 PetriNetUnfolderBase]: For 1148935/1149014 co-relation queries the response was YES. [2024-06-27 23:22:20,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65889 conditions, 6288 events. 4104/6288 cut-off events. For 1148935/1149014 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 34689 event pairs, 1467 based on Foata normal form. 19/6236 useless extension candidates. Maximal degree in co-relation 65737. Up to 5787 conditions per place. [2024-06-27 23:22:20,065 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 506 selfloop transitions, 20 changer transitions 0/615 dead transitions. [2024-06-27 23:22:20,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 615 transitions, 9118 flow [2024-06-27 23:22:20,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:22:20,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:22:20,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 23:22:20,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-27 23:22:20,066 INFO L175 Difference]: Start difference. First operand has 308 places, 597 transitions, 7926 flow. Second operand 8 states and 139 transitions. [2024-06-27 23:22:20,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 615 transitions, 9118 flow [2024-06-27 23:22:22,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 615 transitions, 9074 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 23:22:22,062 INFO L231 Difference]: Finished difference. Result has 314 places, 604 transitions, 8033 flow [2024-06-27 23:22:22,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7882, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8033, PETRI_PLACES=314, PETRI_TRANSITIONS=604} [2024-06-27 23:22:22,063 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 270 predicate places. [2024-06-27 23:22:22,063 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 604 transitions, 8033 flow [2024-06-27 23:22:22,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:22:22,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:22:22,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:22:22,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 23:22:22,064 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)] === [2024-06-27 23:22:22,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:22:22,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1442985804, now seen corresponding path program 1 times [2024-06-27 23:22:22,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:22:22,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412997771] [2024-06-27 23:22:22,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:22:22,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:22:22,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:22:24,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:22:24,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:22:24,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412997771] [2024-06-27 23:22:24,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412997771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:22:24,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:22:24,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:22:24,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795481935] [2024-06-27 23:22:24,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:22:24,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:22:24,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:22:24,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:22:24,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:22:24,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-27 23:22:24,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 604 transitions, 8033 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:22:24,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:22:24,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-27 23:22:24,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:22:26,079 INFO L124 PetriNetUnfolderBase]: 3680/5877 cut-off events. [2024-06-27 23:22:26,079 INFO L125 PetriNetUnfolderBase]: For 1152684/1152904 co-relation queries the response was YES. [2024-06-27 23:22:26,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64167 conditions, 5877 events. 3680/5877 cut-off events. For 1152684/1152904 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 35246 event pairs, 573 based on Foata normal form. 14/5762 useless extension candidates. Maximal degree in co-relation 64011. Up to 4367 conditions per place. [2024-06-27 23:22:26,173 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 419 selfloop transitions, 156 changer transitions 0/653 dead transitions. [2024-06-27 23:22:26,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 653 transitions, 10183 flow [2024-06-27 23:22:26,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:22:26,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:22:26,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 242 transitions. [2024-06-27 23:22:26,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5116279069767442 [2024-06-27 23:22:26,174 INFO L175 Difference]: Start difference. First operand has 314 places, 604 transitions, 8033 flow. Second operand 11 states and 242 transitions. [2024-06-27 23:22:26,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 653 transitions, 10183 flow [2024-06-27 23:22:28,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 653 transitions, 10106 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-27 23:22:28,295 INFO L231 Difference]: Finished difference. Result has 322 places, 611 transitions, 8637 flow [2024-06-27 23:22:28,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7956, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8637, PETRI_PLACES=322, PETRI_TRANSITIONS=611} [2024-06-27 23:22:28,295 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 278 predicate places. [2024-06-27 23:22:28,295 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 611 transitions, 8637 flow [2024-06-27 23:22:28,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:22:28,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:22:28,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:22:28,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 23:22:28,296 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)] === [2024-06-27 23:22:28,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:22:28,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1269369125, now seen corresponding path program 2 times [2024-06-27 23:22:28,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:22:28,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387098787] [2024-06-27 23:22:28,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:22:28,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:22:28,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:22:30,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:22:30,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:22:30,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387098787] [2024-06-27 23:22:30,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387098787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:22:30,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:22:30,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:22:30,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013440255] [2024-06-27 23:22:30,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:22:30,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:22:30,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:22:30,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:22:30,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:22:30,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:22:30,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 611 transitions, 8637 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:22:30,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:22:30,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:22:30,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:22:33,128 INFO L124 PetriNetUnfolderBase]: 4250/6530 cut-off events. [2024-06-27 23:22:33,128 INFO L125 PetriNetUnfolderBase]: For 1343938/1343989 co-relation queries the response was YES. [2024-06-27 23:22:33,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74344 conditions, 6530 events. 4250/6530 cut-off events. For 1343938/1343989 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 36876 event pairs, 929 based on Foata normal form. 12/6484 useless extension candidates. Maximal degree in co-relation 74185. Up to 5458 conditions per place. [2024-06-27 23:22:33,226 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 473 selfloop transitions, 191 changer transitions 0/677 dead transitions. [2024-06-27 23:22:33,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 677 transitions, 11244 flow [2024-06-27 23:22:33,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 23:22:33,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 23:22:33,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 237 transitions. [2024-06-27 23:22:33,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-27 23:22:33,228 INFO L175 Difference]: Start difference. First operand has 322 places, 611 transitions, 8637 flow. Second operand 12 states and 237 transitions. [2024-06-27 23:22:33,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 677 transitions, 11244 flow [2024-06-27 23:22:35,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 677 transitions, 11016 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-27 23:22:35,014 INFO L231 Difference]: Finished difference. Result has 329 places, 634 transitions, 9479 flow [2024-06-27 23:22:35,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8415, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9479, PETRI_PLACES=329, PETRI_TRANSITIONS=634} [2024-06-27 23:22:35,014 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 285 predicate places. [2024-06-27 23:22:35,014 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 634 transitions, 9479 flow [2024-06-27 23:22:35,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:22:35,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:22:35,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:22:35,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 23:22:35,015 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)] === [2024-06-27 23:22:35,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:22:35,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1307349158, now seen corresponding path program 2 times [2024-06-27 23:22:35,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:22:35,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942044103] [2024-06-27 23:22:35,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:22:35,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:22:35,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:22:38,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:22:38,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:22:38,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942044103] [2024-06-27 23:22:38,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942044103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:22:38,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:22:38,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:22:38,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806704679] [2024-06-27 23:22:38,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:22:38,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:22:38,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:22:38,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:22:38,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:22:38,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:22:38,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 634 transitions, 9479 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:22:38,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:22:38,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:22:38,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:22:40,776 INFO L124 PetriNetUnfolderBase]: 4342/6633 cut-off events. [2024-06-27 23:22:40,776 INFO L125 PetriNetUnfolderBase]: For 1415303/1415353 co-relation queries the response was YES. [2024-06-27 23:22:40,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77746 conditions, 6633 events. 4342/6633 cut-off events. For 1415303/1415353 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 37437 event pairs, 773 based on Foata normal form. 16/6569 useless extension candidates. Maximal degree in co-relation 77584. Up to 5400 conditions per place. [2024-06-27 23:22:40,880 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 499 selfloop transitions, 175 changer transitions 0/687 dead transitions. [2024-06-27 23:22:40,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 687 transitions, 11726 flow [2024-06-27 23:22:40,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:22:40,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:22:40,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-27 23:22:40,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 23:22:40,882 INFO L175 Difference]: Start difference. First operand has 329 places, 634 transitions, 9479 flow. Second operand 10 states and 215 transitions. [2024-06-27 23:22:40,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 687 transitions, 11726 flow [2024-06-27 23:22:43,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 687 transitions, 11505 flow, removed 67 selfloop flow, removed 7 redundant places. [2024-06-27 23:22:43,280 INFO L231 Difference]: Finished difference. Result has 332 places, 640 transitions, 9802 flow [2024-06-27 23:22:43,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9262, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9802, PETRI_PLACES=332, PETRI_TRANSITIONS=640} [2024-06-27 23:22:43,281 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 288 predicate places. [2024-06-27 23:22:43,281 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 640 transitions, 9802 flow [2024-06-27 23:22:43,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:22:43,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:22:43,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:22:43,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 23:22:43,281 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)] === [2024-06-27 23:22:43,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:22:43,282 INFO L85 PathProgramCache]: Analyzing trace with hash -388126225, now seen corresponding path program 3 times [2024-06-27 23:22:43,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:22:43,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811460380] [2024-06-27 23:22:43,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:22:43,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:22:43,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:22:47,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:22:47,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:22:47,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811460380] [2024-06-27 23:22:47,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811460380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:22:47,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:22:47,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:22:47,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597631051] [2024-06-27 23:22:47,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:22:47,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:22:47,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:22:47,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:22:47,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:22:47,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:22:47,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 640 transitions, 9802 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:22:47,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:22:47,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:22:47,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:22:50,138 INFO L124 PetriNetUnfolderBase]: 4452/6844 cut-off events. [2024-06-27 23:22:50,139 INFO L125 PetriNetUnfolderBase]: For 1403407/1403454 co-relation queries the response was YES. [2024-06-27 23:22:50,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79931 conditions, 6844 events. 4452/6844 cut-off events. For 1403407/1403454 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 39143 event pairs, 1006 based on Foata normal form. 17/6805 useless extension candidates. Maximal degree in co-relation 79769. Up to 5882 conditions per place. [2024-06-27 23:22:50,258 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 536 selfloop transitions, 181 changer transitions 0/730 dead transitions. [2024-06-27 23:22:50,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 730 transitions, 13270 flow [2024-06-27 23:22:50,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 23:22:50,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 23:22:50,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 248 transitions. [2024-06-27 23:22:50,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4806201550387597 [2024-06-27 23:22:50,260 INFO L175 Difference]: Start difference. First operand has 332 places, 640 transitions, 9802 flow. Second operand 12 states and 248 transitions. [2024-06-27 23:22:50,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 730 transitions, 13270 flow [2024-06-27 23:22:52,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 730 transitions, 12745 flow, removed 104 selfloop flow, removed 7 redundant places. [2024-06-27 23:22:52,756 INFO L231 Difference]: Finished difference. Result has 339 places, 667 transitions, 10328 flow [2024-06-27 23:22:52,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9302, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10328, PETRI_PLACES=339, PETRI_TRANSITIONS=667} [2024-06-27 23:22:52,756 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 295 predicate places. [2024-06-27 23:22:52,757 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 667 transitions, 10328 flow [2024-06-27 23:22:52,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:22:52,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:22:52,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:22:52,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 23:22:52,757 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)] === [2024-06-27 23:22:52,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:22:52,758 INFO L85 PathProgramCache]: Analyzing trace with hash -388289130, now seen corresponding path program 3 times [2024-06-27 23:22:52,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:22:52,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972213729] [2024-06-27 23:22:52,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:22:52,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:22:52,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:22:56,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:22:56,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:22:56,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972213729] [2024-06-27 23:22:56,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972213729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:22:56,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:22:56,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:22:56,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098731841] [2024-06-27 23:22:56,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:22:56,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:22:56,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:22:56,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:22:56,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:22:56,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:22:56,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 667 transitions, 10328 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:22:56,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:22:56,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:22:56,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:22:59,065 INFO L124 PetriNetUnfolderBase]: 4584/7047 cut-off events. [2024-06-27 23:22:59,066 INFO L125 PetriNetUnfolderBase]: For 1450991/1451049 co-relation queries the response was YES. [2024-06-27 23:22:59,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81793 conditions, 7047 events. 4584/7047 cut-off events. For 1450991/1451049 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 40691 event pairs, 1021 based on Foata normal form. 16/6991 useless extension candidates. Maximal degree in co-relation 81628. Up to 6022 conditions per place. [2024-06-27 23:22:59,171 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 543 selfloop transitions, 178 changer transitions 0/734 dead transitions. [2024-06-27 23:22:59,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 734 transitions, 12880 flow [2024-06-27 23:22:59,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:22:59,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:22:59,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-27 23:22:59,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 23:22:59,173 INFO L175 Difference]: Start difference. First operand has 339 places, 667 transitions, 10328 flow. Second operand 10 states and 215 transitions. [2024-06-27 23:22:59,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 734 transitions, 12880 flow [2024-06-27 23:23:01,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 734 transitions, 12560 flow, removed 84 selfloop flow, removed 7 redundant places. [2024-06-27 23:23:01,037 INFO L231 Difference]: Finished difference. Result has 343 places, 685 transitions, 10744 flow [2024-06-27 23:23:01,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10008, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10744, PETRI_PLACES=343, PETRI_TRANSITIONS=685} [2024-06-27 23:23:01,038 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 299 predicate places. [2024-06-27 23:23:01,038 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 685 transitions, 10744 flow [2024-06-27 23:23:01,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:01,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:23:01,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:23:01,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 23:23:01,039 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:23:01,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:23:01,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1792088094, now seen corresponding path program 4 times [2024-06-27 23:23:01,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:23:01,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578561811] [2024-06-27 23:23:01,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:23:01,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:23:01,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:23:05,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:23:05,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:23:05,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578561811] [2024-06-27 23:23:05,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578561811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:23:05,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:23:05,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:23:05,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111078213] [2024-06-27 23:23:05,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:23:05,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:23:05,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:23:05,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:23:05,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:23:05,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:23:05,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 685 transitions, 10744 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:05,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:23:05,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:23:05,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:23:08,108 INFO L124 PetriNetUnfolderBase]: 4629/7124 cut-off events. [2024-06-27 23:23:08,109 INFO L125 PetriNetUnfolderBase]: For 1482349/1482404 co-relation queries the response was YES. [2024-06-27 23:23:08,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83182 conditions, 7124 events. 4629/7124 cut-off events. For 1482349/1482404 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 41320 event pairs, 1093 based on Foata normal form. 16/7072 useless extension candidates. Maximal degree in co-relation 83014. Up to 6407 conditions per place. [2024-06-27 23:23:08,233 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 593 selfloop transitions, 136 changer transitions 0/742 dead transitions. [2024-06-27 23:23:08,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 742 transitions, 12744 flow [2024-06-27 23:23:08,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 23:23:08,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 23:23:08,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 245 transitions. [2024-06-27 23:23:08,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43828264758497315 [2024-06-27 23:23:08,235 INFO L175 Difference]: Start difference. First operand has 343 places, 685 transitions, 10744 flow. Second operand 13 states and 245 transitions. [2024-06-27 23:23:08,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 742 transitions, 12744 flow [2024-06-27 23:23:10,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 742 transitions, 12465 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-27 23:23:10,502 INFO L231 Difference]: Finished difference. Result has 351 places, 693 transitions, 10973 flow [2024-06-27 23:23:10,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10467, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10973, PETRI_PLACES=351, PETRI_TRANSITIONS=693} [2024-06-27 23:23:10,503 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 307 predicate places. [2024-06-27 23:23:10,503 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 693 transitions, 10973 flow [2024-06-27 23:23:10,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:10,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:23:10,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:23:10,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 23:23:10,504 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)] === [2024-06-27 23:23:10,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:23:10,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1995810316, now seen corresponding path program 5 times [2024-06-27 23:23:10,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:23:10,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24415] [2024-06-27 23:23:10,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:23:10,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:23:10,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:23:14,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:23:14,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:23:14,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24415] [2024-06-27 23:23:14,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:23:14,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:23:14,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:23:14,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678772156] [2024-06-27 23:23:14,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:23:14,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:23:14,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:23:14,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:23:14,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:23:14,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:23:14,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 693 transitions, 10973 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:14,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:23:14,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:23:14,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:23:16,908 INFO L124 PetriNetUnfolderBase]: 4662/7174 cut-off events. [2024-06-27 23:23:16,908 INFO L125 PetriNetUnfolderBase]: For 1515917/1515962 co-relation queries the response was YES. [2024-06-27 23:23:16,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84253 conditions, 7174 events. 4662/7174 cut-off events. For 1515917/1515962 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 41579 event pairs, 1109 based on Foata normal form. 8/7118 useless extension candidates. Maximal degree in co-relation 84081. Up to 6320 conditions per place. [2024-06-27 23:23:17,029 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 594 selfloop transitions, 130 changer transitions 0/737 dead transitions. [2024-06-27 23:23:17,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 737 transitions, 13193 flow [2024-06-27 23:23:17,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:23:17,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:23:17,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-27 23:23:17,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49612403100775193 [2024-06-27 23:23:17,031 INFO L175 Difference]: Start difference. First operand has 351 places, 693 transitions, 10973 flow. Second operand 9 states and 192 transitions. [2024-06-27 23:23:17,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 737 transitions, 13193 flow [2024-06-27 23:23:19,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 737 transitions, 12889 flow, removed 42 selfloop flow, removed 10 redundant places. [2024-06-27 23:23:19,530 INFO L231 Difference]: Finished difference. Result has 350 places, 697 transitions, 11055 flow [2024-06-27 23:23:19,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10669, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=693, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11055, PETRI_PLACES=350, PETRI_TRANSITIONS=697} [2024-06-27 23:23:19,531 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 306 predicate places. [2024-06-27 23:23:19,531 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 697 transitions, 11055 flow [2024-06-27 23:23:19,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:19,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:23:19,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:23:19,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 23:23:19,532 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)] === [2024-06-27 23:23:19,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:23:19,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1995647411, now seen corresponding path program 4 times [2024-06-27 23:23:19,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:23:19,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871224050] [2024-06-27 23:23:19,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:23:19,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:23:19,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:23:22,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:23:22,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:23:22,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871224050] [2024-06-27 23:23:22,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871224050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:23:22,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:23:22,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:23:22,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085088683] [2024-06-27 23:23:22,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:23:22,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:23:22,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:23:22,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:23:22,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:23:23,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:23:23,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 697 transitions, 11055 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:23,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:23:23,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:23:23,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:23:25,482 INFO L124 PetriNetUnfolderBase]: 4798/7399 cut-off events. [2024-06-27 23:23:25,482 INFO L125 PetriNetUnfolderBase]: For 1611627/1611665 co-relation queries the response was YES. [2024-06-27 23:23:25,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87628 conditions, 7399 events. 4798/7399 cut-off events. For 1611627/1611665 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 43265 event pairs, 1097 based on Foata normal form. 16/7359 useless extension candidates. Maximal degree in co-relation 87456. Up to 6328 conditions per place. [2024-06-27 23:23:25,613 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 568 selfloop transitions, 179 changer transitions 0/760 dead transitions. [2024-06-27 23:23:25,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 760 transitions, 14209 flow [2024-06-27 23:23:25,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:23:25,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:23:25,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-27 23:23:25,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5116279069767442 [2024-06-27 23:23:25,615 INFO L175 Difference]: Start difference. First operand has 350 places, 697 transitions, 11055 flow. Second operand 9 states and 198 transitions. [2024-06-27 23:23:25,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 760 transitions, 14209 flow [2024-06-27 23:23:28,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 760 transitions, 13628 flow, removed 58 selfloop flow, removed 9 redundant places. [2024-06-27 23:23:28,089 INFO L231 Difference]: Finished difference. Result has 350 places, 715 transitions, 11435 flow [2024-06-27 23:23:28,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10474, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11435, PETRI_PLACES=350, PETRI_TRANSITIONS=715} [2024-06-27 23:23:28,090 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 306 predicate places. [2024-06-27 23:23:28,090 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 715 transitions, 11435 flow [2024-06-27 23:23:28,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:28,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:23:28,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:23:28,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 23:23:28,091 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)] === [2024-06-27 23:23:28,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:23:28,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1995652216, now seen corresponding path program 6 times [2024-06-27 23:23:28,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:23:28,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907359192] [2024-06-27 23:23:28,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:23:28,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:23:28,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:23:31,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:23:31,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:23:31,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907359192] [2024-06-27 23:23:31,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907359192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:23:31,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:23:31,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:23:31,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153631072] [2024-06-27 23:23:31,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:23:31,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:23:31,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:23:31,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:23:31,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:23:31,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:23:31,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 715 transitions, 11435 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:31,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:23:31,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:23:31,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:23:33,987 INFO L124 PetriNetUnfolderBase]: 4822/7431 cut-off events. [2024-06-27 23:23:33,987 INFO L125 PetriNetUnfolderBase]: For 1617874/1617920 co-relation queries the response was YES. [2024-06-27 23:23:34,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87649 conditions, 7431 events. 4822/7431 cut-off events. For 1617874/1617920 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 43553 event pairs, 1140 based on Foata normal form. 8/7370 useless extension candidates. Maximal degree in co-relation 87478. Up to 6691 conditions per place. [2024-06-27 23:23:34,118 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 618 selfloop transitions, 124 changer transitions 0/755 dead transitions. [2024-06-27 23:23:34,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 755 transitions, 13336 flow [2024-06-27 23:23:34,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:23:34,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:23:34,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-27 23:23:34,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 23:23:34,120 INFO L175 Difference]: Start difference. First operand has 350 places, 715 transitions, 11435 flow. Second operand 10 states and 200 transitions. [2024-06-27 23:23:34,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 755 transitions, 13336 flow [2024-06-27 23:23:36,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 755 transitions, 12915 flow, removed 140 selfloop flow, removed 5 redundant places. [2024-06-27 23:23:36,959 INFO L231 Difference]: Finished difference. Result has 355 places, 719 transitions, 11389 flow [2024-06-27 23:23:36,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11014, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11389, PETRI_PLACES=355, PETRI_TRANSITIONS=719} [2024-06-27 23:23:36,960 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 311 predicate places. [2024-06-27 23:23:36,960 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 719 transitions, 11389 flow [2024-06-27 23:23:36,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:36,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:23:36,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:23:36,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 23:23:36,960 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)] === [2024-06-27 23:23:36,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:23:36,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1991183566, now seen corresponding path program 7 times [2024-06-27 23:23:36,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:23:36,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245340916] [2024-06-27 23:23:36,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:23:36,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:23:36,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:23:40,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:23:40,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:23:40,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245340916] [2024-06-27 23:23:40,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245340916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:23:40,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:23:40,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:23:40,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988216052] [2024-06-27 23:23:40,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:23:40,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:23:40,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:23:40,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:23:40,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:23:40,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:23:40,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 719 transitions, 11389 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:40,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:23:40,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:23:40,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:23:43,492 INFO L124 PetriNetUnfolderBase]: 4862/7501 cut-off events. [2024-06-27 23:23:43,493 INFO L125 PetriNetUnfolderBase]: For 1650104/1650149 co-relation queries the response was YES. [2024-06-27 23:23:43,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88305 conditions, 7501 events. 4862/7501 cut-off events. For 1650104/1650149 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 44146 event pairs, 1157 based on Foata normal form. 8/7445 useless extension candidates. Maximal degree in co-relation 88131. Up to 6867 conditions per place. [2024-06-27 23:23:43,619 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 660 selfloop transitions, 94 changer transitions 0/767 dead transitions. [2024-06-27 23:23:43,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 767 transitions, 13334 flow [2024-06-27 23:23:43,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 23:23:43,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 23:23:43,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 230 transitions. [2024-06-27 23:23:43,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44573643410852715 [2024-06-27 23:23:43,621 INFO L175 Difference]: Start difference. First operand has 355 places, 719 transitions, 11389 flow. Second operand 12 states and 230 transitions. [2024-06-27 23:23:43,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 767 transitions, 13334 flow [2024-06-27 23:23:46,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 767 transitions, 13011 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-27 23:23:46,241 INFO L231 Difference]: Finished difference. Result has 359 places, 723 transitions, 11386 flow [2024-06-27 23:23:46,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11066, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11386, PETRI_PLACES=359, PETRI_TRANSITIONS=723} [2024-06-27 23:23:46,242 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 315 predicate places. [2024-06-27 23:23:46,242 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 723 transitions, 11386 flow [2024-06-27 23:23:46,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:46,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:23:46,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:23:46,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 23:23:46,242 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)] === [2024-06-27 23:23:46,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:23:46,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1991178761, now seen corresponding path program 5 times [2024-06-27 23:23:46,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:23:46,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867879140] [2024-06-27 23:23:46,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:23:46,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:23:46,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:23:49,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:23:49,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:23:49,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867879140] [2024-06-27 23:23:49,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867879140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:23:49,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:23:49,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:23:49,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593735924] [2024-06-27 23:23:49,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:23:49,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:23:49,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:23:49,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:23:49,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:23:50,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:23:50,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 723 transitions, 11386 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:50,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:23:50,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:23:50,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:23:52,917 INFO L124 PetriNetUnfolderBase]: 4862/7507 cut-off events. [2024-06-27 23:23:52,917 INFO L125 PetriNetUnfolderBase]: For 1669597/1669635 co-relation queries the response was YES. [2024-06-27 23:23:53,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88116 conditions, 7507 events. 4862/7507 cut-off events. For 1669597/1669635 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 44155 event pairs, 1124 based on Foata normal form. 9/7459 useless extension candidates. Maximal degree in co-relation 87942. Up to 6700 conditions per place. [2024-06-27 23:23:53,047 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 627 selfloop transitions, 140 changer transitions 0/780 dead transitions. [2024-06-27 23:23:53,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 780 transitions, 14324 flow [2024-06-27 23:23:53,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 23:23:53,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 23:23:53,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 244 transitions. [2024-06-27 23:23:53,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4728682170542636 [2024-06-27 23:23:53,049 INFO L175 Difference]: Start difference. First operand has 359 places, 723 transitions, 11386 flow. Second operand 12 states and 244 transitions. [2024-06-27 23:23:53,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 780 transitions, 14324 flow [2024-06-27 23:23:55,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 780 transitions, 14064 flow, removed 46 selfloop flow, removed 9 redundant places. [2024-06-27 23:23:55,933 INFO L231 Difference]: Finished difference. Result has 362 places, 726 transitions, 11520 flow [2024-06-27 23:23:55,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11126, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11520, PETRI_PLACES=362, PETRI_TRANSITIONS=726} [2024-06-27 23:23:55,935 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 318 predicate places. [2024-06-27 23:23:55,935 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 726 transitions, 11520 flow [2024-06-27 23:23:55,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:55,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:23:55,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:23:55,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 23:23:55,935 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)] === [2024-06-27 23:23:55,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:23:55,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1548962741, now seen corresponding path program 6 times [2024-06-27 23:23:55,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:23:55,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243801640] [2024-06-27 23:23:55,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:23:55,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:23:55,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:23:59,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:23:59,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:23:59,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243801640] [2024-06-27 23:23:59,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243801640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:23:59,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:23:59,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:23:59,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863408848] [2024-06-27 23:23:59,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:23:59,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:23:59,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:23:59,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:23:59,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:23:59,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:23:59,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 726 transitions, 11520 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:59,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:23:59,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:23:59,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:24:02,216 INFO L124 PetriNetUnfolderBase]: 4835/7484 cut-off events. [2024-06-27 23:24:02,216 INFO L125 PetriNetUnfolderBase]: For 1676098/1676149 co-relation queries the response was YES. [2024-06-27 23:24:02,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87436 conditions, 7484 events. 4835/7484 cut-off events. For 1676098/1676149 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 44223 event pairs, 1028 based on Foata normal form. 17/7440 useless extension candidates. Maximal degree in co-relation 87261. Up to 6179 conditions per place. [2024-06-27 23:24:02,355 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 527 selfloop transitions, 237 changer transitions 0/777 dead transitions. [2024-06-27 23:24:02,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 777 transitions, 14252 flow [2024-06-27 23:24:02,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:24:02,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:24:02,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-27 23:24:02,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 23:24:02,357 INFO L175 Difference]: Start difference. First operand has 362 places, 726 transitions, 11520 flow. Second operand 11 states and 220 transitions. [2024-06-27 23:24:02,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 777 transitions, 14252 flow [2024-06-27 23:24:05,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 777 transitions, 13864 flow, removed 58 selfloop flow, removed 10 redundant places. [2024-06-27 23:24:05,344 INFO L231 Difference]: Finished difference. Result has 363 places, 726 transitions, 11632 flow [2024-06-27 23:24:05,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11132, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11632, PETRI_PLACES=363, PETRI_TRANSITIONS=726} [2024-06-27 23:24:05,345 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 319 predicate places. [2024-06-27 23:24:05,345 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 726 transitions, 11632 flow [2024-06-27 23:24:05,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:05,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:24:05,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:24:05,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 23:24:05,346 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)] === [2024-06-27 23:24:05,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:24:05,346 INFO L85 PathProgramCache]: Analyzing trace with hash -142471188, now seen corresponding path program 8 times [2024-06-27 23:24:05,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:24:05,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059221416] [2024-06-27 23:24:05,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:24:05,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:24:05,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:24:09,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:24:09,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:24:09,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059221416] [2024-06-27 23:24:09,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059221416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:24:09,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:24:09,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:24:09,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557498255] [2024-06-27 23:24:09,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:24:09,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:24:09,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:24:09,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:24:09,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:24:09,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:24:09,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 726 transitions, 11632 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:09,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:24:09,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:24:09,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:24:12,543 INFO L124 PetriNetUnfolderBase]: 4817/7442 cut-off events. [2024-06-27 23:24:12,543 INFO L125 PetriNetUnfolderBase]: For 1682691/1682750 co-relation queries the response was YES. [2024-06-27 23:24:12,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87359 conditions, 7442 events. 4817/7442 cut-off events. For 1682691/1682750 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 43764 event pairs, 1081 based on Foata normal form. 16/7383 useless extension candidates. Maximal degree in co-relation 87182. Up to 6521 conditions per place. [2024-06-27 23:24:12,661 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 583 selfloop transitions, 174 changer transitions 0/770 dead transitions. [2024-06-27 23:24:12,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 770 transitions, 13581 flow [2024-06-27 23:24:12,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:24:12,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:24:12,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-27 23:24:12,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46744186046511627 [2024-06-27 23:24:12,664 INFO L175 Difference]: Start difference. First operand has 363 places, 726 transitions, 11632 flow. Second operand 10 states and 201 transitions. [2024-06-27 23:24:12,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 770 transitions, 13581 flow [2024-06-27 23:24:14,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 770 transitions, 12762 flow, removed 120 selfloop flow, removed 10 redundant places. [2024-06-27 23:24:14,877 INFO L231 Difference]: Finished difference. Result has 363 places, 726 transitions, 11183 flow [2024-06-27 23:24:14,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10813, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11183, PETRI_PLACES=363, PETRI_TRANSITIONS=726} [2024-06-27 23:24:14,878 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 319 predicate places. [2024-06-27 23:24:14,878 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 726 transitions, 11183 flow [2024-06-27 23:24:14,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:14,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:24:14,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:24:14,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 23:24:14,892 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)] === [2024-06-27 23:24:14,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:24:14,893 INFO L85 PathProgramCache]: Analyzing trace with hash -244883363, now seen corresponding path program 7 times [2024-06-27 23:24:14,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:24:14,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200485846] [2024-06-27 23:24:14,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:24:14,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:24:14,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:24:17,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:24:17,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:24:17,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200485846] [2024-06-27 23:24:17,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200485846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:24:17,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:24:17,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 23:24:17,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873142594] [2024-06-27 23:24:17,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:24:17,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 23:24:17,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:24:17,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 23:24:17,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 23:24:18,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:24:18,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 726 transitions, 11183 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:18,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:24:18,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:24:18,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:24:20,707 INFO L124 PetriNetUnfolderBase]: 4887/7552 cut-off events. [2024-06-27 23:24:20,708 INFO L125 PetriNetUnfolderBase]: For 1689640/1689678 co-relation queries the response was YES. [2024-06-27 23:24:20,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87079 conditions, 7552 events. 4887/7552 cut-off events. For 1689640/1689678 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 44588 event pairs, 1118 based on Foata normal form. 11/7507 useless extension candidates. Maximal degree in co-relation 86903. Up to 6574 conditions per place. [2024-06-27 23:24:20,821 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 603 selfloop transitions, 163 changer transitions 0/779 dead transitions. [2024-06-27 23:24:20,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 779 transitions, 14108 flow [2024-06-27 23:24:20,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:24:20,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:24:20,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-27 23:24:20,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45813953488372094 [2024-06-27 23:24:20,822 INFO L175 Difference]: Start difference. First operand has 363 places, 726 transitions, 11183 flow. Second operand 10 states and 197 transitions. [2024-06-27 23:24:20,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 779 transitions, 14108 flow [2024-06-27 23:24:23,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 779 transitions, 13762 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-27 23:24:23,213 INFO L231 Difference]: Finished difference. Result has 365 places, 735 transitions, 11472 flow [2024-06-27 23:24:23,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10845, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11472, PETRI_PLACES=365, PETRI_TRANSITIONS=735} [2024-06-27 23:24:23,213 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 321 predicate places. [2024-06-27 23:24:23,213 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 735 transitions, 11472 flow [2024-06-27 23:24:23,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:23,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:24:23,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:24:23,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 23:24:23,214 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)] === [2024-06-27 23:24:23,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:24:23,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1635798546, now seen corresponding path program 9 times [2024-06-27 23:24:23,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:24:23,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892002861] [2024-06-27 23:24:23,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:24:23,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:24:23,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:24:26,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:24:26,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:24:26,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892002861] [2024-06-27 23:24:26,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892002861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:24:26,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:24:26,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:24:26,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446633600] [2024-06-27 23:24:26,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:24:26,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:24:26,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:24:26,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:24:26,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:24:27,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:24:27,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 735 transitions, 11472 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:27,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:24:27,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:24:27,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:24:29,546 INFO L124 PetriNetUnfolderBase]: 4869/7518 cut-off events. [2024-06-27 23:24:29,546 INFO L125 PetriNetUnfolderBase]: For 1654003/1654048 co-relation queries the response was YES. [2024-06-27 23:24:29,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86441 conditions, 7518 events. 4869/7518 cut-off events. For 1654003/1654048 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 44307 event pairs, 1156 based on Foata normal form. 8/7459 useless extension candidates. Maximal degree in co-relation 86263. Up to 6821 conditions per place. [2024-06-27 23:24:29,673 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 652 selfloop transitions, 105 changer transitions 0/770 dead transitions. [2024-06-27 23:24:29,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 770 transitions, 13283 flow [2024-06-27 23:24:29,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:24:29,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:24:29,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 23:24:29,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-27 23:24:29,700 INFO L175 Difference]: Start difference. First operand has 365 places, 735 transitions, 11472 flow. Second operand 9 states and 178 transitions. [2024-06-27 23:24:29,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 770 transitions, 13283 flow [2024-06-27 23:24:32,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 770 transitions, 12715 flow, removed 148 selfloop flow, removed 7 redundant places. [2024-06-27 23:24:32,523 INFO L231 Difference]: Finished difference. Result has 367 places, 735 transitions, 11131 flow [2024-06-27 23:24:32,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10904, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=630, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11131, PETRI_PLACES=367, PETRI_TRANSITIONS=735} [2024-06-27 23:24:32,524 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 323 predicate places. [2024-06-27 23:24:32,524 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 735 transitions, 11131 flow [2024-06-27 23:24:32,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:32,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:24:32,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:24:32,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 23:24:32,525 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)] === [2024-06-27 23:24:32,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:24:32,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1635804281, now seen corresponding path program 8 times [2024-06-27 23:24:32,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:24:32,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564195235] [2024-06-27 23:24:32,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:24:32,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:24:32,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:24:35,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:24:35,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:24:35,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564195235] [2024-06-27 23:24:35,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564195235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:24:35,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:24:35,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:24:35,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125364304] [2024-06-27 23:24:35,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:24:35,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:24:35,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:24:35,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:24:35,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:24:35,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:24:35,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 735 transitions, 11131 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:35,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:24:35,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:24:35,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:24:38,153 INFO L124 PetriNetUnfolderBase]: 4855/7508 cut-off events. [2024-06-27 23:24:38,153 INFO L125 PetriNetUnfolderBase]: For 1654235/1654273 co-relation queries the response was YES. [2024-06-27 23:24:38,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84778 conditions, 7508 events. 4855/7508 cut-off events. For 1654235/1654273 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 44348 event pairs, 1125 based on Foata normal form. 11/7463 useless extension candidates. Maximal degree in co-relation 84600. Up to 6659 conditions per place. [2024-06-27 23:24:38,279 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 620 selfloop transitions, 141 changer transitions 0/774 dead transitions. [2024-06-27 23:24:38,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 774 transitions, 13373 flow [2024-06-27 23:24:38,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:24:38,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:24:38,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-27 23:24:38,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-27 23:24:38,281 INFO L175 Difference]: Start difference. First operand has 367 places, 735 transitions, 11131 flow. Second operand 10 states and 202 transitions. [2024-06-27 23:24:38,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 774 transitions, 13373 flow [2024-06-27 23:24:41,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 774 transitions, 13030 flow, removed 73 selfloop flow, removed 7 redundant places. [2024-06-27 23:24:41,144 INFO L231 Difference]: Finished difference. Result has 370 places, 735 transitions, 11110 flow [2024-06-27 23:24:41,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10792, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11110, PETRI_PLACES=370, PETRI_TRANSITIONS=735} [2024-06-27 23:24:41,144 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 326 predicate places. [2024-06-27 23:24:41,145 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 735 transitions, 11110 flow [2024-06-27 23:24:41,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:41,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:24:41,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:24:41,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 23:24:41,145 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:24:41,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:24:41,145 INFO L85 PathProgramCache]: Analyzing trace with hash 914863255, now seen corresponding path program 9 times [2024-06-27 23:24:41,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:24:41,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373539454] [2024-06-27 23:24:41,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:24:41,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:24:41,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:24:44,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:24:44,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:24:44,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373539454] [2024-06-27 23:24:44,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373539454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:24:44,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:24:44,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:24:44,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201637694] [2024-06-27 23:24:44,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:24:44,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:24:44,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:24:44,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:24:44,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:24:44,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:24:44,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 735 transitions, 11110 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:44,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:24:44,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:24:44,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:24:46,903 INFO L124 PetriNetUnfolderBase]: 4893/7569 cut-off events. [2024-06-27 23:24:46,903 INFO L125 PetriNetUnfolderBase]: For 1619281/1619324 co-relation queries the response was YES. [2024-06-27 23:24:46,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85073 conditions, 7569 events. 4893/7569 cut-off events. For 1619281/1619324 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 44683 event pairs, 1006 based on Foata normal form. 15/7541 useless extension candidates. Maximal degree in co-relation 84893. Up to 5957 conditions per place. [2024-06-27 23:24:47,025 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 490 selfloop transitions, 303 changer transitions 0/806 dead transitions. [2024-06-27 23:24:47,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 806 transitions, 15195 flow [2024-06-27 23:24:47,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:24:47,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:24:47,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-27 23:24:47,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.513953488372093 [2024-06-27 23:24:47,027 INFO L175 Difference]: Start difference. First operand has 370 places, 735 transitions, 11110 flow. Second operand 10 states and 221 transitions. [2024-06-27 23:24:47,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 806 transitions, 15195 flow [2024-06-27 23:24:49,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 806 transitions, 14818 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-27 23:24:49,993 INFO L231 Difference]: Finished difference. Result has 372 places, 750 transitions, 11996 flow [2024-06-27 23:24:49,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10749, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=291, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11996, PETRI_PLACES=372, PETRI_TRANSITIONS=750} [2024-06-27 23:24:49,994 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 328 predicate places. [2024-06-27 23:24:49,994 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 750 transitions, 11996 flow [2024-06-27 23:24:49,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:49,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:24:49,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:24:49,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 23:24:49,995 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:24:49,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:24:49,995 INFO L85 PathProgramCache]: Analyzing trace with hash 914857520, now seen corresponding path program 10 times [2024-06-27 23:24:49,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:24:49,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111790113] [2024-06-27 23:24:49,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:24:49,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:24:50,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:24:53,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:24:53,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:24:53,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111790113] [2024-06-27 23:24:53,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111790113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:24:53,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:24:53,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:24:53,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10283435] [2024-06-27 23:24:53,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:24:53,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:24:53,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:24:53,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:24:53,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:24:53,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:24:53,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 750 transitions, 11996 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:53,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:24:53,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:24:53,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:24:56,544 INFO L124 PetriNetUnfolderBase]: 4898/7580 cut-off events. [2024-06-27 23:24:56,544 INFO L125 PetriNetUnfolderBase]: For 1625389/1625443 co-relation queries the response was YES. [2024-06-27 23:24:56,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86751 conditions, 7580 events. 4898/7580 cut-off events. For 1625389/1625443 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 44776 event pairs, 1011 based on Foata normal form. 16/7557 useless extension candidates. Maximal degree in co-relation 86569. Up to 6682 conditions per place. [2024-06-27 23:24:56,707 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 610 selfloop transitions, 167 changer transitions 0/790 dead transitions. [2024-06-27 23:24:56,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 790 transitions, 14049 flow [2024-06-27 23:24:56,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:24:56,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:24:56,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-27 23:24:56,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4728682170542636 [2024-06-27 23:24:56,709 INFO L175 Difference]: Start difference. First operand has 372 places, 750 transitions, 11996 flow. Second operand 9 states and 183 transitions. [2024-06-27 23:24:56,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 790 transitions, 14049 flow [2024-06-27 23:24:59,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 790 transitions, 13830 flow, removed 93 selfloop flow, removed 3 redundant places. [2024-06-27 23:24:59,984 INFO L231 Difference]: Finished difference. Result has 378 places, 752 transitions, 12214 flow [2024-06-27 23:24:59,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11779, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=750, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12214, PETRI_PLACES=378, PETRI_TRANSITIONS=752} [2024-06-27 23:24:59,985 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 334 predicate places. [2024-06-27 23:24:59,985 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 752 transitions, 12214 flow [2024-06-27 23:24:59,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:59,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:24:59,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:24:59,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 23:24:59,986 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:24:59,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:24:59,987 INFO L85 PathProgramCache]: Analyzing trace with hash -106355213, now seen corresponding path program 10 times [2024-06-27 23:24:59,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:24:59,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145330885] [2024-06-27 23:24:59,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:24:59,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:25:00,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:25:03,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:25:03,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:25:03,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145330885] [2024-06-27 23:25:03,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145330885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:25:03,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:25:03,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 23:25:03,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357117318] [2024-06-27 23:25:03,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:25:03,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 23:25:03,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:25:03,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 23:25:03,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 23:25:03,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:25:03,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 752 transitions, 12214 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:03,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:25:03,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:25:03,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:25:06,026 INFO L124 PetriNetUnfolderBase]: 4933/7635 cut-off events. [2024-06-27 23:25:06,026 INFO L125 PetriNetUnfolderBase]: For 1655850/1655904 co-relation queries the response was YES. [2024-06-27 23:25:06,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87574 conditions, 7635 events. 4933/7635 cut-off events. For 1655850/1655904 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 45184 event pairs, 1006 based on Foata normal form. 24/7617 useless extension candidates. Maximal degree in co-relation 87391. Up to 5978 conditions per place. [2024-06-27 23:25:06,196 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 494 selfloop transitions, 305 changer transitions 0/812 dead transitions. [2024-06-27 23:25:06,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 812 transitions, 15947 flow [2024-06-27 23:25:06,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:25:06,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:25:06,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-06-27 23:25:06,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49767441860465117 [2024-06-27 23:25:06,198 INFO L175 Difference]: Start difference. First operand has 378 places, 752 transitions, 12214 flow. Second operand 10 states and 214 transitions. [2024-06-27 23:25:06,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 812 transitions, 15947 flow [2024-06-27 23:25:10,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 812 transitions, 15530 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-27 23:25:10,524 INFO L231 Difference]: Finished difference. Result has 381 places, 755 transitions, 12531 flow [2024-06-27 23:25:10,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11797, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=302, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12531, PETRI_PLACES=381, PETRI_TRANSITIONS=755} [2024-06-27 23:25:10,525 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 337 predicate places. [2024-06-27 23:25:10,525 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 755 transitions, 12531 flow [2024-06-27 23:25:10,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:10,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:25:10,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:25:10,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 23:25:10,526 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:25:10,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:25:10,527 INFO L85 PathProgramCache]: Analyzing trace with hash -106499363, now seen corresponding path program 11 times [2024-06-27 23:25:10,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:25:10,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507681318] [2024-06-27 23:25:10,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:25:10,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:25:10,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:25:14,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:25:14,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:25:14,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507681318] [2024-06-27 23:25:14,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507681318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:25:14,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:25:14,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 23:25:14,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584516063] [2024-06-27 23:25:14,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:25:14,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 23:25:14,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:25:14,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 23:25:14,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 23:25:14,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:25:14,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 755 transitions, 12531 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:14,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:25:14,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:25:14,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:25:17,431 INFO L124 PetriNetUnfolderBase]: 5002/7740 cut-off events. [2024-06-27 23:25:17,431 INFO L125 PetriNetUnfolderBase]: For 1720927/1720974 co-relation queries the response was YES. [2024-06-27 23:25:17,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90463 conditions, 7740 events. 5002/7740 cut-off events. For 1720927/1720974 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 45974 event pairs, 1008 based on Foata normal form. 14/7711 useless extension candidates. Maximal degree in co-relation 90278. Up to 5923 conditions per place. [2024-06-27 23:25:17,565 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 487 selfloop transitions, 314 changer transitions 0/814 dead transitions. [2024-06-27 23:25:17,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 814 transitions, 16338 flow [2024-06-27 23:25:17,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:25:17,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:25:17,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-27 23:25:17,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49534883720930234 [2024-06-27 23:25:17,567 INFO L175 Difference]: Start difference. First operand has 381 places, 755 transitions, 12531 flow. Second operand 10 states and 213 transitions. [2024-06-27 23:25:17,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 814 transitions, 16338 flow [2024-06-27 23:25:21,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 814 transitions, 15636 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-27 23:25:21,528 INFO L231 Difference]: Finished difference. Result has 383 places, 761 transitions, 12703 flow [2024-06-27 23:25:21,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11829, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=755, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=311, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12703, PETRI_PLACES=383, PETRI_TRANSITIONS=761} [2024-06-27 23:25:21,528 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 339 predicate places. [2024-06-27 23:25:21,528 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 761 transitions, 12703 flow [2024-06-27 23:25:21,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:21,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:25:21,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:25:21,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 23:25:21,529 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:25:21,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:25:21,529 INFO L85 PathProgramCache]: Analyzing trace with hash -106499518, now seen corresponding path program 11 times [2024-06-27 23:25:21,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:25:21,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288269289] [2024-06-27 23:25:21,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:25:21,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:25:21,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:25:25,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:25:25,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:25:25,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288269289] [2024-06-27 23:25:25,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288269289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:25:25,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:25:25,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 23:25:25,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561137485] [2024-06-27 23:25:25,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:25:25,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 23:25:25,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:25:25,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 23:25:25,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 23:25:25,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:25:25,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 761 transitions, 12703 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:25,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:25:25,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:25:25,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:25:28,192 INFO L124 PetriNetUnfolderBase]: 5024/7770 cut-off events. [2024-06-27 23:25:28,192 INFO L125 PetriNetUnfolderBase]: For 1778545/1778600 co-relation queries the response was YES. [2024-06-27 23:25:28,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91694 conditions, 7770 events. 5024/7770 cut-off events. For 1778545/1778600 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 46115 event pairs, 1019 based on Foata normal form. 16/7745 useless extension candidates. Maximal degree in co-relation 91508. Up to 6818 conditions per place. [2024-06-27 23:25:28,334 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 614 selfloop transitions, 173 changer transitions 0/800 dead transitions. [2024-06-27 23:25:28,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 800 transitions, 14760 flow [2024-06-27 23:25:28,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:25:28,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:25:28,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-27 23:25:28,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-27 23:25:28,336 INFO L175 Difference]: Start difference. First operand has 383 places, 761 transitions, 12703 flow. Second operand 10 states and 194 transitions. [2024-06-27 23:25:28,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 800 transitions, 14760 flow [2024-06-27 23:25:32,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 800 transitions, 14289 flow, removed 72 selfloop flow, removed 6 redundant places. [2024-06-27 23:25:32,319 INFO L231 Difference]: Finished difference. Result has 387 places, 763 transitions, 12687 flow [2024-06-27 23:25:32,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12232, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=761, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12687, PETRI_PLACES=387, PETRI_TRANSITIONS=763} [2024-06-27 23:25:32,319 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 343 predicate places. [2024-06-27 23:25:32,320 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 763 transitions, 12687 flow [2024-06-27 23:25:32,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:32,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:25:32,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:25:32,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 23:25:32,320 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:25:32,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:25:32,321 INFO L85 PathProgramCache]: Analyzing trace with hash -106503238, now seen corresponding path program 12 times [2024-06-27 23:25:32,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:25:32,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873231010] [2024-06-27 23:25:32,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:25:32,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:25:32,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:25:35,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:25:35,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:25:35,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873231010] [2024-06-27 23:25:35,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873231010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:25:35,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:25:35,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:25:35,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569209565] [2024-06-27 23:25:35,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:25:35,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:25:35,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:25:35,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:25:35,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:25:35,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:25:35,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 763 transitions, 12687 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:35,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:25:35,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:25:35,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:25:38,832 INFO L124 PetriNetUnfolderBase]: 5049/7816 cut-off events. [2024-06-27 23:25:38,833 INFO L125 PetriNetUnfolderBase]: For 1819741/1819806 co-relation queries the response was YES. [2024-06-27 23:25:38,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92870 conditions, 7816 events. 5049/7816 cut-off events. For 1819741/1819806 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 46456 event pairs, 1015 based on Foata normal form. 16/7792 useless extension candidates. Maximal degree in co-relation 92682. Up to 6775 conditions per place. [2024-06-27 23:25:38,958 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 615 selfloop transitions, 179 changer transitions 0/807 dead transitions. [2024-06-27 23:25:38,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 807 transitions, 15238 flow [2024-06-27 23:25:38,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:25:38,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:25:38,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-27 23:25:38,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48320413436692505 [2024-06-27 23:25:38,964 INFO L175 Difference]: Start difference. First operand has 387 places, 763 transitions, 12687 flow. Second operand 9 states and 187 transitions. [2024-06-27 23:25:38,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 807 transitions, 15238 flow [2024-06-27 23:25:42,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 807 transitions, 14801 flow, removed 47 selfloop flow, removed 8 redundant places. [2024-06-27 23:25:42,186 INFO L231 Difference]: Finished difference. Result has 388 places, 767 transitions, 12823 flow [2024-06-27 23:25:42,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12250, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=763, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12823, PETRI_PLACES=388, PETRI_TRANSITIONS=767} [2024-06-27 23:25:42,187 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 344 predicate places. [2024-06-27 23:25:42,187 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 767 transitions, 12823 flow [2024-06-27 23:25:42,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:42,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:25:42,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:25:42,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 23:25:42,188 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:25:42,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:25:42,188 INFO L85 PathProgramCache]: Analyzing trace with hash -100987253, now seen corresponding path program 12 times [2024-06-27 23:25:42,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:25:42,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365106941] [2024-06-27 23:25:42,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:25:42,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:25:42,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:25:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:25:45,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:25:45,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365106941] [2024-06-27 23:25:45,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365106941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:25:45,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:25:45,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:25:45,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397997462] [2024-06-27 23:25:45,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:25:45,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:25:45,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:25:45,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:25:45,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:25:45,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:25:45,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 767 transitions, 12823 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:45,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:25:45,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:25:45,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:25:48,014 INFO L124 PetriNetUnfolderBase]: 5097/7891 cut-off events. [2024-06-27 23:25:48,014 INFO L125 PetriNetUnfolderBase]: For 1865402/1865467 co-relation queries the response was YES. [2024-06-27 23:25:48,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93938 conditions, 7891 events. 5097/7891 cut-off events. For 1865402/1865467 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 47031 event pairs, 1015 based on Foata normal form. 25/7873 useless extension candidates. Maximal degree in co-relation 93750. Up to 6255 conditions per place. [2024-06-27 23:25:48,154 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 505 selfloop transitions, 314 changer transitions 0/832 dead transitions. [2024-06-27 23:25:48,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 832 transitions, 16737 flow [2024-06-27 23:25:48,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:25:48,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:25:48,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 220 transitions. [2024-06-27 23:25:48,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5116279069767442 [2024-06-27 23:25:48,156 INFO L175 Difference]: Start difference. First operand has 388 places, 767 transitions, 12823 flow. Second operand 10 states and 220 transitions. [2024-06-27 23:25:48,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 832 transitions, 16737 flow [2024-06-27 23:25:51,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 832 transitions, 16389 flow, removed 73 selfloop flow, removed 5 redundant places. [2024-06-27 23:25:51,577 INFO L231 Difference]: Finished difference. Result has 393 places, 773 transitions, 13277 flow [2024-06-27 23:25:51,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12475, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=308, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13277, PETRI_PLACES=393, PETRI_TRANSITIONS=773} [2024-06-27 23:25:51,577 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 349 predicate places. [2024-06-27 23:25:51,577 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 773 transitions, 13277 flow [2024-06-27 23:25:51,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:51,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:25:51,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:25:51,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 23:25:51,578 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:25:51,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:25:51,579 INFO L85 PathProgramCache]: Analyzing trace with hash -100992833, now seen corresponding path program 13 times [2024-06-27 23:25:51,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:25:51,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625330178] [2024-06-27 23:25:51,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:25:51,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:25:51,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:25:54,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:25:54,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:25:54,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625330178] [2024-06-27 23:25:54,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625330178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:25:54,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:25:54,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 23:25:54,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019954434] [2024-06-27 23:25:54,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:25:54,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 23:25:54,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:25:54,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 23:25:54,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 23:25:55,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:25:55,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 773 transitions, 13277 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:55,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:25:55,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:25:55,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:25:57,961 INFO L124 PetriNetUnfolderBase]: 5133/7943 cut-off events. [2024-06-27 23:25:57,962 INFO L125 PetriNetUnfolderBase]: For 1901528/1901593 co-relation queries the response was YES. [2024-06-27 23:25:58,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95639 conditions, 7943 events. 5133/7943 cut-off events. For 1901528/1901593 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 47433 event pairs, 1013 based on Foata normal form. 24/7923 useless extension candidates. Maximal degree in co-relation 95448. Up to 6210 conditions per place. [2024-06-27 23:25:58,099 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 501 selfloop transitions, 319 changer transitions 0/833 dead transitions. [2024-06-27 23:25:58,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 833 transitions, 17108 flow [2024-06-27 23:25:58,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:25:58,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:25:58,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-27 23:25:58,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4906976744186046 [2024-06-27 23:25:58,101 INFO L175 Difference]: Start difference. First operand has 393 places, 773 transitions, 13277 flow. Second operand 10 states and 211 transitions. [2024-06-27 23:25:58,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 833 transitions, 17108 flow [2024-06-27 23:26:01,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 833 transitions, 16516 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-27 23:26:01,761 INFO L231 Difference]: Finished difference. Result has 397 places, 776 transitions, 13417 flow [2024-06-27 23:26:01,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12685, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=773, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=316, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13417, PETRI_PLACES=397, PETRI_TRANSITIONS=776} [2024-06-27 23:26:01,774 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 353 predicate places. [2024-06-27 23:26:01,774 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 776 transitions, 13417 flow [2024-06-27 23:26:01,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:26:01,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:26:01,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:26:01,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 23:26:01,775 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:26:01,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:26:01,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1015866931, now seen corresponding path program 14 times [2024-06-27 23:26:01,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:26:01,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138683570] [2024-06-27 23:26:01,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:26:01,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:26:01,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:26:04,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:26:04,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:26:04,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138683570] [2024-06-27 23:26:04,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138683570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:26:04,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:26:04,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:26:04,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155092425] [2024-06-27 23:26:04,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:26:04,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:26:04,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:26:04,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:26:04,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:26:04,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:26:04,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 776 transitions, 13417 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:26:04,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:26:04,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:26:04,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:26:08,002 INFO L124 PetriNetUnfolderBase]: 5140/7951 cut-off events. [2024-06-27 23:26:08,002 INFO L125 PetriNetUnfolderBase]: For 1929666/1929721 co-relation queries the response was YES. [2024-06-27 23:26:08,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95731 conditions, 7951 events. 5140/7951 cut-off events. For 1929666/1929721 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 47467 event pairs, 1013 based on Foata normal form. 15/7920 useless extension candidates. Maximal degree in co-relation 95539. Up to 6320 conditions per place. [2024-06-27 23:26:08,171 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 490 selfloop transitions, 326 changer transitions 0/829 dead transitions. [2024-06-27 23:26:08,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 829 transitions, 16750 flow [2024-06-27 23:26:08,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:26:08,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:26:08,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-27 23:26:08,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023255813953489 [2024-06-27 23:26:08,173 INFO L175 Difference]: Start difference. First operand has 397 places, 776 transitions, 13417 flow. Second operand 10 states and 216 transitions. [2024-06-27 23:26:08,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 829 transitions, 16750 flow [2024-06-27 23:26:11,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 829 transitions, 16086 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-27 23:26:11,728 INFO L231 Difference]: Finished difference. Result has 400 places, 776 transitions, 13418 flow [2024-06-27 23:26:11,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12753, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=776, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=326, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13418, PETRI_PLACES=400, PETRI_TRANSITIONS=776} [2024-06-27 23:26:11,729 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 356 predicate places. [2024-06-27 23:26:11,729 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 776 transitions, 13418 flow [2024-06-27 23:26:11,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:26:11,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:26:11,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:26:11,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 23:26:11,730 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:26:11,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:26:11,730 INFO L85 PathProgramCache]: Analyzing trace with hash -100992988, now seen corresponding path program 13 times [2024-06-27 23:26:11,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:26:11,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396812988] [2024-06-27 23:26:11,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:26:11,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:26:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:26:15,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:26:15,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:26:15,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396812988] [2024-06-27 23:26:15,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396812988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:26:15,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:26:15,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:26:15,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929950775] [2024-06-27 23:26:15,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:26:15,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:26:15,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:26:15,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:26:15,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:26:15,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:26:15,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 776 transitions, 13418 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:26:15,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:26:15,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:26:15,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:26:18,334 INFO L124 PetriNetUnfolderBase]: 5120/7921 cut-off events. [2024-06-27 23:26:18,335 INFO L125 PetriNetUnfolderBase]: For 1940458/1940513 co-relation queries the response was YES. [2024-06-27 23:26:18,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95047 conditions, 7921 events. 5120/7921 cut-off events. For 1940458/1940513 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 47173 event pairs, 1017 based on Foata normal form. 16/7895 useless extension candidates. Maximal degree in co-relation 94854. Up to 7012 conditions per place. [2024-06-27 23:26:18,478 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 626 selfloop transitions, 175 changer transitions 0/814 dead transitions. [2024-06-27 23:26:18,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 814 transitions, 15427 flow [2024-06-27 23:26:18,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:26:18,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:26:18,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-27 23:26:18,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-27 23:26:18,480 INFO L175 Difference]: Start difference. First operand has 400 places, 776 transitions, 13418 flow. Second operand 9 states and 182 transitions. [2024-06-27 23:26:18,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 814 transitions, 15427 flow [2024-06-27 23:26:23,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 814 transitions, 14895 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-27 23:26:23,029 INFO L231 Difference]: Finished difference. Result has 402 places, 776 transitions, 13243 flow [2024-06-27 23:26:23,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12886, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=776, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13243, PETRI_PLACES=402, PETRI_TRANSITIONS=776} [2024-06-27 23:26:23,029 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 358 predicate places. [2024-06-27 23:26:23,029 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 776 transitions, 13243 flow [2024-06-27 23:26:23,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:26:23,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:26:23,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:26:23,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 23:26:23,030 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:26:23,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:26:23,030 INFO L85 PathProgramCache]: Analyzing trace with hash -100777507, now seen corresponding path program 1 times [2024-06-27 23:26:23,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:26:23,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155997364] [2024-06-27 23:26:23,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:26:23,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:26:23,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:26:25,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:26:25,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:26:25,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155997364] [2024-06-27 23:26:25,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155997364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:26:25,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:26:25,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:26:25,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453041288] [2024-06-27 23:26:25,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:26:25,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:26:25,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:26:25,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:26:25,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:26:26,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:26:26,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 776 transitions, 13243 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:26:26,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:26:26,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:26:26,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:26:28,988 INFO L124 PetriNetUnfolderBase]: 5654/8517 cut-off events. [2024-06-27 23:26:28,988 INFO L125 PetriNetUnfolderBase]: For 1965487/1965506 co-relation queries the response was YES. [2024-06-27 23:26:29,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97896 conditions, 8517 events. 5654/8517 cut-off events. For 1965487/1965506 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 48357 event pairs, 1313 based on Foata normal form. 4/8496 useless extension candidates. Maximal degree in co-relation 97703. Up to 7859 conditions per place. [2024-06-27 23:26:29,136 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 701 selfloop transitions, 120 changer transitions 0/832 dead transitions. [2024-06-27 23:26:29,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 832 transitions, 15458 flow [2024-06-27 23:26:29,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:26:29,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:26:29,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-27 23:26:29,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-27 23:26:29,138 INFO L175 Difference]: Start difference. First operand has 402 places, 776 transitions, 13243 flow. Second operand 10 states and 192 transitions. [2024-06-27 23:26:29,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 832 transitions, 15458 flow [2024-06-27 23:26:33,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 832 transitions, 15089 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 23:26:33,937 INFO L231 Difference]: Finished difference. Result has 406 places, 797 transitions, 13472 flow [2024-06-27 23:26:33,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12874, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=776, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=675, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13472, PETRI_PLACES=406, PETRI_TRANSITIONS=797} [2024-06-27 23:26:33,938 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 362 predicate places. [2024-06-27 23:26:33,938 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 797 transitions, 13472 flow [2024-06-27 23:26:33,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:26:33,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:26:33,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:26:33,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 23:26:33,939 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:26:33,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:26:33,939 INFO L85 PathProgramCache]: Analyzing trace with hash 557042698, now seen corresponding path program 2 times [2024-06-27 23:26:33,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:26:33,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296075774] [2024-06-27 23:26:33,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:26:33,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:26:33,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:26:36,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:26:36,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:26:36,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296075774] [2024-06-27 23:26:36,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296075774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:26:36,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:26:36,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:26:36,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421225017] [2024-06-27 23:26:36,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:26:36,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:26:36,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:26:36,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:26:36,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:26:36,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:26:36,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 797 transitions, 13472 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:26:36,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:26:36,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:26:36,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:26:38,893 INFO L124 PetriNetUnfolderBase]: 5253/8104 cut-off events. [2024-06-27 23:26:38,893 INFO L125 PetriNetUnfolderBase]: For 1920826/1920875 co-relation queries the response was YES. [2024-06-27 23:26:39,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94181 conditions, 8104 events. 5253/8104 cut-off events. For 1920826/1920875 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 47784 event pairs, 1186 based on Foata normal form. 23/8097 useless extension candidates. Maximal degree in co-relation 93984. Up to 7300 conditions per place. [2024-06-27 23:26:39,071 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 643 selfloop transitions, 57 changer transitions 0/826 dead transitions. [2024-06-27 23:26:39,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 826 transitions, 15310 flow [2024-06-27 23:26:39,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:26:39,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:26:39,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 23:26:39,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-27 23:26:39,073 INFO L175 Difference]: Start difference. First operand has 406 places, 797 transitions, 13472 flow. Second operand 8 states and 150 transitions. [2024-06-27 23:26:39,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 826 transitions, 15310 flow [2024-06-27 23:26:43,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 826 transitions, 14616 flow, removed 33 selfloop flow, removed 9 redundant places. [2024-06-27 23:26:43,575 INFO L231 Difference]: Finished difference. Result has 406 places, 807 transitions, 13050 flow [2024-06-27 23:26:43,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12778, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=797, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=743, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13050, PETRI_PLACES=406, PETRI_TRANSITIONS=807} [2024-06-27 23:26:43,576 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 362 predicate places. [2024-06-27 23:26:43,576 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 807 transitions, 13050 flow [2024-06-27 23:26:43,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:26:43,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:26:43,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:26:43,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 23:26:43,577 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:26:43,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:26:43,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1919085117, now seen corresponding path program 15 times [2024-06-27 23:26:43,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:26:43,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877514994] [2024-06-27 23:26:43,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:26:43,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:26:43,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:26:45,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:26:45,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:26:45,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877514994] [2024-06-27 23:26:45,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877514994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:26:45,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:26:45,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:26:45,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015231268] [2024-06-27 23:26:45,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:26:45,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:26:45,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:26:45,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:26:45,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:26:46,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:26:46,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 807 transitions, 13050 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:26:46,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:26:46,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:26:46,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:26:48,664 INFO L124 PetriNetUnfolderBase]: 5197/8041 cut-off events. [2024-06-27 23:26:48,664 INFO L125 PetriNetUnfolderBase]: For 2053423/2053450 co-relation queries the response was YES. [2024-06-27 23:26:48,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96566 conditions, 8041 events. 5197/8041 cut-off events. For 2053423/2053450 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 48075 event pairs, 1530 based on Foata normal form. 4/7990 useless extension candidates. Maximal degree in co-relation 96367. Up to 7060 conditions per place. [2024-06-27 23:26:48,825 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 729 selfloop transitions, 116 changer transitions 0/859 dead transitions. [2024-06-27 23:26:48,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 859 transitions, 16292 flow [2024-06-27 23:26:48,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:26:48,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:26:48,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-27 23:26:48,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 23:26:48,826 INFO L175 Difference]: Start difference. First operand has 406 places, 807 transitions, 13050 flow. Second operand 10 states and 200 transitions. [2024-06-27 23:26:48,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 859 transitions, 16292 flow [2024-06-27 23:26:53,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 859 transitions, 16205 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-27 23:26:53,637 INFO L231 Difference]: Finished difference. Result has 414 places, 817 transitions, 13604 flow [2024-06-27 23:26:53,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12963, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=807, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=694, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13604, PETRI_PLACES=414, PETRI_TRANSITIONS=817} [2024-06-27 23:26:53,637 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 370 predicate places. [2024-06-27 23:26:53,638 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 817 transitions, 13604 flow [2024-06-27 23:26:53,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:26:53,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:26:53,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:26:53,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 23:26:53,639 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:26:53,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:26:53,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1969980218, now seen corresponding path program 14 times [2024-06-27 23:26:53,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:26:53,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729430218] [2024-06-27 23:26:53,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:26:53,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:26:53,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:26:56,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:26:56,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:26:56,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729430218] [2024-06-27 23:26:56,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729430218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:26:56,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:26:56,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:26:56,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837182956] [2024-06-27 23:26:56,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:26:56,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:26:56,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:26:56,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:26:56,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:26:56,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:26:56,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 817 transitions, 13604 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:26:56,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:26:56,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:26:56,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:26:59,363 INFO L124 PetriNetUnfolderBase]: 5234/8096 cut-off events. [2024-06-27 23:26:59,363 INFO L125 PetriNetUnfolderBase]: For 2114819/2114842 co-relation queries the response was YES. [2024-06-27 23:26:59,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99092 conditions, 8096 events. 5234/8096 cut-off events. For 2114819/2114842 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 48403 event pairs, 1540 based on Foata normal form. 4/8046 useless extension candidates. Maximal degree in co-relation 98889. Up to 7437 conditions per place. [2024-06-27 23:26:59,533 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 771 selfloop transitions, 67 changer transitions 0/852 dead transitions. [2024-06-27 23:26:59,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 852 transitions, 15715 flow [2024-06-27 23:26:59,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:26:59,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:26:59,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-27 23:26:59,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43488372093023253 [2024-06-27 23:26:59,535 INFO L175 Difference]: Start difference. First operand has 414 places, 817 transitions, 13604 flow. Second operand 10 states and 187 transitions. [2024-06-27 23:26:59,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 852 transitions, 15715 flow [2024-06-27 23:27:05,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 852 transitions, 15170 flow, removed 128 selfloop flow, removed 7 redundant places. [2024-06-27 23:27:05,203 INFO L231 Difference]: Finished difference. Result has 417 places, 819 transitions, 13312 flow [2024-06-27 23:27:05,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13059, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=817, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=750, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13312, PETRI_PLACES=417, PETRI_TRANSITIONS=819} [2024-06-27 23:27:05,204 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 373 predicate places. [2024-06-27 23:27:05,204 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 819 transitions, 13312 flow [2024-06-27 23:27:05,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:27:05,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:27:05,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:27:05,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 23:27:05,205 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:27:05,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:27:05,205 INFO L85 PathProgramCache]: Analyzing trace with hash 856395347, now seen corresponding path program 16 times [2024-06-27 23:27:05,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:27:05,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811590357] [2024-06-27 23:27:05,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:27:05,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:27:05,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:27:07,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:27:07,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:27:07,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811590357] [2024-06-27 23:27:07,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811590357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:27:07,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:27:07,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:27:07,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384438872] [2024-06-27 23:27:07,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:27:07,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:27:07,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:27:07,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:27:07,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:27:07,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:27:07,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 819 transitions, 13312 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:27:07,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:27:07,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:27:07,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:27:10,646 INFO L124 PetriNetUnfolderBase]: 5244/8116 cut-off events. [2024-06-27 23:27:10,647 INFO L125 PetriNetUnfolderBase]: For 2136796/2136819 co-relation queries the response was YES. [2024-06-27 23:27:10,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98772 conditions, 8116 events. 5244/8116 cut-off events. For 2136796/2136819 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 48630 event pairs, 1533 based on Foata normal form. 5/8069 useless extension candidates. Maximal degree in co-relation 98568. Up to 7445 conditions per place. [2024-06-27 23:27:10,799 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 785 selfloop transitions, 62 changer transitions 0/861 dead transitions. [2024-06-27 23:27:10,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 861 transitions, 15476 flow [2024-06-27 23:27:10,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:27:10,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:27:10,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-27 23:27:10,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43488372093023253 [2024-06-27 23:27:10,801 INFO L175 Difference]: Start difference. First operand has 417 places, 819 transitions, 13312 flow. Second operand 10 states and 187 transitions. [2024-06-27 23:27:10,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 861 transitions, 15476 flow [2024-06-27 23:27:16,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 861 transitions, 15236 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-27 23:27:16,162 INFO L231 Difference]: Finished difference. Result has 422 places, 828 transitions, 13378 flow [2024-06-27 23:27:16,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13072, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=819, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=759, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13378, PETRI_PLACES=422, PETRI_TRANSITIONS=828} [2024-06-27 23:27:16,162 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 378 predicate places. [2024-06-27 23:27:16,162 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 828 transitions, 13378 flow [2024-06-27 23:27:16,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:27:16,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:27:16,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:27:16,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 23:27:16,163 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:27:16,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:27:16,163 INFO L85 PathProgramCache]: Analyzing trace with hash 248346674, now seen corresponding path program 15 times [2024-06-27 23:27:16,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:27:16,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097740719] [2024-06-27 23:27:16,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:27:16,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:27:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:27:18,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:27:18,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:27:18,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097740719] [2024-06-27 23:27:18,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097740719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:27:18,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:27:18,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:27:18,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328777244] [2024-06-27 23:27:18,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:27:18,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:27:18,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:27:18,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:27:18,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:27:18,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:27:18,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 828 transitions, 13378 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:27:18,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:27:18,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:27:18,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:27:21,325 INFO L124 PetriNetUnfolderBase]: 5281/8167 cut-off events. [2024-06-27 23:27:21,326 INFO L125 PetriNetUnfolderBase]: For 2183405/2183428 co-relation queries the response was YES. [2024-06-27 23:27:21,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99989 conditions, 8167 events. 5281/8167 cut-off events. For 2183405/2183428 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 48895 event pairs, 1545 based on Foata normal form. 4/8116 useless extension candidates. Maximal degree in co-relation 99782. Up to 7552 conditions per place. [2024-06-27 23:27:21,481 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 796 selfloop transitions, 55 changer transitions 0/865 dead transitions. [2024-06-27 23:27:21,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 865 transitions, 15546 flow [2024-06-27 23:27:21,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:27:21,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:27:21,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-27 23:27:21,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43488372093023253 [2024-06-27 23:27:21,483 INFO L175 Difference]: Start difference. First operand has 422 places, 828 transitions, 13378 flow. Second operand 10 states and 187 transitions. [2024-06-27 23:27:21,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 865 transitions, 15546 flow [2024-06-27 23:27:26,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 865 transitions, 15467 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-27 23:27:26,302 INFO L231 Difference]: Finished difference. Result has 428 places, 830 transitions, 13532 flow [2024-06-27 23:27:26,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13299, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=828, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=773, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13532, PETRI_PLACES=428, PETRI_TRANSITIONS=830} [2024-06-27 23:27:26,303 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 384 predicate places. [2024-06-27 23:27:26,304 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 830 transitions, 13532 flow [2024-06-27 23:27:26,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:27:26,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:27:26,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:27:26,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 23:27:26,310 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:27:26,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:27:26,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1913371197, now seen corresponding path program 17 times [2024-06-27 23:27:26,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:27:26,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215267470] [2024-06-27 23:27:26,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:27:26,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:27:26,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:27:28,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:27:28,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:27:28,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215267470] [2024-06-27 23:27:28,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215267470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:27:28,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:27:28,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:27:28,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935186977] [2024-06-27 23:27:28,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:27:28,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:27:28,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:27:28,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:27:28,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:27:29,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:27:29,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 830 transitions, 13532 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:27:29,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:27:29,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:27:29,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:27:31,987 INFO L124 PetriNetUnfolderBase]: 5311/8214 cut-off events. [2024-06-27 23:27:31,987 INFO L125 PetriNetUnfolderBase]: For 2230247/2230270 co-relation queries the response was YES. [2024-06-27 23:27:32,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100966 conditions, 8214 events. 5311/8214 cut-off events. For 2230247/2230270 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 49255 event pairs, 1532 based on Foata normal form. 5/8166 useless extension candidates. Maximal degree in co-relation 100757. Up to 7390 conditions per place. [2024-06-27 23:27:32,141 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 756 selfloop transitions, 106 changer transitions 0/876 dead transitions. [2024-06-27 23:27:32,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 876 transitions, 16236 flow [2024-06-27 23:27:32,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:27:32,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:27:32,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-27 23:27:32,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-27 23:27:32,143 INFO L175 Difference]: Start difference. First operand has 428 places, 830 transitions, 13532 flow. Second operand 10 states and 195 transitions. [2024-06-27 23:27:32,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 876 transitions, 16236 flow [2024-06-27 23:27:37,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 876 transitions, 16021 flow, removed 54 selfloop flow, removed 8 redundant places. [2024-06-27 23:27:37,631 INFO L231 Difference]: Finished difference. Result has 430 places, 835 transitions, 13649 flow [2024-06-27 23:27:37,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13317, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=830, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=726, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13649, PETRI_PLACES=430, PETRI_TRANSITIONS=835} [2024-06-27 23:27:37,632 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 386 predicate places. [2024-06-27 23:27:37,632 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 835 transitions, 13649 flow [2024-06-27 23:27:37,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:27:37,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:27:37,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:27:37,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 23:27:37,633 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:27:37,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:27:37,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1113097667, now seen corresponding path program 18 times [2024-06-27 23:27:37,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:27:37,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070809913] [2024-06-27 23:27:37,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:27:37,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:27:37,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:27:40,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:27:40,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:27:40,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070809913] [2024-06-27 23:27:40,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070809913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:27:40,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:27:40,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 23:27:40,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305319809] [2024-06-27 23:27:40,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:27:40,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 23:27:40,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:27:40,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 23:27:40,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 23:27:40,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:27:40,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 835 transitions, 13649 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:27:40,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:27:40,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:27:40,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:27:43,328 INFO L124 PetriNetUnfolderBase]: 5341/8255 cut-off events. [2024-06-27 23:27:43,329 INFO L125 PetriNetUnfolderBase]: For 2270047/2270070 co-relation queries the response was YES. [2024-06-27 23:27:43,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101782 conditions, 8255 events. 5341/8255 cut-off events. For 2270047/2270070 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 49499 event pairs, 1540 based on Foata normal form. 6/8205 useless extension candidates. Maximal degree in co-relation 101572. Up to 7615 conditions per place. [2024-06-27 23:27:43,488 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 816 selfloop transitions, 47 changer transitions 0/877 dead transitions. [2024-06-27 23:27:43,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 877 transitions, 16314 flow [2024-06-27 23:27:43,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:27:43,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:27:43,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 199 transitions. [2024-06-27 23:27:43,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42071881606765327 [2024-06-27 23:27:43,489 INFO L175 Difference]: Start difference. First operand has 430 places, 835 transitions, 13649 flow. Second operand 11 states and 199 transitions. [2024-06-27 23:27:43,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 877 transitions, 16314 flow [2024-06-27 23:27:48,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 877 transitions, 16033 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-27 23:27:48,773 INFO L231 Difference]: Finished difference. Result has 436 places, 842 transitions, 13667 flow [2024-06-27 23:27:48,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13378, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=835, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=788, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13667, PETRI_PLACES=436, PETRI_TRANSITIONS=842} [2024-06-27 23:27:48,774 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 392 predicate places. [2024-06-27 23:27:48,774 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 842 transitions, 13667 flow [2024-06-27 23:27:48,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:27:48,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:27:48,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:27:48,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 23:27:48,774 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:27:48,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:27:48,775 INFO L85 PathProgramCache]: Analyzing trace with hash 248352409, now seen corresponding path program 19 times [2024-06-27 23:27:48,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:27:48,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954766252] [2024-06-27 23:27:48,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:27:48,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:27:48,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:27:51,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:27:51,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:27:51,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954766252] [2024-06-27 23:27:51,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954766252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:27:51,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:27:51,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:27:51,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048135585] [2024-06-27 23:27:51,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:27:51,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:27:51,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:27:51,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:27:51,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:27:51,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:27:51,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 842 transitions, 13667 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:27:51,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:27:51,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:27:51,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:27:54,535 INFO L124 PetriNetUnfolderBase]: 5358/8286 cut-off events. [2024-06-27 23:27:54,535 INFO L125 PetriNetUnfolderBase]: For 2297494/2297517 co-relation queries the response was YES. [2024-06-27 23:27:54,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101799 conditions, 8286 events. 5358/8286 cut-off events. For 2297494/2297517 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 49719 event pairs, 1532 based on Foata normal form. 5/8237 useless extension candidates. Maximal degree in co-relation 101588. Up to 7453 conditions per place. [2024-06-27 23:27:54,703 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 766 selfloop transitions, 110 changer transitions 0/890 dead transitions. [2024-06-27 23:27:54,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 890 transitions, 16468 flow [2024-06-27 23:27:54,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:27:54,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:27:54,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 23:27:54,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-27 23:27:54,705 INFO L175 Difference]: Start difference. First operand has 436 places, 842 transitions, 13667 flow. Second operand 10 states and 196 transitions. [2024-06-27 23:27:54,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 890 transitions, 16468 flow [2024-06-27 23:28:00,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 890 transitions, 16274 flow, removed 41 selfloop flow, removed 8 redundant places. [2024-06-27 23:28:00,209 INFO L231 Difference]: Finished difference. Result has 438 places, 847 transitions, 13823 flow [2024-06-27 23:28:00,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13473, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=842, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=734, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13823, PETRI_PLACES=438, PETRI_TRANSITIONS=847} [2024-06-27 23:28:00,210 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 394 predicate places. [2024-06-27 23:28:00,210 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 847 transitions, 13823 flow [2024-06-27 23:28:00,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:28:00,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:28:00,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:28:00,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 23:28:00,211 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:28:00,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:28:00,211 INFO L85 PathProgramCache]: Analyzing trace with hash 856389612, now seen corresponding path program 16 times [2024-06-27 23:28:00,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:28:00,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730333258] [2024-06-27 23:28:00,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:28:00,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:28:00,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:28:02,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:28:02,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:28:02,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730333258] [2024-06-27 23:28:02,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730333258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:28:02,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:28:02,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 23:28:02,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779302732] [2024-06-27 23:28:02,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:28:02,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 23:28:02,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:28:02,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 23:28:02,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 23:28:02,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:28:02,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 847 transitions, 13823 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:28:02,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:28:02,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:28:02,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:28:06,275 INFO L124 PetriNetUnfolderBase]: 5375/8310 cut-off events. [2024-06-27 23:28:06,275 INFO L125 PetriNetUnfolderBase]: For 2333342/2333365 co-relation queries the response was YES. [2024-06-27 23:28:06,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102452 conditions, 8310 events. 5375/8310 cut-off events. For 2333342/2333365 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 49934 event pairs, 1540 based on Foata normal form. 4/8257 useless extension candidates. Maximal degree in co-relation 102240. Up to 7755 conditions per place. [2024-06-27 23:28:06,415 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 836 selfloop transitions, 30 changer transitions 0/880 dead transitions. [2024-06-27 23:28:06,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 880 transitions, 15956 flow [2024-06-27 23:28:06,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:28:06,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:28:06,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2024-06-27 23:28:06,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4080338266384778 [2024-06-27 23:28:06,417 INFO L175 Difference]: Start difference. First operand has 438 places, 847 transitions, 13823 flow. Second operand 11 states and 193 transitions. [2024-06-27 23:28:06,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 880 transitions, 15956 flow [2024-06-27 23:28:12,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 880 transitions, 15697 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 23:28:12,080 INFO L231 Difference]: Finished difference. Result has 443 places, 849 transitions, 13751 flow [2024-06-27 23:28:12,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13564, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=847, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=817, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13751, PETRI_PLACES=443, PETRI_TRANSITIONS=849} [2024-06-27 23:28:12,081 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 399 predicate places. [2024-06-27 23:28:12,081 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 849 transitions, 13751 flow [2024-06-27 23:28:12,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:28:12,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:28:12,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:28:12,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 23:28:12,081 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:28:12,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:28:12,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1913578587, now seen corresponding path program 20 times [2024-06-27 23:28:12,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:28:12,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97237838] [2024-06-27 23:28:12,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:28:12,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:28:12,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:28:14,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:28:14,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:28:14,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97237838] [2024-06-27 23:28:14,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97237838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:28:14,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:28:14,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 23:28:14,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683148713] [2024-06-27 23:28:14,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:28:14,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 23:28:14,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:28:14,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 23:28:14,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 23:28:14,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:28:14,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 849 transitions, 13751 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:28:14,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:28:14,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:28:14,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:28:18,032 INFO L124 PetriNetUnfolderBase]: 5411/8366 cut-off events. [2024-06-27 23:28:18,032 INFO L125 PetriNetUnfolderBase]: For 2381307/2381330 co-relation queries the response was YES. [2024-06-27 23:28:18,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103253 conditions, 8366 events. 5411/8366 cut-off events. For 2381307/2381330 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 50285 event pairs, 1537 based on Foata normal form. 4/8315 useless extension candidates. Maximal degree in co-relation 103040. Up to 7474 conditions per place. [2024-06-27 23:28:18,198 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 765 selfloop transitions, 117 changer transitions 0/896 dead transitions. [2024-06-27 23:28:18,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 896 transitions, 16580 flow [2024-06-27 23:28:18,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:28:18,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:28:18,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-27 23:28:18,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4397463002114165 [2024-06-27 23:28:18,200 INFO L175 Difference]: Start difference. First operand has 443 places, 849 transitions, 13751 flow. Second operand 11 states and 208 transitions. [2024-06-27 23:28:18,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 896 transitions, 16580 flow [2024-06-27 23:28:22,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 896 transitions, 16411 flow, removed 56 selfloop flow, removed 9 redundant places. [2024-06-27 23:28:22,868 INFO L231 Difference]: Finished difference. Result has 445 places, 852 transitions, 13932 flow [2024-06-27 23:28:22,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13582, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=849, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=732, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13932, PETRI_PLACES=445, PETRI_TRANSITIONS=852} [2024-06-27 23:28:22,868 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 401 predicate places. [2024-06-27 23:28:22,869 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 852 transitions, 13932 flow [2024-06-27 23:28:22,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:28:22,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:28:22,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:28:22,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 23:28:22,869 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:28:22,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:28:22,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1276444723, now seen corresponding path program 21 times [2024-06-27 23:28:22,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:28:22,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582566088] [2024-06-27 23:28:22,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:28:22,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:28:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:28:25,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:28:25,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:28:25,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582566088] [2024-06-27 23:28:25,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582566088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:28:25,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:28:25,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:28:25,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894061031] [2024-06-27 23:28:25,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:28:25,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:28:25,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:28:25,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:28:25,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:28:25,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:28:25,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 852 transitions, 13932 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:28:25,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:28:25,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:28:25,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:28:28,543 INFO L124 PetriNetUnfolderBase]: 5428/8394 cut-off events. [2024-06-27 23:28:28,543 INFO L125 PetriNetUnfolderBase]: For 2420158/2420181 co-relation queries the response was YES. [2024-06-27 23:28:28,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103902 conditions, 8394 events. 5428/8394 cut-off events. For 2420158/2420181 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 50588 event pairs, 1534 based on Foata normal form. 5/8343 useless extension candidates. Maximal degree in co-relation 103688. Up to 7718 conditions per place. [2024-06-27 23:28:28,689 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 814 selfloop transitions, 62 changer transitions 0/890 dead transitions. [2024-06-27 23:28:28,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 890 transitions, 16170 flow [2024-06-27 23:28:28,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:28:28,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:28:28,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-27 23:28:28,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372093023255814 [2024-06-27 23:28:28,691 INFO L175 Difference]: Start difference. First operand has 445 places, 852 transitions, 13932 flow. Second operand 10 states and 188 transitions. [2024-06-27 23:28:28,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 890 transitions, 16170 flow [2024-06-27 23:28:33,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 890 transitions, 15858 flow, removed 41 selfloop flow, removed 9 redundant places. [2024-06-27 23:28:33,594 INFO L231 Difference]: Finished difference. Result has 446 places, 855 transitions, 13867 flow [2024-06-27 23:28:33,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13620, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=852, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=790, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13867, PETRI_PLACES=446, PETRI_TRANSITIONS=855} [2024-06-27 23:28:33,595 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 402 predicate places. [2024-06-27 23:28:33,595 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 855 transitions, 13867 flow [2024-06-27 23:28:33,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:28:33,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:28:33,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:28:33,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 23:28:33,596 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:28:33,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:28:33,596 INFO L85 PathProgramCache]: Analyzing trace with hash 242984294, now seen corresponding path program 17 times [2024-06-27 23:28:33,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:28:33,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945292291] [2024-06-27 23:28:33,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:28:33,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:28:33,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:28:36,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:28:36,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:28:36,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945292291] [2024-06-27 23:28:36,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945292291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:28:36,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:28:36,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:28:36,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332640306] [2024-06-27 23:28:36,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:28:36,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:28:36,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:28:36,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:28:36,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:28:36,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:28:36,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 855 transitions, 13867 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:28:36,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:28:36,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:28:36,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:28:39,849 INFO L124 PetriNetUnfolderBase]: 5458/8434 cut-off events. [2024-06-27 23:28:39,850 INFO L125 PetriNetUnfolderBase]: For 2466085/2466108 co-relation queries the response was YES. [2024-06-27 23:28:39,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104679 conditions, 8434 events. 5458/8434 cut-off events. For 2466085/2466108 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 50787 event pairs, 1545 based on Foata normal form. 4/8379 useless extension candidates. Maximal degree in co-relation 104464. Up to 7810 conditions per place. [2024-06-27 23:28:40,126 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 819 selfloop transitions, 57 changer transitions 0/890 dead transitions. [2024-06-27 23:28:40,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 890 transitions, 16052 flow [2024-06-27 23:28:40,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:28:40,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:28:40,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-27 23:28:40,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-27 23:28:40,128 INFO L175 Difference]: Start difference. First operand has 446 places, 855 transitions, 13867 flow. Second operand 10 states and 186 transitions. [2024-06-27 23:28:40,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 890 transitions, 16052 flow