./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe028_power.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/safe028_power.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/safe028_power.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe028_power.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 [2024-06-28 00:36:32,846 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 00:36:32,907 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 00:36:32,911 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 00:36:32,912 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 00:36:32,929 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 00:36:32,932 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 00:36:32,932 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 00:36:32,933 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 00:36:32,936 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 00:36:32,936 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 00:36:32,936 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 00:36:32,937 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 00:36:32,938 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 00:36:32,938 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 00:36:32,938 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 00:36:32,939 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 00:36:32,939 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 00:36:32,939 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 00:36:32,939 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 00:36:32,939 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 00:36:32,940 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 00:36:32,940 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 00:36:32,940 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 00:36:32,940 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 00:36:32,940 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 00:36:32,941 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 00:36:32,941 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 00:36:32,941 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 00:36:32,941 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 00:36:32,942 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 00:36:32,942 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 00:36:32,943 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:36:32,943 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 00:36:32,943 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 00:36:32,943 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 00:36:32,943 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 00:36:32,943 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 00:36:32,944 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 00:36:32,944 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 00:36:32,944 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 00:36:32,944 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 00:36:32,944 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 00:36:32,944 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 00:36:33,112 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 00:36:33,125 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 00:36:33,127 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 00:36:33,128 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 00:36:33,128 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 00:36:33,129 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe028_power.i [2024-06-28 00:36:34,107 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 00:36:34,303 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 00:36:34,303 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe028_power.i [2024-06-28 00:36:34,326 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdbaec293/15b985317cce44ec8f18b9c735283b51/FLAG916f16cc5 [2024-06-28 00:36:34,678 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdbaec293/15b985317cce44ec8f18b9c735283b51 [2024-06-28 00:36:34,680 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 00:36:34,680 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 00:36:34,681 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe028_power.yml/witness.yml [2024-06-28 00:36:34,784 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 00:36:34,785 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 00:36:34,787 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 00:36:34,788 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 00:36:34,791 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 00:36:34,792 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:36:34" (1/2) ... [2024-06-28 00:36:34,793 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52784ffb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:36:34, skipping insertion in model container [2024-06-28 00:36:34,793 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:36:34" (1/2) ... [2024-06-28 00:36:34,794 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3700605e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:36:34, skipping insertion in model container [2024-06-28 00:36:34,795 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:36:34" (2/2) ... [2024-06-28 00:36:34,796 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52784ffb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:36:34, skipping insertion in model container [2024-06-28 00:36:34,796 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:36:34" (2/2) ... [2024-06-28 00:36:34,796 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 00:36:34,814 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 00:36:34,815 INFO L97 edCorrectnessWitness]: Location invariant before [L864-L864] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x$r_buff0_thd2 >= 0LL && (0LL - (long long )__unbuffered_p0_EAX) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (0LL - (long long )x) + (long long )x$r_buff0_thd2 >= 0LL) && (0LL - (long long )x) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$mem_tmp) + (long long )x$r_buff0_thd2 >= 0LL) && (0LL - (long long )x$mem_tmp) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff0_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$flush_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$mem_tmp) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$read_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff0_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff1_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$flush_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$mem_tmp) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff0_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff1_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice0 >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice2 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$r_buff1_thd2 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff0_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1 >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff1 - (long long )x$w_buff1_used >= 0LL) [2024-06-28 00:36:34,816 INFO L97 edCorrectnessWitness]: Location invariant before [L867-L867] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x$r_buff0_thd2 >= 0LL && (0LL - (long long )__unbuffered_p0_EAX) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (0LL - (long long )x) + (long long )x$r_buff0_thd2 >= 0LL) && (0LL - (long long )x) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$mem_tmp) + (long long )x$r_buff0_thd2 >= 0LL) && (0LL - (long long )x$mem_tmp) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff0_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$flush_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$mem_tmp) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$read_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff0_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff1_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$flush_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$mem_tmp) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff0_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff1_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice0 >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice2 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$r_buff1_thd2 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff0_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1 >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff1 - (long long )x$w_buff1_used >= 0LL) [2024-06-28 00:36:34,816 INFO L97 edCorrectnessWitness]: Location invariant before [L866-L866] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x$r_buff0_thd2 >= 0LL && (0LL - (long long )__unbuffered_p0_EAX) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (0LL - (long long )x) + (long long )x$r_buff0_thd2 >= 0LL) && (0LL - (long long )x) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$mem_tmp) + (long long )x$r_buff0_thd2 >= 0LL) && (0LL - (long long )x$mem_tmp) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff0_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$flush_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$mem_tmp) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$read_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff0_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff1_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$flush_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$mem_tmp) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff0_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff1_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice0 >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice2 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$r_buff1_thd2 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff0_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1 >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff1 - (long long )x$w_buff1_used >= 0LL) [2024-06-28 00:36:34,816 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 00:36:34,816 INFO L106 edCorrectnessWitness]: ghost_update [L862-L862] multithreaded = 1; [2024-06-28 00:36:34,855 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 00:36:35,200 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:36:35,210 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 00:36:35,353 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:36:35,394 INFO L206 MainTranslator]: Completed translation [2024-06-28 00:36:35,395 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:36:35 WrapperNode [2024-06-28 00:36:35,395 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 00:36:35,396 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 00:36:35,396 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 00:36:35,396 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 00:36:35,401 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 28.06 12:36:35" (1/1) ... [2024-06-28 00:36:35,426 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 28.06 12:36:35" (1/1) ... [2024-06-28 00:36:35,460 INFO L138 Inliner]: procedures = 175, calls = 75, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 206 [2024-06-28 00:36:35,461 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 00:36:35,461 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 00:36:35,462 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 00:36:35,462 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 00:36:35,470 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:36:35" (1/1) ... [2024-06-28 00:36:35,470 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:36:35" (1/1) ... [2024-06-28 00:36:35,475 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:36:35" (1/1) ... [2024-06-28 00:36:35,494 INFO L175 MemorySlicer]: Split 33 memory accesses to 2 slices as follows [2, 31]. 94 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 7 writes are split as follows [0, 7]. [2024-06-28 00:36:35,495 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:36:35" (1/1) ... [2024-06-28 00:36:35,495 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:36:35" (1/1) ... [2024-06-28 00:36:35,506 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:36:35" (1/1) ... [2024-06-28 00:36:35,508 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:36:35" (1/1) ... [2024-06-28 00:36:35,511 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:36:35" (1/1) ... [2024-06-28 00:36:35,514 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:36:35" (1/1) ... [2024-06-28 00:36:35,518 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 00:36:35,521 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 00:36:35,521 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 00:36:35,521 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 00:36:35,522 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:36:35" (1/1) ... [2024-06-28 00:36:35,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:36:35,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:36:35,547 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) [2024-06-28 00:36:35,564 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 [2024-06-28 00:36:35,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 00:36:35,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 00:36:35,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 00:36:35,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 00:36:35,582 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 00:36:35,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 00:36:35,582 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 00:36:35,582 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 00:36:35,582 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 00:36:35,583 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 00:36:35,583 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 00:36:35,583 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 00:36:35,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 00:36:35,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 00:36:35,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 00:36:35,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 00:36:35,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 00:36:35,587 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 00:36:35,753 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 00:36:35,754 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 00:36:36,294 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 00:36:36,294 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 00:36:36,649 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 00:36:36,649 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 00:36:36,649 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:36:36 BoogieIcfgContainer [2024-06-28 00:36:36,649 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 00:36:36,652 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 00:36:36,652 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 00:36:36,655 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 00:36:36,656 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 12:36:34" (1/4) ... [2024-06-28 00:36:36,657 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@161fe923 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 12:36:36, skipping insertion in model container [2024-06-28 00:36:36,657 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:36:34" (2/4) ... [2024-06-28 00:36:36,657 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@161fe923 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:36:36, skipping insertion in model container [2024-06-28 00:36:36,657 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:36:35" (3/4) ... [2024-06-28 00:36:36,658 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@161fe923 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:36:36, skipping insertion in model container [2024-06-28 00:36:36,659 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:36:36" (4/4) ... [2024-06-28 00:36:36,660 INFO L112 eAbstractionObserver]: Analyzing ICFG safe028_power.i [2024-06-28 00:36:36,678 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 00:36:36,678 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 00:36:36,678 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 00:36:36,749 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 00:36:36,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-28 00:36:36,818 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-28 00:36:36,818 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:36:36,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 55 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 00:36:36,820 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-28 00:36:36,823 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-28 00:36:36,878 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 00:36:36,887 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;@320241b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 00:36:36,887 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 00:36:36,908 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 00:36:36,908 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-28 00:36:36,908 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:36:36,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:36,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 00:36:36,910 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)] === [2024-06-28 00:36:36,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:36,914 INFO L85 PathProgramCache]: Analyzing trace with hash 801103074, now seen corresponding path program 1 times [2024-06-28 00:36:36,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:36,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141756415] [2024-06-28 00:36:36,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:36,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:37,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:38,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:38,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:38,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141756415] [2024-06-28 00:36:38,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141756415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:38,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:38,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 00:36:38,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274430146] [2024-06-28 00:36:38,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:38,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 00:36:38,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:38,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 00:36:38,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 00:36:38,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:36:38,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:38,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:38,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:36:38,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:39,408 INFO L124 PetriNetUnfolderBase]: 990/1587 cut-off events. [2024-06-28 00:36:39,408 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-28 00:36:39,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3167 conditions, 1587 events. 990/1587 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7658 event pairs, 650 based on Foata normal form. 1/1557 useless extension candidates. Maximal degree in co-relation 3155. Up to 1503 conditions per place. [2024-06-28 00:36:39,419 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 34 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-28 00:36:39,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 181 flow [2024-06-28 00:36:39,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 00:36:39,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 00:36:39,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-28 00:36:39,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-28 00:36:39,428 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 71 transitions. [2024-06-28 00:36:39,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 181 flow [2024-06-28 00:36:39,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 00:36:39,432 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-28 00:36:39,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-28 00:36:39,436 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-28 00:36:39,436 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-28 00:36:39,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:39,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:39,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:36:39,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 00:36:39,436 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:36:39,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:39,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1061039931, now seen corresponding path program 1 times [2024-06-28 00:36:39,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:39,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975262098] [2024-06-28 00:36:39,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:39,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:39,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:40,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:40,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:40,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975262098] [2024-06-28 00:36:40,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975262098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:40,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:40,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 00:36:40,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534408164] [2024-06-28 00:36:40,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:40,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:36:40,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:40,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:36:40,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:36:40,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 00:36:40,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:40,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:40,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 00:36:40,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:41,299 INFO L124 PetriNetUnfolderBase]: 1154/1773 cut-off events. [2024-06-28 00:36:41,299 INFO L125 PetriNetUnfolderBase]: For 341/341 co-relation queries the response was YES. [2024-06-28 00:36:41,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4082 conditions, 1773 events. 1154/1773 cut-off events. For 341/341 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8315 event pairs, 649 based on Foata normal form. 3/1774 useless extension candidates. Maximal degree in co-relation 4070. Up to 1720 conditions per place. [2024-06-28 00:36:41,311 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 44 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-06-28 00:36:41,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 258 flow [2024-06-28 00:36:41,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:36:41,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:36:41,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2024-06-28 00:36:41,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-28 00:36:41,315 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 90 transitions. [2024-06-28 00:36:41,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 258 flow [2024-06-28 00:36:41,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 254 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 00:36:41,318 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-28 00:36:41,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-28 00:36:41,321 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-28 00:36:41,321 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-28 00:36:41,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:41,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:41,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:36:41,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 00:36:41,327 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)] === [2024-06-28 00:36:41,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:41,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1752171834, now seen corresponding path program 1 times [2024-06-28 00:36:41,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:41,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840623974] [2024-06-28 00:36:41,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:41,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:41,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:43,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:43,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:43,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840623974] [2024-06-28 00:36:43,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840623974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:43,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:43,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:36:43,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815196793] [2024-06-28 00:36:43,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:43,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:36:43,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:43,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:36:43,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:36:43,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 00:36:43,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:43,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:43,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 00:36:43,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:44,282 INFO L124 PetriNetUnfolderBase]: 1147/1764 cut-off events. [2024-06-28 00:36:44,282 INFO L125 PetriNetUnfolderBase]: For 991/991 co-relation queries the response was YES. [2024-06-28 00:36:44,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4536 conditions, 1764 events. 1147/1764 cut-off events. For 991/991 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8244 event pairs, 519 based on Foata normal form. 4/1766 useless extension candidates. Maximal degree in co-relation 4522. Up to 1674 conditions per place. [2024-06-28 00:36:44,292 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 58 selfloop transitions, 14 changer transitions 0/78 dead transitions. [2024-06-28 00:36:44,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 78 transitions, 400 flow [2024-06-28 00:36:44,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:36:44,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:36:44,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-28 00:36:44,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5523809523809524 [2024-06-28 00:36:44,294 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 116 transitions. [2024-06-28 00:36:44,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 78 transitions, 400 flow [2024-06-28 00:36:44,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 78 transitions, 386 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-28 00:36:44,296 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 220 flow [2024-06-28 00:36:44,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=220, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2024-06-28 00:36:44,297 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-28 00:36:44,297 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 220 flow [2024-06-28 00:36:44,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:44,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:44,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:36:44,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 00:36:44,298 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)] === [2024-06-28 00:36:44,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:44,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1939049055, now seen corresponding path program 1 times [2024-06-28 00:36:44,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:44,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578217429] [2024-06-28 00:36:44,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:44,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:44,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:46,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:46,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:46,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578217429] [2024-06-28 00:36:46,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578217429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:46,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:46,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:36:46,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210994053] [2024-06-28 00:36:46,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:46,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:36:46,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:46,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:36:46,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:36:46,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 00:36:46,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 220 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:46,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:46,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 00:36:46,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:47,327 INFO L124 PetriNetUnfolderBase]: 1136/1747 cut-off events. [2024-06-28 00:36:47,327 INFO L125 PetriNetUnfolderBase]: For 2202/2202 co-relation queries the response was YES. [2024-06-28 00:36:47,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5211 conditions, 1747 events. 1136/1747 cut-off events. For 2202/2202 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8133 event pairs, 371 based on Foata normal form. 8/1753 useless extension candidates. Maximal degree in co-relation 5194. Up to 1607 conditions per place. [2024-06-28 00:36:47,336 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 64 selfloop transitions, 16 changer transitions 0/86 dead transitions. [2024-06-28 00:36:47,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 86 transitions, 492 flow [2024-06-28 00:36:47,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:36:47,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:36:47,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-28 00:36:47,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-28 00:36:47,340 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 220 flow. Second operand 6 states and 133 transitions. [2024-06-28 00:36:47,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 86 transitions, 492 flow [2024-06-28 00:36:47,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 86 transitions, 492 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-28 00:36:47,346 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 267 flow [2024-06-28 00:36:47,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=267, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-06-28 00:36:47,347 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-28 00:36:47,348 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 267 flow [2024-06-28 00:36:47,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:47,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:47,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:36:47,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 00:36:47,348 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)] === [2024-06-28 00:36:47,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:47,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1986981048, now seen corresponding path program 1 times [2024-06-28 00:36:47,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:47,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552126004] [2024-06-28 00:36:47,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:47,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:47,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:49,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:49,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:49,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552126004] [2024-06-28 00:36:49,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552126004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:49,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:49,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:36:49,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787963820] [2024-06-28 00:36:49,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:49,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:36:49,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:49,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:36:49,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:36:49,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 00:36:49,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 267 flow. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:49,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:49,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 00:36:49,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:49,689 INFO L124 PetriNetUnfolderBase]: 1061/1678 cut-off events. [2024-06-28 00:36:49,690 INFO L125 PetriNetUnfolderBase]: For 3514/3535 co-relation queries the response was YES. [2024-06-28 00:36:49,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5403 conditions, 1678 events. 1061/1678 cut-off events. For 3514/3535 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8368 event pairs, 599 based on Foata normal form. 4/1653 useless extension candidates. Maximal degree in co-relation 5382. Up to 1571 conditions per place. [2024-06-28 00:36:49,702 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 47 selfloop transitions, 10 changer transitions 0/67 dead transitions. [2024-06-28 00:36:49,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 67 transitions, 441 flow [2024-06-28 00:36:49,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:36:49,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:36:49,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-28 00:36:49,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-28 00:36:49,707 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 267 flow. Second operand 6 states and 103 transitions. [2024-06-28 00:36:49,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 67 transitions, 441 flow [2024-06-28 00:36:49,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 67 transitions, 406 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-28 00:36:49,711 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 299 flow [2024-06-28 00:36:49,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=299, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-06-28 00:36:49,713 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-28 00:36:49,713 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 299 flow [2024-06-28 00:36:49,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:49,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:49,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:36:49,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 00:36:49,714 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)] === [2024-06-28 00:36:49,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:49,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1489215468, now seen corresponding path program 1 times [2024-06-28 00:36:49,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:49,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449593056] [2024-06-28 00:36:49,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:49,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:49,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:52,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:52,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:52,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449593056] [2024-06-28 00:36:52,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449593056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:52,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:52,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:36:52,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173312321] [2024-06-28 00:36:52,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:52,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:36:52,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:52,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:36:52,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:36:52,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 00:36:52,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 299 flow. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:52,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:52,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 00:36:52,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:53,004 INFO L124 PetriNetUnfolderBase]: 1095/1725 cut-off events. [2024-06-28 00:36:53,005 INFO L125 PetriNetUnfolderBase]: For 4569/4590 co-relation queries the response was YES. [2024-06-28 00:36:53,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5921 conditions, 1725 events. 1095/1725 cut-off events. For 4569/4590 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8627 event pairs, 582 based on Foata normal form. 9/1702 useless extension candidates. Maximal degree in co-relation 5897. Up to 1580 conditions per place. [2024-06-28 00:36:53,016 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 53 selfloop transitions, 21 changer transitions 0/84 dead transitions. [2024-06-28 00:36:53,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 84 transitions, 559 flow [2024-06-28 00:36:53,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:36:53,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:36:53,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-28 00:36:53,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-28 00:36:53,017 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 299 flow. Second operand 6 states and 117 transitions. [2024-06-28 00:36:53,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 84 transitions, 559 flow [2024-06-28 00:36:53,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 84 transitions, 537 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 00:36:53,022 INFO L231 Difference]: Finished difference. Result has 64 places, 64 transitions, 420 flow [2024-06-28 00:36:53,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=420, PETRI_PLACES=64, PETRI_TRANSITIONS=64} [2024-06-28 00:36:53,024 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-28 00:36:53,024 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 64 transitions, 420 flow [2024-06-28 00:36:53,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:53,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:53,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:36:53,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 00:36:53,024 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)] === [2024-06-28 00:36:53,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:53,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1837255117, now seen corresponding path program 1 times [2024-06-28 00:36:53,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:53,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437008464] [2024-06-28 00:36:53,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:53,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:53,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:54,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:54,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:54,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437008464] [2024-06-28 00:36:54,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437008464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:54,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:54,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:36:54,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232043502] [2024-06-28 00:36:54,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:54,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:36:54,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:54,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:36:54,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:36:54,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:36:54,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 64 transitions, 420 flow. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:54,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:54,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:36:54,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:55,415 INFO L124 PetriNetUnfolderBase]: 1189/1827 cut-off events. [2024-06-28 00:36:55,416 INFO L125 PetriNetUnfolderBase]: For 6235/6235 co-relation queries the response was YES. [2024-06-28 00:36:55,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7353 conditions, 1827 events. 1189/1827 cut-off events. For 6235/6235 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8455 event pairs, 432 based on Foata normal form. 2/1827 useless extension candidates. Maximal degree in co-relation 7325. Up to 1753 conditions per place. [2024-06-28 00:36:55,426 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 77 selfloop transitions, 17 changer transitions 0/99 dead transitions. [2024-06-28 00:36:55,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 99 transitions, 723 flow [2024-06-28 00:36:55,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:36:55,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:36:55,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-28 00:36:55,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-28 00:36:55,428 INFO L175 Difference]: Start difference. First operand has 64 places, 64 transitions, 420 flow. Second operand 7 states and 127 transitions. [2024-06-28 00:36:55,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 99 transitions, 723 flow [2024-06-28 00:36:55,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 99 transitions, 702 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-28 00:36:55,433 INFO L231 Difference]: Finished difference. Result has 71 places, 72 transitions, 505 flow [2024-06-28 00:36:55,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=505, PETRI_PLACES=71, PETRI_TRANSITIONS=72} [2024-06-28 00:36:55,433 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2024-06-28 00:36:55,433 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 72 transitions, 505 flow [2024-06-28 00:36:55,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:55,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:55,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:36:55,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 00:36:55,434 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)] === [2024-06-28 00:36:55,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:55,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1079204921, now seen corresponding path program 2 times [2024-06-28 00:36:55,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:55,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704093795] [2024-06-28 00:36:55,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:55,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:55,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:57,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:57,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:57,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704093795] [2024-06-28 00:36:57,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704093795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:57,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:57,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:36:57,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022389724] [2024-06-28 00:36:57,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:57,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:36:57,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:57,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:36:57,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:36:57,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:36:57,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 72 transitions, 505 flow. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:57,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:57,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:36:57,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:58,274 INFO L124 PetriNetUnfolderBase]: 1220/1878 cut-off events. [2024-06-28 00:36:58,274 INFO L125 PetriNetUnfolderBase]: For 7845/7845 co-relation queries the response was YES. [2024-06-28 00:36:58,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7998 conditions, 1878 events. 1220/1878 cut-off events. For 7845/7845 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8723 event pairs, 433 based on Foata normal form. 2/1875 useless extension candidates. Maximal degree in co-relation 7966. Up to 1788 conditions per place. [2024-06-28 00:36:58,287 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 73 selfloop transitions, 23 changer transitions 0/101 dead transitions. [2024-06-28 00:36:58,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 101 transitions, 845 flow [2024-06-28 00:36:58,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:36:58,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:36:58,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-28 00:36:58,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-28 00:36:58,289 INFO L175 Difference]: Start difference. First operand has 71 places, 72 transitions, 505 flow. Second operand 7 states and 118 transitions. [2024-06-28 00:36:58,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 101 transitions, 845 flow [2024-06-28 00:36:58,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 101 transitions, 775 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-28 00:36:58,298 INFO L231 Difference]: Finished difference. Result has 74 places, 82 transitions, 601 flow [2024-06-28 00:36:58,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=601, PETRI_PLACES=74, PETRI_TRANSITIONS=82} [2024-06-28 00:36:58,299 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2024-06-28 00:36:58,299 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 82 transitions, 601 flow [2024-06-28 00:36:58,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:58,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:58,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:36:58,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 00:36:58,300 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)] === [2024-06-28 00:36:58,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:58,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1078967771, now seen corresponding path program 3 times [2024-06-28 00:36:58,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:58,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564722843] [2024-06-28 00:36:58,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:58,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:58,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:00,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:00,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:00,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564722843] [2024-06-28 00:37:00,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564722843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:00,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:00,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:37:00,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987581424] [2024-06-28 00:37:00,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:00,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:37:00,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:00,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:37:00,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:37:00,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:37:00,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 82 transitions, 601 flow. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:00,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:00,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:37:00,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:00,847 INFO L124 PetriNetUnfolderBase]: 1215/1867 cut-off events. [2024-06-28 00:37:00,847 INFO L125 PetriNetUnfolderBase]: For 9733/9733 co-relation queries the response was YES. [2024-06-28 00:37:00,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8362 conditions, 1867 events. 1215/1867 cut-off events. For 9733/9733 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8614 event pairs, 439 based on Foata normal form. 2/1861 useless extension candidates. Maximal degree in co-relation 8329. Up to 1748 conditions per place. [2024-06-28 00:37:00,859 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 67 selfloop transitions, 31 changer transitions 0/103 dead transitions. [2024-06-28 00:37:00,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 103 transitions, 881 flow [2024-06-28 00:37:00,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:37:00,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:37:00,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-28 00:37:00,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-28 00:37:00,860 INFO L175 Difference]: Start difference. First operand has 74 places, 82 transitions, 601 flow. Second operand 6 states and 109 transitions. [2024-06-28 00:37:00,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 103 transitions, 881 flow [2024-06-28 00:37:00,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 103 transitions, 846 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-28 00:37:00,866 INFO L231 Difference]: Finished difference. Result has 78 places, 85 transitions, 676 flow [2024-06-28 00:37:00,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=566, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=676, PETRI_PLACES=78, PETRI_TRANSITIONS=85} [2024-06-28 00:37:00,867 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 35 predicate places. [2024-06-28 00:37:00,867 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 85 transitions, 676 flow [2024-06-28 00:37:00,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:00,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:00,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:00,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 00:37:00,868 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)] === [2024-06-28 00:37:00,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:00,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1771599593, now seen corresponding path program 1 times [2024-06-28 00:37:00,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:00,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057954538] [2024-06-28 00:37:00,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:00,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:00,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:03,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:03,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:03,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057954538] [2024-06-28 00:37:03,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057954538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:03,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:03,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:37:03,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877419537] [2024-06-28 00:37:03,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:03,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:37:03,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:03,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:37:03,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:37:03,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:37:03,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 85 transitions, 676 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:03,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:03,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:37:03,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:04,765 INFO L124 PetriNetUnfolderBase]: 1288/1991 cut-off events. [2024-06-28 00:37:04,765 INFO L125 PetriNetUnfolderBase]: For 14156/14156 co-relation queries the response was YES. [2024-06-28 00:37:04,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9186 conditions, 1991 events. 1288/1991 cut-off events. For 14156/14156 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 9601 event pairs, 622 based on Foata normal form. 16/2004 useless extension candidates. Maximal degree in co-relation 9151. Up to 1803 conditions per place. [2024-06-28 00:37:04,781 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 95 selfloop transitions, 26 changer transitions 0/126 dead transitions. [2024-06-28 00:37:04,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 126 transitions, 1105 flow [2024-06-28 00:37:04,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:37:04,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:37:04,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-28 00:37:04,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-28 00:37:04,784 INFO L175 Difference]: Start difference. First operand has 78 places, 85 transitions, 676 flow. Second operand 7 states and 135 transitions. [2024-06-28 00:37:04,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 126 transitions, 1105 flow [2024-06-28 00:37:04,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 126 transitions, 1019 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-28 00:37:04,797 INFO L231 Difference]: Finished difference. Result has 83 places, 96 transitions, 763 flow [2024-06-28 00:37:04,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=763, PETRI_PLACES=83, PETRI_TRANSITIONS=96} [2024-06-28 00:37:04,798 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 40 predicate places. [2024-06-28 00:37:04,798 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 96 transitions, 763 flow [2024-06-28 00:37:04,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:04,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:04,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:04,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 00:37:04,799 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)] === [2024-06-28 00:37:04,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:04,800 INFO L85 PathProgramCache]: Analyzing trace with hash -613985639, now seen corresponding path program 1 times [2024-06-28 00:37:04,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:04,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788290288] [2024-06-28 00:37:04,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:04,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:04,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:07,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:07,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:07,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788290288] [2024-06-28 00:37:07,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788290288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:07,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:07,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:37:07,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483019279] [2024-06-28 00:37:07,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:07,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:37:07,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:07,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:37:07,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:37:07,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:37:07,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 96 transitions, 763 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:07,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:07,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:37:07,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:07,995 INFO L124 PetriNetUnfolderBase]: 1301/2005 cut-off events. [2024-06-28 00:37:07,996 INFO L125 PetriNetUnfolderBase]: For 14278/14278 co-relation queries the response was YES. [2024-06-28 00:37:08,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9747 conditions, 2005 events. 1301/2005 cut-off events. For 14278/14278 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 9381 event pairs, 422 based on Foata normal form. 2/2005 useless extension candidates. Maximal degree in co-relation 9709. Up to 1899 conditions per place. [2024-06-28 00:37:08,009 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 99 selfloop transitions, 27 changer transitions 0/131 dead transitions. [2024-06-28 00:37:08,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 131 transitions, 1137 flow [2024-06-28 00:37:08,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:37:08,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:37:08,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-28 00:37:08,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-28 00:37:08,012 INFO L175 Difference]: Start difference. First operand has 83 places, 96 transitions, 763 flow. Second operand 8 states and 143 transitions. [2024-06-28 00:37:08,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 131 transitions, 1137 flow [2024-06-28 00:37:08,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 131 transitions, 1094 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-28 00:37:08,022 INFO L231 Difference]: Finished difference. Result has 89 places, 99 transitions, 823 flow [2024-06-28 00:37:08,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=823, PETRI_PLACES=89, PETRI_TRANSITIONS=99} [2024-06-28 00:37:08,023 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-28 00:37:08,023 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 99 transitions, 823 flow [2024-06-28 00:37:08,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:08,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:08,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:08,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 00:37:08,024 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)] === [2024-06-28 00:37:08,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:08,024 INFO L85 PathProgramCache]: Analyzing trace with hash 613716123, now seen corresponding path program 2 times [2024-06-28 00:37:08,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:08,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165316694] [2024-06-28 00:37:08,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:08,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:08,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:10,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:10,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:10,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165316694] [2024-06-28 00:37:10,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165316694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:10,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:10,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:37:10,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778942596] [2024-06-28 00:37:10,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:10,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:37:10,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:10,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:37:10,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:37:10,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:37:10,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 99 transitions, 823 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:10,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:10,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:37:10,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:11,596 INFO L124 PetriNetUnfolderBase]: 1323/2036 cut-off events. [2024-06-28 00:37:11,596 INFO L125 PetriNetUnfolderBase]: For 16463/16463 co-relation queries the response was YES. [2024-06-28 00:37:11,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10278 conditions, 2036 events. 1323/2036 cut-off events. For 16463/16463 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 9479 event pairs, 423 based on Foata normal form. 2/2033 useless extension candidates. Maximal degree in co-relation 10238. Up to 1928 conditions per place. [2024-06-28 00:37:11,610 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 95 selfloop transitions, 29 changer transitions 0/129 dead transitions. [2024-06-28 00:37:11,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 129 transitions, 1220 flow [2024-06-28 00:37:11,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:37:11,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:37:11,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-28 00:37:11,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-28 00:37:11,612 INFO L175 Difference]: Start difference. First operand has 89 places, 99 transitions, 823 flow. Second operand 8 states and 134 transitions. [2024-06-28 00:37:11,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 129 transitions, 1220 flow [2024-06-28 00:37:11,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 129 transitions, 1112 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-28 00:37:11,623 INFO L231 Difference]: Finished difference. Result has 91 places, 105 transitions, 880 flow [2024-06-28 00:37:11,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=880, PETRI_PLACES=91, PETRI_TRANSITIONS=105} [2024-06-28 00:37:11,624 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 48 predicate places. [2024-06-28 00:37:11,624 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 105 transitions, 880 flow [2024-06-28 00:37:11,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:11,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:11,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:11,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 00:37:11,625 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)] === [2024-06-28 00:37:11,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:11,625 INFO L85 PathProgramCache]: Analyzing trace with hash 914712571, now seen corresponding path program 3 times [2024-06-28 00:37:11,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:11,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764197817] [2024-06-28 00:37:11,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:11,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:11,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:14,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:14,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:14,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764197817] [2024-06-28 00:37:14,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764197817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:14,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:14,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:37:14,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208792582] [2024-06-28 00:37:14,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:14,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:37:14,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:14,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:37:14,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:37:14,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:37:14,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 105 transitions, 880 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:14,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:14,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:37:14,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:15,053 INFO L124 PetriNetUnfolderBase]: 1336/2057 cut-off events. [2024-06-28 00:37:15,054 INFO L125 PetriNetUnfolderBase]: For 19375/19375 co-relation queries the response was YES. [2024-06-28 00:37:15,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10768 conditions, 2057 events. 1336/2057 cut-off events. For 19375/19375 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 9605 event pairs, 429 based on Foata normal form. 2/2051 useless extension candidates. Maximal degree in co-relation 10727. Up to 1921 conditions per place. [2024-06-28 00:37:15,067 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 92 selfloop transitions, 34 changer transitions 0/131 dead transitions. [2024-06-28 00:37:15,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 131 transitions, 1242 flow [2024-06-28 00:37:15,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:37:15,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:37:15,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-28 00:37:15,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-28 00:37:15,069 INFO L175 Difference]: Start difference. First operand has 91 places, 105 transitions, 880 flow. Second operand 7 states and 125 transitions. [2024-06-28 00:37:15,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 131 transitions, 1242 flow [2024-06-28 00:37:15,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 131 transitions, 1164 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-28 00:37:15,081 INFO L231 Difference]: Finished difference. Result has 92 places, 108 transitions, 930 flow [2024-06-28 00:37:15,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=930, PETRI_PLACES=92, PETRI_TRANSITIONS=108} [2024-06-28 00:37:15,082 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-28 00:37:15,082 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 108 transitions, 930 flow [2024-06-28 00:37:15,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:15,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:15,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:15,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 00:37:15,083 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)] === [2024-06-28 00:37:15,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:15,083 INFO L85 PathProgramCache]: Analyzing trace with hash 914979481, now seen corresponding path program 4 times [2024-06-28 00:37:15,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:15,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877389733] [2024-06-28 00:37:15,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:15,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:15,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:17,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:17,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:17,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877389733] [2024-06-28 00:37:17,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877389733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:17,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:17,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:37:17,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457555263] [2024-06-28 00:37:17,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:17,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:37:17,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:17,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:37:17,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:37:17,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:37:17,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 108 transitions, 930 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:17,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:17,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:37:17,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:18,855 INFO L124 PetriNetUnfolderBase]: 1406/2167 cut-off events. [2024-06-28 00:37:18,855 INFO L125 PetriNetUnfolderBase]: For 23930/23930 co-relation queries the response was YES. [2024-06-28 00:37:18,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11783 conditions, 2167 events. 1406/2167 cut-off events. For 23930/23930 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10409 event pairs, 361 based on Foata normal form. 3/2160 useless extension candidates. Maximal degree in co-relation 11741. Up to 1854 conditions per place. [2024-06-28 00:37:18,867 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 89 selfloop transitions, 63 changer transitions 0/157 dead transitions. [2024-06-28 00:37:18,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 157 transitions, 1710 flow [2024-06-28 00:37:18,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:37:18,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:37:18,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-28 00:37:18,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-28 00:37:18,870 INFO L175 Difference]: Start difference. First operand has 92 places, 108 transitions, 930 flow. Second operand 8 states and 147 transitions. [2024-06-28 00:37:18,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 157 transitions, 1710 flow [2024-06-28 00:37:18,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 157 transitions, 1606 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-28 00:37:18,882 INFO L231 Difference]: Finished difference. Result has 98 places, 128 transitions, 1300 flow [2024-06-28 00:37:18,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1300, PETRI_PLACES=98, PETRI_TRANSITIONS=128} [2024-06-28 00:37:18,883 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-28 00:37:18,883 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 128 transitions, 1300 flow [2024-06-28 00:37:18,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:18,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:18,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:18,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 00:37:18,884 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)] === [2024-06-28 00:37:18,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:18,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1273214238, now seen corresponding path program 1 times [2024-06-28 00:37:18,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:18,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567695173] [2024-06-28 00:37:18,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:18,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:18,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:21,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:21,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:21,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567695173] [2024-06-28 00:37:21,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567695173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:21,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:21,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:37:21,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002812976] [2024-06-28 00:37:21,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:21,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:37:21,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:21,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:37:21,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:37:21,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:37:21,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 128 transitions, 1300 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:21,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:21,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:37:21,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:22,171 INFO L124 PetriNetUnfolderBase]: 1476/2290 cut-off events. [2024-06-28 00:37:22,172 INFO L125 PetriNetUnfolderBase]: For 28584/28584 co-relation queries the response was YES. [2024-06-28 00:37:22,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13451 conditions, 2290 events. 1476/2290 cut-off events. For 28584/28584 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 11177 event pairs, 354 based on Foata normal form. 3/2291 useless extension candidates. Maximal degree in co-relation 13405. Up to 2093 conditions per place. [2024-06-28 00:37:22,187 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 140 selfloop transitions, 36 changer transitions 0/181 dead transitions. [2024-06-28 00:37:22,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 181 transitions, 2042 flow [2024-06-28 00:37:22,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:37:22,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:37:22,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-28 00:37:22,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-28 00:37:22,189 INFO L175 Difference]: Start difference. First operand has 98 places, 128 transitions, 1300 flow. Second operand 8 states and 155 transitions. [2024-06-28 00:37:22,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 181 transitions, 2042 flow [2024-06-28 00:37:22,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 181 transitions, 1958 flow, removed 33 selfloop flow, removed 2 redundant places. [2024-06-28 00:37:22,215 INFO L231 Difference]: Finished difference. Result has 106 places, 142 transitions, 1485 flow [2024-06-28 00:37:22,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1221, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1485, PETRI_PLACES=106, PETRI_TRANSITIONS=142} [2024-06-28 00:37:22,216 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2024-06-28 00:37:22,216 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 142 transitions, 1485 flow [2024-06-28 00:37:22,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:22,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:22,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:22,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 00:37:22,216 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)] === [2024-06-28 00:37:22,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:22,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1859179184, now seen corresponding path program 2 times [2024-06-28 00:37:22,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:22,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432551595] [2024-06-28 00:37:22,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:22,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:22,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:24,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:24,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:24,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432551595] [2024-06-28 00:37:24,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432551595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:24,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:24,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:37:24,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640934572] [2024-06-28 00:37:24,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:24,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:37:24,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:24,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:37:24,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:37:24,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:37:24,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 142 transitions, 1485 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:24,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:24,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:37:24,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:25,729 INFO L124 PetriNetUnfolderBase]: 1530/2371 cut-off events. [2024-06-28 00:37:25,729 INFO L125 PetriNetUnfolderBase]: For 31553/31553 co-relation queries the response was YES. [2024-06-28 00:37:25,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14249 conditions, 2371 events. 1530/2371 cut-off events. For 31553/31553 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11639 event pairs, 362 based on Foata normal form. 3/2371 useless extension candidates. Maximal degree in co-relation 14199. Up to 2111 conditions per place. [2024-06-28 00:37:25,745 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 136 selfloop transitions, 48 changer transitions 0/189 dead transitions. [2024-06-28 00:37:25,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 189 transitions, 2285 flow [2024-06-28 00:37:25,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:37:25,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:37:25,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-28 00:37:25,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-28 00:37:25,748 INFO L175 Difference]: Start difference. First operand has 106 places, 142 transitions, 1485 flow. Second operand 8 states and 156 transitions. [2024-06-28 00:37:25,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 189 transitions, 2285 flow [2024-06-28 00:37:25,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 189 transitions, 2209 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-28 00:37:25,775 INFO L231 Difference]: Finished difference. Result has 111 places, 151 transitions, 1696 flow [2024-06-28 00:37:25,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1409, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1696, PETRI_PLACES=111, PETRI_TRANSITIONS=151} [2024-06-28 00:37:25,775 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 68 predicate places. [2024-06-28 00:37:25,775 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 151 transitions, 1696 flow [2024-06-28 00:37:25,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:25,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:25,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:25,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 00:37:25,776 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)] === [2024-06-28 00:37:25,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:25,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1819250050, now seen corresponding path program 3 times [2024-06-28 00:37:25,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:25,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878522812] [2024-06-28 00:37:25,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:25,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:25,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:27,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:27,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:27,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878522812] [2024-06-28 00:37:27,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878522812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:27,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:27,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:37:27,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832839501] [2024-06-28 00:37:27,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:27,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:37:27,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:27,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:37:27,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:37:27,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:37:27,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 151 transitions, 1696 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:27,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:27,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:37:27,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:28,489 INFO L124 PetriNetUnfolderBase]: 1550/2406 cut-off events. [2024-06-28 00:37:28,489 INFO L125 PetriNetUnfolderBase]: For 35922/35922 co-relation queries the response was YES. [2024-06-28 00:37:28,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15021 conditions, 2406 events. 1550/2406 cut-off events. For 35922/35922 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11847 event pairs, 355 based on Foata normal form. 3/2407 useless extension candidates. Maximal degree in co-relation 14970. Up to 2184 conditions per place. [2024-06-28 00:37:28,504 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 149 selfloop transitions, 45 changer transitions 0/199 dead transitions. [2024-06-28 00:37:28,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 199 transitions, 2408 flow [2024-06-28 00:37:28,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:37:28,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:37:28,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-28 00:37:28,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-28 00:37:28,506 INFO L175 Difference]: Start difference. First operand has 111 places, 151 transitions, 1696 flow. Second operand 8 states and 154 transitions. [2024-06-28 00:37:28,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 199 transitions, 2408 flow [2024-06-28 00:37:28,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 199 transitions, 2276 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-28 00:37:28,539 INFO L231 Difference]: Finished difference. Result has 115 places, 161 transitions, 1820 flow [2024-06-28 00:37:28,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1577, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1820, PETRI_PLACES=115, PETRI_TRANSITIONS=161} [2024-06-28 00:37:28,540 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 72 predicate places. [2024-06-28 00:37:28,540 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 161 transitions, 1820 flow [2024-06-28 00:37:28,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:28,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:28,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:28,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 00:37:28,540 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)] === [2024-06-28 00:37:28,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:28,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1086426512, now seen corresponding path program 1 times [2024-06-28 00:37:28,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:28,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127334423] [2024-06-28 00:37:28,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:28,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:28,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:31,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:31,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:31,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127334423] [2024-06-28 00:37:31,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127334423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:31,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:31,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:37:31,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245986195] [2024-06-28 00:37:31,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:31,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:37:31,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:31,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:37:31,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:37:31,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:37:31,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 161 transitions, 1820 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:31,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:31,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:37:31,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:32,173 INFO L124 PetriNetUnfolderBase]: 1570/2439 cut-off events. [2024-06-28 00:37:32,173 INFO L125 PetriNetUnfolderBase]: For 40609/40609 co-relation queries the response was YES. [2024-06-28 00:37:32,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15441 conditions, 2439 events. 1570/2439 cut-off events. For 40609/40609 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 12092 event pairs, 366 based on Foata normal form. 4/2441 useless extension candidates. Maximal degree in co-relation 15388. Up to 2261 conditions per place. [2024-06-28 00:37:32,190 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 164 selfloop transitions, 32 changer transitions 0/201 dead transitions. [2024-06-28 00:37:32,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 201 transitions, 2382 flow [2024-06-28 00:37:32,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:37:32,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:37:32,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-28 00:37:32,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-28 00:37:32,192 INFO L175 Difference]: Start difference. First operand has 115 places, 161 transitions, 1820 flow. Second operand 9 states and 159 transitions. [2024-06-28 00:37:32,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 201 transitions, 2382 flow [2024-06-28 00:37:32,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 201 transitions, 2266 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-28 00:37:32,219 INFO L231 Difference]: Finished difference. Result has 119 places, 163 transitions, 1826 flow [2024-06-28 00:37:32,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1704, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1826, PETRI_PLACES=119, PETRI_TRANSITIONS=163} [2024-06-28 00:37:32,220 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-28 00:37:32,220 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 163 transitions, 1826 flow [2024-06-28 00:37:32,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:32,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:32,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:32,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 00:37:32,220 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)] === [2024-06-28 00:37:32,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:32,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1840563990, now seen corresponding path program 4 times [2024-06-28 00:37:32,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:32,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144978481] [2024-06-28 00:37:32,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:32,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:32,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:34,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:34,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:34,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144978481] [2024-06-28 00:37:34,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144978481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:34,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:34,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:37:34,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974726958] [2024-06-28 00:37:34,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:34,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:37:34,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:34,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:37:34,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:37:34,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:37:34,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 163 transitions, 1826 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:34,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:34,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:37:34,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:36,011 INFO L124 PetriNetUnfolderBase]: 1632/2522 cut-off events. [2024-06-28 00:37:36,012 INFO L125 PetriNetUnfolderBase]: For 41661/41661 co-relation queries the response was YES. [2024-06-28 00:37:36,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16171 conditions, 2522 events. 1632/2522 cut-off events. For 41661/41661 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12355 event pairs, 386 based on Foata normal form. 3/2515 useless extension candidates. Maximal degree in co-relation 16117. Up to 2276 conditions per place. [2024-06-28 00:37:36,036 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 147 selfloop transitions, 88 changer transitions 0/240 dead transitions. [2024-06-28 00:37:36,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 240 transitions, 3054 flow [2024-06-28 00:37:36,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:37:36,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:37:36,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-28 00:37:36,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-28 00:37:36,038 INFO L175 Difference]: Start difference. First operand has 119 places, 163 transitions, 1826 flow. Second operand 10 states and 174 transitions. [2024-06-28 00:37:36,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 240 transitions, 3054 flow [2024-06-28 00:37:36,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 240 transitions, 2952 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-28 00:37:36,071 INFO L231 Difference]: Finished difference. Result has 124 places, 211 transitions, 2636 flow [2024-06-28 00:37:36,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1724, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2636, PETRI_PLACES=124, PETRI_TRANSITIONS=211} [2024-06-28 00:37:36,072 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 81 predicate places. [2024-06-28 00:37:36,072 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 211 transitions, 2636 flow [2024-06-28 00:37:36,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:36,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:36,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:36,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 00:37:36,072 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)] === [2024-06-28 00:37:36,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:36,073 INFO L85 PathProgramCache]: Analyzing trace with hash 474991542, now seen corresponding path program 5 times [2024-06-28 00:37:36,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:36,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873357317] [2024-06-28 00:37:36,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:36,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:36,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:38,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:38,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:38,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873357317] [2024-06-28 00:37:38,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873357317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:38,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:38,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:37:38,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750175048] [2024-06-28 00:37:38,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:38,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:37:38,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:38,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:37:38,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:37:38,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:37:38,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 211 transitions, 2636 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:38,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:38,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:37:38,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:39,895 INFO L124 PetriNetUnfolderBase]: 1684/2613 cut-off events. [2024-06-28 00:37:39,895 INFO L125 PetriNetUnfolderBase]: For 46521/46521 co-relation queries the response was YES. [2024-06-28 00:37:39,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17020 conditions, 2613 events. 1684/2613 cut-off events. For 46521/46521 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13034 event pairs, 397 based on Foata normal form. 3/2606 useless extension candidates. Maximal degree in co-relation 16963. Up to 2296 conditions per place. [2024-06-28 00:37:39,915 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 151 selfloop transitions, 94 changer transitions 0/250 dead transitions. [2024-06-28 00:37:39,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 250 transitions, 3444 flow [2024-06-28 00:37:39,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:37:39,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:37:39,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 00:37:39,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-28 00:37:39,916 INFO L175 Difference]: Start difference. First operand has 124 places, 211 transitions, 2636 flow. Second operand 8 states and 145 transitions. [2024-06-28 00:37:39,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 250 transitions, 3444 flow [2024-06-28 00:37:39,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 250 transitions, 3243 flow, removed 98 selfloop flow, removed 1 redundant places. [2024-06-28 00:37:39,966 INFO L231 Difference]: Finished difference. Result has 132 places, 225 transitions, 2901 flow [2024-06-28 00:37:39,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2435, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2901, PETRI_PLACES=132, PETRI_TRANSITIONS=225} [2024-06-28 00:37:39,967 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-28 00:37:39,967 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 225 transitions, 2901 flow [2024-06-28 00:37:39,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:39,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:39,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:39,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 00:37:39,968 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:37:39,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:39,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1708686410, now seen corresponding path program 6 times [2024-06-28 00:37:39,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:39,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286744978] [2024-06-28 00:37:39,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:39,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:39,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:42,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:42,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:42,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286744978] [2024-06-28 00:37:42,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286744978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:42,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:42,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:37:42,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699955888] [2024-06-28 00:37:42,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:42,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:37:42,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:42,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:37:42,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:37:42,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:37:42,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 225 transitions, 2901 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:42,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:42,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:37:42,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:43,815 INFO L124 PetriNetUnfolderBase]: 1686/2611 cut-off events. [2024-06-28 00:37:43,815 INFO L125 PetriNetUnfolderBase]: For 49795/49795 co-relation queries the response was YES. [2024-06-28 00:37:43,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17634 conditions, 2611 events. 1686/2611 cut-off events. For 49795/49795 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13044 event pairs, 411 based on Foata normal form. 3/2597 useless extension candidates. Maximal degree in co-relation 17573. Up to 2183 conditions per place. [2024-06-28 00:37:43,835 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 127 selfloop transitions, 123 changer transitions 0/255 dead transitions. [2024-06-28 00:37:43,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 255 transitions, 3653 flow [2024-06-28 00:37:43,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:37:43,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:37:43,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-28 00:37:43,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-28 00:37:43,845 INFO L175 Difference]: Start difference. First operand has 132 places, 225 transitions, 2901 flow. Second operand 8 states and 143 transitions. [2024-06-28 00:37:43,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 255 transitions, 3653 flow [2024-06-28 00:37:43,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 255 transitions, 3489 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-28 00:37:43,901 INFO L231 Difference]: Finished difference. Result has 137 places, 230 transitions, 3165 flow [2024-06-28 00:37:43,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2737, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3165, PETRI_PLACES=137, PETRI_TRANSITIONS=230} [2024-06-28 00:37:43,902 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-28 00:37:43,902 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 230 transitions, 3165 flow [2024-06-28 00:37:43,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:43,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:43,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:43,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 00:37:43,902 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)] === [2024-06-28 00:37:43,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:43,903 INFO L85 PathProgramCache]: Analyzing trace with hash -85094088, now seen corresponding path program 2 times [2024-06-28 00:37:43,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:43,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121205475] [2024-06-28 00:37:43,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:43,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:43,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:46,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:46,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:46,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121205475] [2024-06-28 00:37:46,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121205475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:46,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:46,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:37:46,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248210126] [2024-06-28 00:37:46,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:46,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:37:46,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:46,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:37:46,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:37:46,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:37:46,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 230 transitions, 3165 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:46,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:46,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:37:46,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:48,280 INFO L124 PetriNetUnfolderBase]: 1862/2911 cut-off events. [2024-06-28 00:37:48,280 INFO L125 PetriNetUnfolderBase]: For 65611/65611 co-relation queries the response was YES. [2024-06-28 00:37:48,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20101 conditions, 2911 events. 1862/2911 cut-off events. For 65611/65611 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 14938 event pairs, 415 based on Foata normal form. 36/2937 useless extension candidates. Maximal degree in co-relation 20038. Up to 2360 conditions per place. [2024-06-28 00:37:48,302 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 166 selfloop transitions, 102 changer transitions 0/273 dead transitions. [2024-06-28 00:37:48,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 273 transitions, 3978 flow [2024-06-28 00:37:48,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:37:48,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:37:48,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-28 00:37:48,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-28 00:37:48,304 INFO L175 Difference]: Start difference. First operand has 137 places, 230 transitions, 3165 flow. Second operand 9 states and 168 transitions. [2024-06-28 00:37:48,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 273 transitions, 3978 flow [2024-06-28 00:37:48,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 273 transitions, 3704 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-28 00:37:48,434 INFO L231 Difference]: Finished difference. Result has 144 places, 240 transitions, 3341 flow [2024-06-28 00:37:48,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2891, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3341, PETRI_PLACES=144, PETRI_TRANSITIONS=240} [2024-06-28 00:37:48,435 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-28 00:37:48,435 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 240 transitions, 3341 flow [2024-06-28 00:37:48,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:48,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:48,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:48,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 00:37:48,435 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)] === [2024-06-28 00:37:48,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:48,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1708679466, now seen corresponding path program 3 times [2024-06-28 00:37:48,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:48,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877562947] [2024-06-28 00:37:48,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:48,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:48,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:51,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:51,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:51,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877562947] [2024-06-28 00:37:51,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877562947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:51,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:51,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:37:51,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650151264] [2024-06-28 00:37:51,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:51,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:37:51,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:51,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:37:51,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:37:51,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:37:51,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 240 transitions, 3341 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:51,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:51,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:37:51,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:52,659 INFO L124 PetriNetUnfolderBase]: 1882/2960 cut-off events. [2024-06-28 00:37:52,659 INFO L125 PetriNetUnfolderBase]: For 71135/71135 co-relation queries the response was YES. [2024-06-28 00:37:52,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21121 conditions, 2960 events. 1882/2960 cut-off events. For 71135/71135 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 15371 event pairs, 426 based on Foata normal form. 4/2956 useless extension candidates. Maximal degree in co-relation 21055. Up to 2723 conditions per place. [2024-06-28 00:37:52,727 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 230 selfloop transitions, 36 changer transitions 0/271 dead transitions. [2024-06-28 00:37:52,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 271 transitions, 4031 flow [2024-06-28 00:37:52,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:37:52,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:37:52,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-28 00:37:52,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-28 00:37:52,730 INFO L175 Difference]: Start difference. First operand has 144 places, 240 transitions, 3341 flow. Second operand 9 states and 149 transitions. [2024-06-28 00:37:52,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 271 transitions, 4031 flow [2024-06-28 00:37:52,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 271 transitions, 3788 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-28 00:37:52,835 INFO L231 Difference]: Finished difference. Result has 147 places, 242 transitions, 3239 flow [2024-06-28 00:37:52,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3098, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3239, PETRI_PLACES=147, PETRI_TRANSITIONS=242} [2024-06-28 00:37:52,835 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-06-28 00:37:52,835 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 242 transitions, 3239 flow [2024-06-28 00:37:52,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:52,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:52,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:52,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 00:37:52,836 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)] === [2024-06-28 00:37:52,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:52,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1700108586, now seen corresponding path program 4 times [2024-06-28 00:37:52,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:52,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392862045] [2024-06-28 00:37:52,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:52,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:56,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:56,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:56,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392862045] [2024-06-28 00:37:56,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392862045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:56,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:56,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:37:56,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911404643] [2024-06-28 00:37:56,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:56,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:37:56,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:56,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:37:56,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:37:56,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:37:56,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 242 transitions, 3239 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:56,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:56,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:37:56,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:57,209 INFO L124 PetriNetUnfolderBase]: 1902/2985 cut-off events. [2024-06-28 00:37:57,209 INFO L125 PetriNetUnfolderBase]: For 73555/73555 co-relation queries the response was YES. [2024-06-28 00:37:57,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21122 conditions, 2985 events. 1902/2985 cut-off events. For 73555/73555 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 15463 event pairs, 390 based on Foata normal form. 4/2981 useless extension candidates. Maximal degree in co-relation 21055. Up to 2568 conditions per place. [2024-06-28 00:37:57,228 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 219 selfloop transitions, 61 changer transitions 0/285 dead transitions. [2024-06-28 00:37:57,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 285 transitions, 4204 flow [2024-06-28 00:37:57,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:37:57,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:37:57,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-28 00:37:57,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 00:37:57,230 INFO L175 Difference]: Start difference. First operand has 147 places, 242 transitions, 3239 flow. Second operand 9 states and 153 transitions. [2024-06-28 00:37:57,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 285 transitions, 4204 flow [2024-06-28 00:37:57,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 285 transitions, 4081 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-28 00:37:57,306 INFO L231 Difference]: Finished difference. Result has 151 places, 252 transitions, 3488 flow [2024-06-28 00:37:57,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3116, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3488, PETRI_PLACES=151, PETRI_TRANSITIONS=252} [2024-06-28 00:37:57,306 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 108 predicate places. [2024-06-28 00:37:57,307 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 252 transitions, 3488 flow [2024-06-28 00:37:57,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:57,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:57,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:57,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 00:37:57,307 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)] === [2024-06-28 00:37:57,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:57,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1700405256, now seen corresponding path program 5 times [2024-06-28 00:37:57,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:57,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58193693] [2024-06-28 00:37:57,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:57,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:57,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:00,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:00,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:00,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58193693] [2024-06-28 00:38:00,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58193693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:00,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:00,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:38:00,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171397567] [2024-06-28 00:38:00,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:00,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:38:00,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:00,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:38:00,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:38:00,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:38:00,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 252 transitions, 3488 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:00,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:00,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:38:00,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:01,459 INFO L124 PetriNetUnfolderBase]: 1894/2967 cut-off events. [2024-06-28 00:38:01,459 INFO L125 PetriNetUnfolderBase]: For 76838/76838 co-relation queries the response was YES. [2024-06-28 00:38:01,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21385 conditions, 2967 events. 1894/2967 cut-off events. For 76838/76838 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 15318 event pairs, 424 based on Foata normal form. 4/2963 useless extension candidates. Maximal degree in co-relation 21315. Up to 2692 conditions per place. [2024-06-28 00:38:01,480 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 227 selfloop transitions, 50 changer transitions 0/282 dead transitions. [2024-06-28 00:38:01,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 282 transitions, 4154 flow [2024-06-28 00:38:01,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:38:01,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:38:01,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-28 00:38:01,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-28 00:38:01,482 INFO L175 Difference]: Start difference. First operand has 151 places, 252 transitions, 3488 flow. Second operand 8 states and 142 transitions. [2024-06-28 00:38:01,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 282 transitions, 4154 flow [2024-06-28 00:38:01,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 282 transitions, 3989 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-06-28 00:38:01,595 INFO L231 Difference]: Finished difference. Result has 156 places, 253 transitions, 3464 flow [2024-06-28 00:38:01,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3323, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3464, PETRI_PLACES=156, PETRI_TRANSITIONS=253} [2024-06-28 00:38:01,595 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-28 00:38:01,596 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 253 transitions, 3464 flow [2024-06-28 00:38:01,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:01,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:01,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:01,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 00:38:01,596 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:01,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:01,596 INFO L85 PathProgramCache]: Analyzing trace with hash -367464101, now seen corresponding path program 1 times [2024-06-28 00:38:01,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:01,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265594175] [2024-06-28 00:38:01,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:01,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:01,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:04,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:04,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:04,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265594175] [2024-06-28 00:38:04,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265594175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:04,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:04,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:38:04,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595872484] [2024-06-28 00:38:04,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:04,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:38:04,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:04,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:38:04,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:38:04,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:38:04,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 253 transitions, 3464 flow. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:04,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:04,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:38:04,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:04,988 INFO L124 PetriNetUnfolderBase]: 1851/2911 cut-off events. [2024-06-28 00:38:04,988 INFO L125 PetriNetUnfolderBase]: For 79597/79597 co-relation queries the response was YES. [2024-06-28 00:38:05,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20964 conditions, 2911 events. 1851/2911 cut-off events. For 79597/79597 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 15202 event pairs, 656 based on Foata normal form. 3/2911 useless extension candidates. Maximal degree in co-relation 20891. Up to 2780 conditions per place. [2024-06-28 00:38:05,013 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 243 selfloop transitions, 14 changer transitions 0/262 dead transitions. [2024-06-28 00:38:05,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 262 transitions, 3984 flow [2024-06-28 00:38:05,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:38:05,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:38:05,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-06-28 00:38:05,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-28 00:38:05,014 INFO L175 Difference]: Start difference. First operand has 156 places, 253 transitions, 3464 flow. Second operand 5 states and 87 transitions. [2024-06-28 00:38:05,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 262 transitions, 3984 flow [2024-06-28 00:38:05,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 262 transitions, 3867 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-28 00:38:05,106 INFO L231 Difference]: Finished difference. Result has 156 places, 253 transitions, 3373 flow [2024-06-28 00:38:05,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3299, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3373, PETRI_PLACES=156, PETRI_TRANSITIONS=253} [2024-06-28 00:38:05,107 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-28 00:38:05,107 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 253 transitions, 3373 flow [2024-06-28 00:38:05,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:05,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:05,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:05,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 00:38:05,108 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)] === [2024-06-28 00:38:05,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:05,108 INFO L85 PathProgramCache]: Analyzing trace with hash 764967230, now seen corresponding path program 1 times [2024-06-28 00:38:05,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:05,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062847764] [2024-06-28 00:38:05,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:05,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:05,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:08,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:08,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:08,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062847764] [2024-06-28 00:38:08,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062847764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:08,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:08,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:38:08,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687977217] [2024-06-28 00:38:08,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:08,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:38:08,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:08,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:38:08,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:38:08,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:38:08,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 253 transitions, 3373 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:08,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:08,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:38:08,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:09,330 INFO L124 PetriNetUnfolderBase]: 1887/2959 cut-off events. [2024-06-28 00:38:09,330 INFO L125 PetriNetUnfolderBase]: For 77580/77580 co-relation queries the response was YES. [2024-06-28 00:38:09,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21424 conditions, 2959 events. 1887/2959 cut-off events. For 77580/77580 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 15241 event pairs, 401 based on Foata normal form. 3/2960 useless extension candidates. Maximal degree in co-relation 21349. Up to 2646 conditions per place. [2024-06-28 00:38:09,354 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 212 selfloop transitions, 86 changer transitions 0/303 dead transitions. [2024-06-28 00:38:09,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 303 transitions, 4223 flow [2024-06-28 00:38:09,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:38:09,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:38:09,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-28 00:38:09,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 00:38:09,356 INFO L175 Difference]: Start difference. First operand has 156 places, 253 transitions, 3373 flow. Second operand 9 states and 171 transitions. [2024-06-28 00:38:09,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 303 transitions, 4223 flow [2024-06-28 00:38:09,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 303 transitions, 4195 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-28 00:38:09,462 INFO L231 Difference]: Finished difference. Result has 162 places, 261 transitions, 3652 flow [2024-06-28 00:38:09,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3345, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3652, PETRI_PLACES=162, PETRI_TRANSITIONS=261} [2024-06-28 00:38:09,463 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-28 00:38:09,463 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 261 transitions, 3652 flow [2024-06-28 00:38:09,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:09,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:09,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:09,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 00:38:09,464 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)] === [2024-06-28 00:38:09,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:09,464 INFO L85 PathProgramCache]: Analyzing trace with hash 677537266, now seen corresponding path program 2 times [2024-06-28 00:38:09,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:09,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207822567] [2024-06-28 00:38:09,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:09,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:09,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:12,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:12,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:12,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207822567] [2024-06-28 00:38:12,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207822567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:12,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:12,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:38:12,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009444302] [2024-06-28 00:38:12,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:12,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:38:12,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:12,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:38:12,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:38:12,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:38:12,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 261 transitions, 3652 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:12,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:12,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:38:12,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:13,934 INFO L124 PetriNetUnfolderBase]: 1970/3073 cut-off events. [2024-06-28 00:38:13,934 INFO L125 PetriNetUnfolderBase]: For 85704/85704 co-relation queries the response was YES. [2024-06-28 00:38:13,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22948 conditions, 3073 events. 1970/3073 cut-off events. For 85704/85704 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 15900 event pairs, 412 based on Foata normal form. 3/3073 useless extension candidates. Maximal degree in co-relation 22871. Up to 2563 conditions per place. [2024-06-28 00:38:13,961 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 193 selfloop transitions, 122 changer transitions 0/320 dead transitions. [2024-06-28 00:38:13,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 320 transitions, 4898 flow [2024-06-28 00:38:13,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:38:13,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:38:13,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-28 00:38:13,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-28 00:38:13,962 INFO L175 Difference]: Start difference. First operand has 162 places, 261 transitions, 3652 flow. Second operand 9 states and 174 transitions. [2024-06-28 00:38:13,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 320 transitions, 4898 flow [2024-06-28 00:38:14,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 320 transitions, 4715 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-28 00:38:14,092 INFO L231 Difference]: Finished difference. Result has 166 places, 275 transitions, 3987 flow [2024-06-28 00:38:14,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3469, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3987, PETRI_PLACES=166, PETRI_TRANSITIONS=275} [2024-06-28 00:38:14,093 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-28 00:38:14,093 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 275 transitions, 3987 flow [2024-06-28 00:38:14,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:14,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:14,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:14,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 00:38:14,094 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)] === [2024-06-28 00:38:14,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:14,094 INFO L85 PathProgramCache]: Analyzing trace with hash 680303106, now seen corresponding path program 3 times [2024-06-28 00:38:14,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:14,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319835118] [2024-06-28 00:38:14,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:14,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:14,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:17,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:17,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:17,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319835118] [2024-06-28 00:38:17,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319835118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:17,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:17,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:38:17,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86995389] [2024-06-28 00:38:17,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:17,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:38:17,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:17,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:38:17,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:38:17,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:38:17,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 275 transitions, 3987 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:17,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:17,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:38:17,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:18,483 INFO L124 PetriNetUnfolderBase]: 1972/3076 cut-off events. [2024-06-28 00:38:18,484 INFO L125 PetriNetUnfolderBase]: For 93126/93126 co-relation queries the response was YES. [2024-06-28 00:38:18,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23812 conditions, 3076 events. 1972/3076 cut-off events. For 93126/93126 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 15893 event pairs, 414 based on Foata normal form. 3/3076 useless extension candidates. Maximal degree in co-relation 23733. Up to 2700 conditions per place. [2024-06-28 00:38:18,509 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 209 selfloop transitions, 105 changer transitions 0/319 dead transitions. [2024-06-28 00:38:18,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 319 transitions, 4906 flow [2024-06-28 00:38:18,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:38:18,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:38:18,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-28 00:38:18,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 00:38:18,511 INFO L175 Difference]: Start difference. First operand has 166 places, 275 transitions, 3987 flow. Second operand 9 states and 171 transitions. [2024-06-28 00:38:18,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 319 transitions, 4906 flow [2024-06-28 00:38:18,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 319 transitions, 4767 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-28 00:38:18,649 INFO L231 Difference]: Finished difference. Result has 170 places, 279 transitions, 4167 flow [2024-06-28 00:38:18,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3852, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4167, PETRI_PLACES=170, PETRI_TRANSITIONS=279} [2024-06-28 00:38:18,650 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-28 00:38:18,650 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 279 transitions, 4167 flow [2024-06-28 00:38:18,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:18,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:18,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:18,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 00:38:18,651 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)] === [2024-06-28 00:38:18,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:18,651 INFO L85 PathProgramCache]: Analyzing trace with hash 705282350, now seen corresponding path program 4 times [2024-06-28 00:38:18,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:18,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305169430] [2024-06-28 00:38:18,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:18,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:21,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:21,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:21,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305169430] [2024-06-28 00:38:21,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305169430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:21,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:21,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:38:21,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133174769] [2024-06-28 00:38:21,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:21,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:38:21,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:21,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:38:21,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:38:21,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:38:21,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 279 transitions, 4167 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:21,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:21,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:38:21,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:22,437 INFO L124 PetriNetUnfolderBase]: 1978/3090 cut-off events. [2024-06-28 00:38:22,437 INFO L125 PetriNetUnfolderBase]: For 95883/95883 co-relation queries the response was YES. [2024-06-28 00:38:22,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24255 conditions, 3090 events. 1978/3090 cut-off events. For 95883/95883 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 16028 event pairs, 404 based on Foata normal form. 3/3091 useless extension candidates. Maximal degree in co-relation 24174. Up to 2776 conditions per place. [2024-06-28 00:38:22,463 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 232 selfloop transitions, 93 changer transitions 0/330 dead transitions. [2024-06-28 00:38:22,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 330 transitions, 5085 flow [2024-06-28 00:38:22,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:38:22,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:38:22,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-28 00:38:22,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-28 00:38:22,465 INFO L175 Difference]: Start difference. First operand has 170 places, 279 transitions, 4167 flow. Second operand 9 states and 170 transitions. [2024-06-28 00:38:22,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 330 transitions, 5085 flow [2024-06-28 00:38:22,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 330 transitions, 4811 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-28 00:38:22,611 INFO L231 Difference]: Finished difference. Result has 172 places, 288 transitions, 4238 flow [2024-06-28 00:38:22,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3893, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4238, PETRI_PLACES=172, PETRI_TRANSITIONS=288} [2024-06-28 00:38:22,612 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 129 predicate places. [2024-06-28 00:38:22,612 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 288 transitions, 4238 flow [2024-06-28 00:38:22,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:22,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:22,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:22,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 00:38:22,612 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)] === [2024-06-28 00:38:22,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:22,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1370520316, now seen corresponding path program 5 times [2024-06-28 00:38:22,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:22,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569561065] [2024-06-28 00:38:22,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:22,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:22,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:25,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:25,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:25,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569561065] [2024-06-28 00:38:25,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569561065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:25,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:25,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:38:25,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994188351] [2024-06-28 00:38:25,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:25,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:38:25,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:25,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:38:25,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:38:25,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:38:25,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 288 transitions, 4238 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:25,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:25,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:38:25,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:27,304 INFO L124 PetriNetUnfolderBase]: 2014/3142 cut-off events. [2024-06-28 00:38:27,304 INFO L125 PetriNetUnfolderBase]: For 100818/100818 co-relation queries the response was YES. [2024-06-28 00:38:27,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24633 conditions, 3142 events. 2014/3142 cut-off events. For 100818/100818 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 16284 event pairs, 417 based on Foata normal form. 3/3135 useless extension candidates. Maximal degree in co-relation 24551. Up to 2782 conditions per place. [2024-06-28 00:38:27,333 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 221 selfloop transitions, 99 changer transitions 0/325 dead transitions. [2024-06-28 00:38:27,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 325 transitions, 5089 flow [2024-06-28 00:38:27,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:38:27,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:38:27,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-28 00:38:27,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-28 00:38:27,335 INFO L175 Difference]: Start difference. First operand has 172 places, 288 transitions, 4238 flow. Second operand 9 states and 161 transitions. [2024-06-28 00:38:27,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 325 transitions, 5089 flow [2024-06-28 00:38:27,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 325 transitions, 4907 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-28 00:38:27,508 INFO L231 Difference]: Finished difference. Result has 175 places, 296 transitions, 4399 flow [2024-06-28 00:38:27,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4056, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4399, PETRI_PLACES=175, PETRI_TRANSITIONS=296} [2024-06-28 00:38:27,509 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 132 predicate places. [2024-06-28 00:38:27,509 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 296 transitions, 4399 flow [2024-06-28 00:38:27,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:27,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:27,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:27,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 00:38:27,510 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)] === [2024-06-28 00:38:27,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:27,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1533230314, now seen corresponding path program 6 times [2024-06-28 00:38:27,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:27,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319354607] [2024-06-28 00:38:27,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:27,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:27,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:30,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:30,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:30,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319354607] [2024-06-28 00:38:30,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319354607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:30,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:30,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:38:30,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801229575] [2024-06-28 00:38:30,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:30,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:38:30,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:30,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:38:30,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:38:30,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:38:30,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 296 transitions, 4399 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:30,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:30,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:38:30,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:32,352 INFO L124 PetriNetUnfolderBase]: 2082/3250 cut-off events. [2024-06-28 00:38:32,410 INFO L125 PetriNetUnfolderBase]: For 109839/109839 co-relation queries the response was YES. [2024-06-28 00:38:32,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26226 conditions, 3250 events. 2082/3250 cut-off events. For 109839/109839 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 17001 event pairs, 417 based on Foata normal form. 3/3243 useless extension candidates. Maximal degree in co-relation 26143. Up to 2758 conditions per place. [2024-06-28 00:38:32,438 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 212 selfloop transitions, 124 changer transitions 0/341 dead transitions. [2024-06-28 00:38:32,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 341 transitions, 5543 flow [2024-06-28 00:38:32,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:38:32,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:38:32,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-28 00:38:32,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-28 00:38:32,440 INFO L175 Difference]: Start difference. First operand has 175 places, 296 transitions, 4399 flow. Second operand 8 states and 155 transitions. [2024-06-28 00:38:32,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 341 transitions, 5543 flow [2024-06-28 00:38:32,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 341 transitions, 5317 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-28 00:38:32,613 INFO L231 Difference]: Finished difference. Result has 178 places, 310 transitions, 4761 flow [2024-06-28 00:38:32,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4173, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4761, PETRI_PLACES=178, PETRI_TRANSITIONS=310} [2024-06-28 00:38:32,614 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-28 00:38:32,614 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 310 transitions, 4761 flow [2024-06-28 00:38:32,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:32,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:32,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:32,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 00:38:32,615 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)] === [2024-06-28 00:38:32,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:32,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1402702824, now seen corresponding path program 7 times [2024-06-28 00:38:32,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:32,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626911531] [2024-06-28 00:38:32,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:32,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:32,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:36,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:36,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:36,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626911531] [2024-06-28 00:38:36,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626911531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:36,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:36,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:38:36,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051946299] [2024-06-28 00:38:36,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:36,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:38:36,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:36,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:38:36,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:38:36,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:38:36,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 310 transitions, 4761 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:36,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:36,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:38:36,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:38,054 INFO L124 PetriNetUnfolderBase]: 2136/3328 cut-off events. [2024-06-28 00:38:38,054 INFO L125 PetriNetUnfolderBase]: For 121910/121910 co-relation queries the response was YES. [2024-06-28 00:38:38,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27924 conditions, 3328 events. 2136/3328 cut-off events. For 121910/121910 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 17482 event pairs, 430 based on Foata normal form. 3/3314 useless extension candidates. Maximal degree in co-relation 27839. Up to 2806 conditions per place. [2024-06-28 00:38:38,083 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 215 selfloop transitions, 131 changer transitions 0/351 dead transitions. [2024-06-28 00:38:38,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 351 transitions, 6071 flow [2024-06-28 00:38:38,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:38:38,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:38:38,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-28 00:38:38,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-28 00:38:38,085 INFO L175 Difference]: Start difference. First operand has 178 places, 310 transitions, 4761 flow. Second operand 8 states and 156 transitions. [2024-06-28 00:38:38,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 351 transitions, 6071 flow [2024-06-28 00:38:38,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 351 transitions, 5954 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-28 00:38:38,345 INFO L231 Difference]: Finished difference. Result has 183 places, 317 transitions, 5086 flow [2024-06-28 00:38:38,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4644, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5086, PETRI_PLACES=183, PETRI_TRANSITIONS=317} [2024-06-28 00:38:38,345 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-28 00:38:38,345 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 317 transitions, 5086 flow [2024-06-28 00:38:38,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:38,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:38,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:38,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 00:38:38,346 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)] === [2024-06-28 00:38:38,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:38,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1429669284, now seen corresponding path program 8 times [2024-06-28 00:38:38,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:38,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762242757] [2024-06-28 00:38:38,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:38,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:38,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:41,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:41,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:41,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762242757] [2024-06-28 00:38:41,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762242757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:41,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:41,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:38:41,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043077662] [2024-06-28 00:38:41,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:41,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:38:41,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:41,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:38:41,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:38:41,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:38:41,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 317 transitions, 5086 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:41,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:41,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:38:41,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:43,361 INFO L124 PetriNetUnfolderBase]: 2138/3331 cut-off events. [2024-06-28 00:38:43,361 INFO L125 PetriNetUnfolderBase]: For 129631/129631 co-relation queries the response was YES. [2024-06-28 00:38:43,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28933 conditions, 3331 events. 2138/3331 cut-off events. For 129631/129631 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 17504 event pairs, 429 based on Foata normal form. 3/3317 useless extension candidates. Maximal degree in co-relation 28845. Up to 2855 conditions per place. [2024-06-28 00:38:43,406 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 221 selfloop transitions, 125 changer transitions 0/351 dead transitions. [2024-06-28 00:38:43,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 351 transitions, 6137 flow [2024-06-28 00:38:43,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:38:43,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:38:43,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-28 00:38:43,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 00:38:43,408 INFO L175 Difference]: Start difference. First operand has 183 places, 317 transitions, 5086 flow. Second operand 8 states and 152 transitions. [2024-06-28 00:38:43,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 351 transitions, 6137 flow [2024-06-28 00:38:43,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 351 transitions, 5925 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-28 00:38:43,679 INFO L231 Difference]: Finished difference. Result has 187 places, 321 transitions, 5254 flow [2024-06-28 00:38:43,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4890, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5254, PETRI_PLACES=187, PETRI_TRANSITIONS=321} [2024-06-28 00:38:43,680 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-28 00:38:43,680 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 321 transitions, 5254 flow [2024-06-28 00:38:43,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:43,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:43,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:43,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 00:38:43,681 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)] === [2024-06-28 00:38:43,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:43,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1172961384, now seen corresponding path program 9 times [2024-06-28 00:38:43,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:43,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404137669] [2024-06-28 00:38:43,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:43,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:43,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:47,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:47,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:47,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404137669] [2024-06-28 00:38:47,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404137669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:47,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:47,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:38:47,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155961761] [2024-06-28 00:38:47,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:47,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:38:47,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:47,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:38:47,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:38:48,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:38:48,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 321 transitions, 5254 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:48,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:48,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:38:48,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:49,561 INFO L124 PetriNetUnfolderBase]: 2164/3370 cut-off events. [2024-06-28 00:38:49,561 INFO L125 PetriNetUnfolderBase]: For 134794/134794 co-relation queries the response was YES. [2024-06-28 00:38:49,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29807 conditions, 3370 events. 2164/3370 cut-off events. For 134794/134794 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 17745 event pairs, 427 based on Foata normal form. 3/3356 useless extension candidates. Maximal degree in co-relation 29717. Up to 2537 conditions per place. [2024-06-28 00:38:49,594 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 157 selfloop transitions, 202 changer transitions 0/364 dead transitions. [2024-06-28 00:38:49,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 364 transitions, 6612 flow [2024-06-28 00:38:49,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:38:49,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:38:49,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-28 00:38:49,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-28 00:38:49,595 INFO L175 Difference]: Start difference. First operand has 187 places, 321 transitions, 5254 flow. Second operand 8 states and 156 transitions. [2024-06-28 00:38:49,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 364 transitions, 6612 flow [2024-06-28 00:38:49,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 364 transitions, 6287 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-28 00:38:49,798 INFO L231 Difference]: Finished difference. Result has 191 places, 332 transitions, 5729 flow [2024-06-28 00:38:49,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4929, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5729, PETRI_PLACES=191, PETRI_TRANSITIONS=332} [2024-06-28 00:38:49,799 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-28 00:38:49,799 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 332 transitions, 5729 flow [2024-06-28 00:38:49,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:49,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:49,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:49,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 00:38:49,799 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)] === [2024-06-28 00:38:49,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:49,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1576413575, now seen corresponding path program 1 times [2024-06-28 00:38:49,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:49,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590598165] [2024-06-28 00:38:49,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:49,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:49,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:52,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:52,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:52,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590598165] [2024-06-28 00:38:52,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590598165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:52,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:52,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:38:52,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23551201] [2024-06-28 00:38:52,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:52,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:38:52,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:52,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:38:52,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:38:52,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:38:52,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 332 transitions, 5729 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:52,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:52,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:38:52,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:54,088 INFO L124 PetriNetUnfolderBase]: 2228/3487 cut-off events. [2024-06-28 00:38:54,089 INFO L125 PetriNetUnfolderBase]: For 152145/152145 co-relation queries the response was YES. [2024-06-28 00:38:54,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31863 conditions, 3487 events. 2228/3487 cut-off events. For 152145/152145 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 18687 event pairs, 347 based on Foata normal form. 6/3491 useless extension candidates. Maximal degree in co-relation 31770. Up to 3137 conditions per place. [2024-06-28 00:38:54,127 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 311 selfloop transitions, 73 changer transitions 0/389 dead transitions. [2024-06-28 00:38:54,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 389 transitions, 6882 flow [2024-06-28 00:38:54,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:38:54,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:38:54,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 195 transitions. [2024-06-28 00:38:54,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42207792207792205 [2024-06-28 00:38:54,129 INFO L175 Difference]: Start difference. First operand has 191 places, 332 transitions, 5729 flow. Second operand 11 states and 195 transitions. [2024-06-28 00:38:54,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 389 transitions, 6882 flow [2024-06-28 00:38:54,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 389 transitions, 6577 flow, removed 79 selfloop flow, removed 3 redundant places. [2024-06-28 00:38:54,423 INFO L231 Difference]: Finished difference. Result has 202 places, 345 transitions, 5884 flow [2024-06-28 00:38:54,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5433, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5884, PETRI_PLACES=202, PETRI_TRANSITIONS=345} [2024-06-28 00:38:54,424 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 159 predicate places. [2024-06-28 00:38:54,424 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 345 transitions, 5884 flow [2024-06-28 00:38:54,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:54,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:54,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:54,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 00:38:54,424 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)] === [2024-06-28 00:38:54,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:54,424 INFO L85 PathProgramCache]: Analyzing trace with hash -666373553, now seen corresponding path program 2 times [2024-06-28 00:38:54,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:54,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142209591] [2024-06-28 00:38:54,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:54,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:54,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:57,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:57,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:57,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142209591] [2024-06-28 00:38:57,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142209591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:57,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:57,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:38:57,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769180526] [2024-06-28 00:38:57,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:57,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:38:57,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:57,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:38:57,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:38:57,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:38:57,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 345 transitions, 5884 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:57,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:57,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:38:57,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:58,516 INFO L124 PetriNetUnfolderBase]: 2259/3536 cut-off events. [2024-06-28 00:38:58,516 INFO L125 PetriNetUnfolderBase]: For 152597/152597 co-relation queries the response was YES. [2024-06-28 00:38:58,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31804 conditions, 3536 events. 2259/3536 cut-off events. For 152597/152597 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 19010 event pairs, 368 based on Foata normal form. 6/3540 useless extension candidates. Maximal degree in co-relation 31706. Up to 3182 conditions per place. [2024-06-28 00:38:58,553 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 298 selfloop transitions, 84 changer transitions 0/387 dead transitions. [2024-06-28 00:38:58,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 387 transitions, 6866 flow [2024-06-28 00:38:58,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:38:58,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:38:58,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-28 00:38:58,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 00:38:58,554 INFO L175 Difference]: Start difference. First operand has 202 places, 345 transitions, 5884 flow. Second operand 9 states and 171 transitions. [2024-06-28 00:38:58,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 387 transitions, 6866 flow [2024-06-28 00:38:58,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 387 transitions, 6599 flow, removed 92 selfloop flow, removed 5 redundant places. [2024-06-28 00:38:58,862 INFO L231 Difference]: Finished difference. Result has 206 places, 348 transitions, 5897 flow [2024-06-28 00:38:58,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5617, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5897, PETRI_PLACES=206, PETRI_TRANSITIONS=348} [2024-06-28 00:38:58,863 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-28 00:38:58,863 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 348 transitions, 5897 flow [2024-06-28 00:38:58,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:58,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:58,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:58,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 00:38:58,863 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)] === [2024-06-28 00:38:58,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:58,864 INFO L85 PathProgramCache]: Analyzing trace with hash -29901739, now seen corresponding path program 1 times [2024-06-28 00:38:58,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:58,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513797540] [2024-06-28 00:38:58,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:58,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:58,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:02,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:02,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:02,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513797540] [2024-06-28 00:39:02,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513797540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:02,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:02,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:39:02,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839018655] [2024-06-28 00:39:02,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:02,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:39:02,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:02,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:39:02,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:39:02,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:39:02,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 348 transitions, 5897 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:02,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:02,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:39:02,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:03,966 INFO L124 PetriNetUnfolderBase]: 2451/3855 cut-off events. [2024-06-28 00:39:03,966 INFO L125 PetriNetUnfolderBase]: For 180685/180685 co-relation queries the response was YES. [2024-06-28 00:39:03,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34024 conditions, 3855 events. 2451/3855 cut-off events. For 180685/180685 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 21270 event pairs, 396 based on Foata normal form. 24/3877 useless extension candidates. Maximal degree in co-relation 33924. Up to 3225 conditions per place. [2024-06-28 00:39:04,008 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 297 selfloop transitions, 97 changer transitions 0/399 dead transitions. [2024-06-28 00:39:04,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 399 transitions, 6973 flow [2024-06-28 00:39:04,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:39:04,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:39:04,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-28 00:39:04,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 00:39:04,010 INFO L175 Difference]: Start difference. First operand has 206 places, 348 transitions, 5897 flow. Second operand 10 states and 190 transitions. [2024-06-28 00:39:04,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 399 transitions, 6973 flow [2024-06-28 00:39:04,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 399 transitions, 6737 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-28 00:39:04,323 INFO L231 Difference]: Finished difference. Result has 210 places, 352 transitions, 5991 flow [2024-06-28 00:39:04,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5661, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5991, PETRI_PLACES=210, PETRI_TRANSITIONS=352} [2024-06-28 00:39:04,323 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 167 predicate places. [2024-06-28 00:39:04,323 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 352 transitions, 5991 flow [2024-06-28 00:39:04,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:04,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:04,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:04,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 00:39:04,324 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)] === [2024-06-28 00:39:04,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:04,324 INFO L85 PathProgramCache]: Analyzing trace with hash -601212503, now seen corresponding path program 3 times [2024-06-28 00:39:04,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:04,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305132948] [2024-06-28 00:39:04,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:04,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:04,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:07,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:07,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:07,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305132948] [2024-06-28 00:39:07,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305132948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:07,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:07,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:39:07,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169008006] [2024-06-28 00:39:07,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:07,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:39:07,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:07,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:39:07,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:39:07,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:39:07,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 352 transitions, 5991 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:07,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:07,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:39:07,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:09,072 INFO L124 PetriNetUnfolderBase]: 2482/3899 cut-off events. [2024-06-28 00:39:09,072 INFO L125 PetriNetUnfolderBase]: For 174857/174857 co-relation queries the response was YES. [2024-06-28 00:39:09,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34700 conditions, 3899 events. 2482/3899 cut-off events. For 174857/174857 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 21529 event pairs, 414 based on Foata normal form. 6/3902 useless extension candidates. Maximal degree in co-relation 34599. Up to 3480 conditions per place. [2024-06-28 00:39:09,123 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 283 selfloop transitions, 106 changer transitions 0/394 dead transitions. [2024-06-28 00:39:09,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 394 transitions, 7083 flow [2024-06-28 00:39:09,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:39:09,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:39:09,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-28 00:39:09,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 00:39:09,125 INFO L175 Difference]: Start difference. First operand has 210 places, 352 transitions, 5991 flow. Second operand 9 states and 171 transitions. [2024-06-28 00:39:09,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 394 transitions, 7083 flow [2024-06-28 00:39:09,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 394 transitions, 6855 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-28 00:39:09,448 INFO L231 Difference]: Finished difference. Result has 211 places, 355 transitions, 6096 flow [2024-06-28 00:39:09,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5763, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6096, PETRI_PLACES=211, PETRI_TRANSITIONS=355} [2024-06-28 00:39:09,450 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 168 predicate places. [2024-06-28 00:39:09,450 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 355 transitions, 6096 flow [2024-06-28 00:39:09,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:09,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:09,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:09,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 00:39:09,451 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)] === [2024-06-28 00:39:09,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:09,451 INFO L85 PathProgramCache]: Analyzing trace with hash -477608419, now seen corresponding path program 2 times [2024-06-28 00:39:09,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:09,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974002638] [2024-06-28 00:39:09,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:09,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:12,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:12,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:12,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974002638] [2024-06-28 00:39:12,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974002638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:12,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:12,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:39:12,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540976670] [2024-06-28 00:39:12,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:12,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:39:12,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:12,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:39:12,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:39:12,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:39:12,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 355 transitions, 6096 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:12,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:12,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:39:12,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:14,781 INFO L124 PetriNetUnfolderBase]: 2588/4089 cut-off events. [2024-06-28 00:39:14,781 INFO L125 PetriNetUnfolderBase]: For 199376/199376 co-relation queries the response was YES. [2024-06-28 00:39:14,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36147 conditions, 4089 events. 2588/4089 cut-off events. For 199376/199376 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 22965 event pairs, 438 based on Foata normal form. 24/4110 useless extension candidates. Maximal degree in co-relation 36045. Up to 3499 conditions per place. [2024-06-28 00:39:14,828 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 286 selfloop transitions, 113 changer transitions 0/404 dead transitions. [2024-06-28 00:39:14,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 404 transitions, 7242 flow [2024-06-28 00:39:14,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:39:14,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:39:14,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-28 00:39:14,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 00:39:14,830 INFO L175 Difference]: Start difference. First operand has 211 places, 355 transitions, 6096 flow. Second operand 10 states and 190 transitions. [2024-06-28 00:39:14,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 404 transitions, 7242 flow [2024-06-28 00:39:15,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 404 transitions, 6935 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-28 00:39:15,193 INFO L231 Difference]: Finished difference. Result has 214 places, 357 transitions, 6115 flow [2024-06-28 00:39:15,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5789, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6115, PETRI_PLACES=214, PETRI_TRANSITIONS=357} [2024-06-28 00:39:15,193 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-28 00:39:15,194 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 357 transitions, 6115 flow [2024-06-28 00:39:15,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:15,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:15,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:15,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 00:39:15,194 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)] === [2024-06-28 00:39:15,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:15,195 INFO L85 PathProgramCache]: Analyzing trace with hash -470942179, now seen corresponding path program 3 times [2024-06-28 00:39:15,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:15,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653144244] [2024-06-28 00:39:15,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:15,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:15,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:18,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:18,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:18,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653144244] [2024-06-28 00:39:18,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653144244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:18,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:18,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:39:18,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529680668] [2024-06-28 00:39:18,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:18,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:39:18,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:18,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:39:18,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:39:18,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:39:18,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 357 transitions, 6115 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:18,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:18,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:39:18,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:21,046 INFO L124 PetriNetUnfolderBase]: 2905/4610 cut-off events. [2024-06-28 00:39:21,046 INFO L125 PetriNetUnfolderBase]: For 230275/230275 co-relation queries the response was YES. [2024-06-28 00:39:21,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41145 conditions, 4610 events. 2905/4610 cut-off events. For 230275/230275 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 26782 event pairs, 495 based on Foata normal form. 18/4625 useless extension candidates. Maximal degree in co-relation 41042. Up to 2940 conditions per place. [2024-06-28 00:39:21,097 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 266 selfloop transitions, 148 changer transitions 0/419 dead transitions. [2024-06-28 00:39:21,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 419 transitions, 7813 flow [2024-06-28 00:39:21,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:39:21,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:39:21,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-28 00:39:21,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-28 00:39:21,098 INFO L175 Difference]: Start difference. First operand has 214 places, 357 transitions, 6115 flow. Second operand 10 states and 196 transitions. [2024-06-28 00:39:21,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 419 transitions, 7813 flow [2024-06-28 00:39:21,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 419 transitions, 7541 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-28 00:39:21,587 INFO L231 Difference]: Finished difference. Result has 217 places, 362 transitions, 6319 flow [2024-06-28 00:39:21,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5843, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6319, PETRI_PLACES=217, PETRI_TRANSITIONS=362} [2024-06-28 00:39:21,587 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-28 00:39:21,588 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 362 transitions, 6319 flow [2024-06-28 00:39:21,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:21,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:21,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:21,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 00:39:21,588 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)] === [2024-06-28 00:39:21,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:21,589 INFO L85 PathProgramCache]: Analyzing trace with hash -471179329, now seen corresponding path program 4 times [2024-06-28 00:39:21,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:21,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202709190] [2024-06-28 00:39:21,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:21,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:21,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:26,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:26,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:26,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202709190] [2024-06-28 00:39:26,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202709190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:26,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:26,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:39:26,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776886907] [2024-06-28 00:39:26,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:26,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:39:26,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:26,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:39:26,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:39:26,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:39:26,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 362 transitions, 6319 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:26,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:26,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:39:26,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:28,727 INFO L124 PetriNetUnfolderBase]: 3116/4955 cut-off events. [2024-06-28 00:39:28,727 INFO L125 PetriNetUnfolderBase]: For 272209/272209 co-relation queries the response was YES. [2024-06-28 00:39:28,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44927 conditions, 4955 events. 3116/4955 cut-off events. For 272209/272209 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 29324 event pairs, 552 based on Foata normal form. 36/4988 useless extension candidates. Maximal degree in co-relation 44822. Up to 4070 conditions per place. [2024-06-28 00:39:28,779 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 260 selfloop transitions, 170 changer transitions 0/435 dead transitions. [2024-06-28 00:39:28,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 435 transitions, 8119 flow [2024-06-28 00:39:28,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:39:28,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:39:28,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-28 00:39:28,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.461038961038961 [2024-06-28 00:39:28,780 INFO L175 Difference]: Start difference. First operand has 217 places, 362 transitions, 6319 flow. Second operand 11 states and 213 transitions. [2024-06-28 00:39:28,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 435 transitions, 8119 flow [2024-06-28 00:39:29,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 435 transitions, 7916 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-28 00:39:29,264 INFO L231 Difference]: Finished difference. Result has 224 places, 381 transitions, 7126 flow [2024-06-28 00:39:29,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6126, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7126, PETRI_PLACES=224, PETRI_TRANSITIONS=381} [2024-06-28 00:39:29,265 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 181 predicate places. [2024-06-28 00:39:29,265 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 381 transitions, 7126 flow [2024-06-28 00:39:29,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:29,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:29,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:29,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 00:39:29,265 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)] === [2024-06-28 00:39:29,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:29,266 INFO L85 PathProgramCache]: Analyzing trace with hash 479559399, now seen corresponding path program 4 times [2024-06-28 00:39:29,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:29,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594549240] [2024-06-28 00:39:29,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:29,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:29,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:31,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:31,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:31,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594549240] [2024-06-28 00:39:31,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594549240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:31,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:31,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:39:31,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552978508] [2024-06-28 00:39:31,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:31,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:39:31,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:31,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:39:31,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:39:31,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:39:31,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 381 transitions, 7126 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:31,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:31,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:39:31,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:33,287 INFO L124 PetriNetUnfolderBase]: 3218/5129 cut-off events. [2024-06-28 00:39:33,287 INFO L125 PetriNetUnfolderBase]: For 280883/280883 co-relation queries the response was YES. [2024-06-28 00:39:33,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48490 conditions, 5129 events. 3218/5129 cut-off events. For 280883/280883 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 30813 event pairs, 647 based on Foata normal form. 6/5133 useless extension candidates. Maximal degree in co-relation 48381. Up to 4700 conditions per place. [2024-06-28 00:39:33,339 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 349 selfloop transitions, 84 changer transitions 0/438 dead transitions. [2024-06-28 00:39:33,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 438 transitions, 8375 flow [2024-06-28 00:39:33,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:39:33,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:39:33,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-28 00:39:33,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-28 00:39:33,341 INFO L175 Difference]: Start difference. First operand has 224 places, 381 transitions, 7126 flow. Second operand 9 states and 172 transitions. [2024-06-28 00:39:33,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 438 transitions, 8375 flow [2024-06-28 00:39:33,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 438 transitions, 7966 flow, removed 139 selfloop flow, removed 6 redundant places. [2024-06-28 00:39:33,863 INFO L231 Difference]: Finished difference. Result has 228 places, 393 transitions, 7168 flow [2024-06-28 00:39:33,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6717, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7168, PETRI_PLACES=228, PETRI_TRANSITIONS=393} [2024-06-28 00:39:33,864 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-28 00:39:33,864 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 393 transitions, 7168 flow [2024-06-28 00:39:33,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:33,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:33,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:33,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 00:39:33,865 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)] === [2024-06-28 00:39:33,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:33,865 INFO L85 PathProgramCache]: Analyzing trace with hash 451000949, now seen corresponding path program 5 times [2024-06-28 00:39:33,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:33,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059108155] [2024-06-28 00:39:33,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:33,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:33,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:36,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:36,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:36,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059108155] [2024-06-28 00:39:36,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059108155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:36,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:36,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:39:36,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861123995] [2024-06-28 00:39:36,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:36,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:39:36,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:36,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:39:36,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:39:36,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:39:36,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 393 transitions, 7168 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:36,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:36,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:39:36,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:38,167 INFO L124 PetriNetUnfolderBase]: 3276/5226 cut-off events. [2024-06-28 00:39:38,167 INFO L125 PetriNetUnfolderBase]: For 284757/284757 co-relation queries the response was YES. [2024-06-28 00:39:38,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48807 conditions, 5226 events. 3276/5226 cut-off events. For 284757/284757 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 31539 event pairs, 681 based on Foata normal form. 6/5230 useless extension candidates. Maximal degree in co-relation 48695. Up to 4820 conditions per place. [2024-06-28 00:39:38,217 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 350 selfloop transitions, 93 changer transitions 0/448 dead transitions. [2024-06-28 00:39:38,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 448 transitions, 8464 flow [2024-06-28 00:39:38,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:39:38,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:39:38,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-28 00:39:38,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-28 00:39:38,219 INFO L175 Difference]: Start difference. First operand has 228 places, 393 transitions, 7168 flow. Second operand 9 states and 172 transitions. [2024-06-28 00:39:38,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 448 transitions, 8464 flow [2024-06-28 00:39:38,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 448 transitions, 8137 flow, removed 115 selfloop flow, removed 5 redundant places. [2024-06-28 00:39:38,747 INFO L231 Difference]: Finished difference. Result has 233 places, 405 transitions, 7339 flow [2024-06-28 00:39:38,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6849, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7339, PETRI_PLACES=233, PETRI_TRANSITIONS=405} [2024-06-28 00:39:38,747 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-28 00:39:38,748 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 405 transitions, 7339 flow [2024-06-28 00:39:38,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:38,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:38,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:38,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 00:39:38,748 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)] === [2024-06-28 00:39:38,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:38,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1802276943, now seen corresponding path program 6 times [2024-06-28 00:39:38,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:38,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039765356] [2024-06-28 00:39:38,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:38,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:38,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:40,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:40,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:40,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039765356] [2024-06-28 00:39:40,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039765356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:40,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:40,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:39:40,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043517070] [2024-06-28 00:39:40,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:40,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:39:40,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:40,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:39:40,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:39:40,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:39:40,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 405 transitions, 7339 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) [2024-06-28 00:39:40,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:40,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:39:40,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:42,431 INFO L124 PetriNetUnfolderBase]: 2772/4680 cut-off events. [2024-06-28 00:39:42,432 INFO L125 PetriNetUnfolderBase]: For 291310/291554 co-relation queries the response was YES. [2024-06-28 00:39:42,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44612 conditions, 4680 events. 2772/4680 cut-off events. For 291310/291554 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 30201 event pairs, 388 based on Foata normal form. 43/4593 useless extension candidates. Maximal degree in co-relation 44497. Up to 3260 conditions per place. [2024-06-28 00:39:42,486 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 253 selfloop transitions, 103 changer transitions 0/453 dead transitions. [2024-06-28 00:39:42,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 453 transitions, 8492 flow [2024-06-28 00:39:42,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:39:42,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:39:42,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-28 00:39:42,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5059523809523809 [2024-06-28 00:39:42,489 INFO L175 Difference]: Start difference. First operand has 233 places, 405 transitions, 7339 flow. Second operand 8 states and 170 transitions. [2024-06-28 00:39:42,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 453 transitions, 8492 flow [2024-06-28 00:39:43,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 453 transitions, 8277 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-28 00:39:43,185 INFO L231 Difference]: Finished difference. Result has 238 places, 414 transitions, 7606 flow [2024-06-28 00:39:43,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7124, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7606, PETRI_PLACES=238, PETRI_TRANSITIONS=414} [2024-06-28 00:39:43,186 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-28 00:39:43,187 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 414 transitions, 7606 flow [2024-06-28 00:39:43,187 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) [2024-06-28 00:39:43,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:43,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:43,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 00:39:43,187 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:39:43,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:43,188 INFO L85 PathProgramCache]: Analyzing trace with hash -223507149, now seen corresponding path program 5 times [2024-06-28 00:39:43,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:43,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145012140] [2024-06-28 00:39:43,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:43,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:43,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:46,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:46,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:46,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145012140] [2024-06-28 00:39:46,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145012140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:46,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:46,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:39:46,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992945075] [2024-06-28 00:39:46,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:46,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:39:46,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:46,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:39:46,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:39:46,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:39:46,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 414 transitions, 7606 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:46,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:46,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:39:46,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:48,554 INFO L124 PetriNetUnfolderBase]: 3438/5491 cut-off events. [2024-06-28 00:39:48,554 INFO L125 PetriNetUnfolderBase]: For 311234/311234 co-relation queries the response was YES. [2024-06-28 00:39:48,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50738 conditions, 5491 events. 3438/5491 cut-off events. For 311234/311234 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 33452 event pairs, 648 based on Foata normal form. 24/5513 useless extension candidates. Maximal degree in co-relation 50621. Up to 4750 conditions per place. [2024-06-28 00:39:48,614 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 357 selfloop transitions, 108 changer transitions 0/470 dead transitions. [2024-06-28 00:39:48,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 470 transitions, 8933 flow [2024-06-28 00:39:48,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:39:48,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:39:48,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-28 00:39:48,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-28 00:39:48,616 INFO L175 Difference]: Start difference. First operand has 238 places, 414 transitions, 7606 flow. Second operand 10 states and 189 transitions. [2024-06-28 00:39:48,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 470 transitions, 8933 flow [2024-06-28 00:39:49,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 470 transitions, 8706 flow, removed 56 selfloop flow, removed 4 redundant places. [2024-06-28 00:39:49,227 INFO L231 Difference]: Finished difference. Result has 244 places, 420 transitions, 7822 flow [2024-06-28 00:39:49,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7391, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7822, PETRI_PLACES=244, PETRI_TRANSITIONS=420} [2024-06-28 00:39:49,228 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-28 00:39:49,228 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 420 transitions, 7822 flow [2024-06-28 00:39:49,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:49,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:49,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:49,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 00:39:49,228 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:39:49,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:49,228 INFO L85 PathProgramCache]: Analyzing trace with hash 955329622, now seen corresponding path program 1 times [2024-06-28 00:39:49,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:49,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703448094] [2024-06-28 00:39:49,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:49,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:49,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:51,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:51,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:51,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703448094] [2024-06-28 00:39:51,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703448094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:51,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:51,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:39:51,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256114214] [2024-06-28 00:39:51,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:51,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:39:51,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:51,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:39:51,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:39:52,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:39:52,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 420 transitions, 7822 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:52,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:52,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:39:52,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:53,879 INFO L124 PetriNetUnfolderBase]: 3380/5382 cut-off events. [2024-06-28 00:39:53,879 INFO L125 PetriNetUnfolderBase]: For 288771/288771 co-relation queries the response was YES. [2024-06-28 00:39:53,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49821 conditions, 5382 events. 3380/5382 cut-off events. For 288771/288771 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 32619 event pairs, 607 based on Foata normal form. 2/5382 useless extension candidates. Maximal degree in co-relation 49703. Up to 5080 conditions per place. [2024-06-28 00:39:53,939 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 361 selfloop transitions, 67 changer transitions 0/433 dead transitions. [2024-06-28 00:39:53,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 433 transitions, 8547 flow [2024-06-28 00:39:53,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:39:53,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:39:53,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-28 00:39:53,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-28 00:39:53,940 INFO L175 Difference]: Start difference. First operand has 244 places, 420 transitions, 7822 flow. Second operand 7 states and 128 transitions. [2024-06-28 00:39:53,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 433 transitions, 8547 flow [2024-06-28 00:39:54,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 433 transitions, 8273 flow, removed 32 selfloop flow, removed 10 redundant places. [2024-06-28 00:39:54,475 INFO L231 Difference]: Finished difference. Result has 240 places, 410 transitions, 7485 flow [2024-06-28 00:39:54,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7351, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7485, PETRI_PLACES=240, PETRI_TRANSITIONS=410} [2024-06-28 00:39:54,476 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-28 00:39:54,476 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 410 transitions, 7485 flow [2024-06-28 00:39:54,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:54,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:54,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:54,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 00:39:54,477 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)] === [2024-06-28 00:39:54,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:54,477 INFO L85 PathProgramCache]: Analyzing trace with hash -747333483, now seen corresponding path program 7 times [2024-06-28 00:39:54,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:54,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147439216] [2024-06-28 00:39:54,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:54,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:54,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:57,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:57,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:57,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147439216] [2024-06-28 00:39:57,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147439216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:57,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:57,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:39:57,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831108961] [2024-06-28 00:39:57,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:57,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:39:57,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:57,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:39:57,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:39:57,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:39:57,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 410 transitions, 7485 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:57,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:57,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:39:57,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:59,772 INFO L124 PetriNetUnfolderBase]: 3535/5625 cut-off events. [2024-06-28 00:39:59,772 INFO L125 PetriNetUnfolderBase]: For 295723/295723 co-relation queries the response was YES. [2024-06-28 00:39:59,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50720 conditions, 5625 events. 3535/5625 cut-off events. For 295723/295723 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 34325 event pairs, 636 based on Foata normal form. 6/5621 useless extension candidates. Maximal degree in co-relation 50604. Up to 5124 conditions per place. [2024-06-28 00:39:59,845 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 366 selfloop transitions, 97 changer transitions 0/468 dead transitions. [2024-06-28 00:39:59,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 468 transitions, 8913 flow [2024-06-28 00:39:59,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:39:59,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:39:59,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 199 transitions. [2024-06-28 00:39:59,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3948412698412698 [2024-06-28 00:39:59,847 INFO L175 Difference]: Start difference. First operand has 240 places, 410 transitions, 7485 flow. Second operand 12 states and 199 transitions. [2024-06-28 00:39:59,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 468 transitions, 8913 flow [2024-06-28 00:40:00,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 468 transitions, 8779 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 00:40:00,465 INFO L231 Difference]: Finished difference. Result has 247 places, 431 transitions, 8016 flow [2024-06-28 00:40:00,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7351, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8016, PETRI_PLACES=247, PETRI_TRANSITIONS=431} [2024-06-28 00:40:00,465 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-28 00:40:00,465 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 431 transitions, 8016 flow [2024-06-28 00:40:00,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:00,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:40:00,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:40:00,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 00:40:00,466 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)] === [2024-06-28 00:40:00,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:40:00,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1510453383, now seen corresponding path program 8 times [2024-06-28 00:40:00,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:40:00,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530483389] [2024-06-28 00:40:00,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:40:00,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:40:00,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:40:03,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:40:03,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:40:03,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530483389] [2024-06-28 00:40:03,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530483389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:40:03,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:40:03,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:40:03,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205667438] [2024-06-28 00:40:03,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:40:03,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:40:03,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:40:03,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:40:03,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:40:03,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:40:03,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 431 transitions, 8016 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:03,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:40:03,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:40:03,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:40:05,513 INFO L124 PetriNetUnfolderBase]: 3610/5744 cut-off events. [2024-06-28 00:40:05,513 INFO L125 PetriNetUnfolderBase]: For 314928/314928 co-relation queries the response was YES. [2024-06-28 00:40:05,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52523 conditions, 5744 events. 3610/5744 cut-off events. For 314928/314928 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 35203 event pairs, 682 based on Foata normal form. 6/5740 useless extension candidates. Maximal degree in co-relation 52405. Up to 5333 conditions per place. [2024-06-28 00:40:05,582 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 379 selfloop transitions, 87 changer transitions 0/471 dead transitions. [2024-06-28 00:40:05,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 471 transitions, 9232 flow [2024-06-28 00:40:05,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:40:05,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:40:05,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-28 00:40:05,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-28 00:40:05,583 INFO L175 Difference]: Start difference. First operand has 247 places, 431 transitions, 8016 flow. Second operand 9 states and 160 transitions. [2024-06-28 00:40:05,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 471 transitions, 9232 flow [2024-06-28 00:40:06,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 471 transitions, 8837 flow, removed 104 selfloop flow, removed 10 redundant places. [2024-06-28 00:40:06,660 INFO L231 Difference]: Finished difference. Result has 246 places, 440 transitions, 8023 flow [2024-06-28 00:40:06,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7621, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8023, PETRI_PLACES=246, PETRI_TRANSITIONS=440} [2024-06-28 00:40:06,661 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-28 00:40:06,661 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 440 transitions, 8023 flow [2024-06-28 00:40:06,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:06,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:40:06,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:40:06,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 00:40:06,662 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)] === [2024-06-28 00:40:06,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:40:06,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1200393525, now seen corresponding path program 9 times [2024-06-28 00:40:06,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:40:06,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408788866] [2024-06-28 00:40:06,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:40:06,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:40:06,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:40:10,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:40:10,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:40:10,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408788866] [2024-06-28 00:40:10,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408788866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:40:10,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:40:10,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:40:10,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782190201] [2024-06-28 00:40:10,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:40:10,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:40:10,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:40:10,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:40:10,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:40:10,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:40:10,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 440 transitions, 8023 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:10,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:40:10,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:40:10,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:40:12,451 INFO L124 PetriNetUnfolderBase]: 3663/5823 cut-off events. [2024-06-28 00:40:12,451 INFO L125 PetriNetUnfolderBase]: For 320639/320639 co-relation queries the response was YES. [2024-06-28 00:40:12,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53287 conditions, 5823 events. 3663/5823 cut-off events. For 320639/320639 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 35771 event pairs, 641 based on Foata normal form. 6/5819 useless extension candidates. Maximal degree in co-relation 53168. Up to 5383 conditions per place. [2024-06-28 00:40:12,519 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 374 selfloop transitions, 97 changer transitions 0/476 dead transitions. [2024-06-28 00:40:12,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 476 transitions, 9234 flow [2024-06-28 00:40:12,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:40:12,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:40:12,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-28 00:40:12,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-28 00:40:12,520 INFO L175 Difference]: Start difference. First operand has 246 places, 440 transitions, 8023 flow. Second operand 9 states and 160 transitions. [2024-06-28 00:40:12,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 476 transitions, 9234 flow [2024-06-28 00:40:13,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 476 transitions, 8940 flow, removed 66 selfloop flow, removed 7 redundant places. [2024-06-28 00:40:13,256 INFO L231 Difference]: Finished difference. Result has 248 places, 446 transitions, 8126 flow [2024-06-28 00:40:13,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7729, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8126, PETRI_PLACES=248, PETRI_TRANSITIONS=446} [2024-06-28 00:40:13,256 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 205 predicate places. [2024-06-28 00:40:13,256 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 446 transitions, 8126 flow [2024-06-28 00:40:13,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:13,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:40:13,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:40:13,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 00:40:13,257 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)] === [2024-06-28 00:40:13,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:40:13,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1200398485, now seen corresponding path program 6 times [2024-06-28 00:40:13,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:40:13,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282640408] [2024-06-28 00:40:13,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:40:13,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:40:13,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:40:17,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:40:17,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:40:17,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282640408] [2024-06-28 00:40:17,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282640408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:40:17,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:40:17,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:40:17,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428530039] [2024-06-28 00:40:17,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:40:17,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:40:17,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:40:17,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:40:17,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:40:17,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:40:17,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 446 transitions, 8126 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:17,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:40:17,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:40:17,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:40:19,964 INFO L124 PetriNetUnfolderBase]: 3845/6125 cut-off events. [2024-06-28 00:40:19,964 INFO L125 PetriNetUnfolderBase]: For 367564/367564 co-relation queries the response was YES. [2024-06-28 00:40:20,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55911 conditions, 6125 events. 3845/6125 cut-off events. For 367564/367564 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 38107 event pairs, 671 based on Foata normal form. 24/6139 useless extension candidates. Maximal degree in co-relation 55791. Up to 5450 conditions per place. [2024-06-28 00:40:20,036 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 380 selfloop transitions, 103 changer transitions 0/488 dead transitions. [2024-06-28 00:40:20,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 488 transitions, 9403 flow [2024-06-28 00:40:20,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:40:20,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:40:20,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-28 00:40:20,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 00:40:20,038 INFO L175 Difference]: Start difference. First operand has 248 places, 446 transitions, 8126 flow. Second operand 9 states and 171 transitions. [2024-06-28 00:40:20,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 488 transitions, 9403 flow [2024-06-28 00:40:20,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 488 transitions, 9077 flow, removed 70 selfloop flow, removed 7 redundant places. [2024-06-28 00:40:20,771 INFO L231 Difference]: Finished difference. Result has 250 places, 450 transitions, 8189 flow [2024-06-28 00:40:20,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7800, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8189, PETRI_PLACES=250, PETRI_TRANSITIONS=450} [2024-06-28 00:40:20,771 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-28 00:40:20,771 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 450 transitions, 8189 flow [2024-06-28 00:40:20,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:20,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:40:20,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:40:20,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 00:40:20,772 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)] === [2024-06-28 00:40:20,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:40:20,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1206827575, now seen corresponding path program 7 times [2024-06-28 00:40:20,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:40:20,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486876098] [2024-06-28 00:40:20,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:40:20,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:40:20,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:40:24,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:40:24,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:40:24,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486876098] [2024-06-28 00:40:24,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486876098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:40:24,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:40:24,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:40:24,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783734407] [2024-06-28 00:40:24,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:40:24,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:40:24,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:40:24,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:40:24,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:40:24,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:40:24,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 450 transitions, 8189 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:24,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:40:24,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:40:24,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:40:27,061 INFO L124 PetriNetUnfolderBase]: 4065/6501 cut-off events. [2024-06-28 00:40:27,061 INFO L125 PetriNetUnfolderBase]: For 398023/398023 co-relation queries the response was YES. [2024-06-28 00:40:27,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59153 conditions, 6501 events. 4065/6501 cut-off events. For 398023/398023 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 41136 event pairs, 725 based on Foata normal form. 32/6523 useless extension candidates. Maximal degree in co-relation 59032. Up to 5620 conditions per place. [2024-06-28 00:40:27,140 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 361 selfloop transitions, 130 changer transitions 0/496 dead transitions. [2024-06-28 00:40:27,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 496 transitions, 9719 flow [2024-06-28 00:40:27,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:40:27,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:40:27,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-28 00:40:27,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-28 00:40:27,142 INFO L175 Difference]: Start difference. First operand has 250 places, 450 transitions, 8189 flow. Second operand 9 states and 173 transitions. [2024-06-28 00:40:27,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 496 transitions, 9719 flow [2024-06-28 00:40:27,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 496 transitions, 9439 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-28 00:40:27,914 INFO L231 Difference]: Finished difference. Result has 252 places, 453 transitions, 8295 flow [2024-06-28 00:40:27,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7909, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8295, PETRI_PLACES=252, PETRI_TRANSITIONS=453} [2024-06-28 00:40:27,915 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-28 00:40:27,915 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 453 transitions, 8295 flow [2024-06-28 00:40:27,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:27,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:40:27,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:40:27,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 00:40:27,915 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)] === [2024-06-28 00:40:27,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:40:27,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1207064725, now seen corresponding path program 8 times [2024-06-28 00:40:27,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:40:27,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838670229] [2024-06-28 00:40:27,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:40:27,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:40:27,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:40:31,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:40:31,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:40:31,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838670229] [2024-06-28 00:40:31,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838670229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:40:31,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:40:31,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:40:31,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243207477] [2024-06-28 00:40:31,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:40:31,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:40:31,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:40:31,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:40:31,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:40:31,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:40:31,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 453 transitions, 8295 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:31,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:40:31,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:40:31,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:40:34,012 INFO L124 PetriNetUnfolderBase]: 4319/6935 cut-off events. [2024-06-28 00:40:34,012 INFO L125 PetriNetUnfolderBase]: For 419895/419895 co-relation queries the response was YES. [2024-06-28 00:40:34,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64428 conditions, 6935 events. 4319/6935 cut-off events. For 419895/419895 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 44455 event pairs, 795 based on Foata normal form. 18/6943 useless extension candidates. Maximal degree in co-relation 64306. Up to 4906 conditions per place. [2024-06-28 00:40:34,101 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 362 selfloop transitions, 140 changer transitions 0/507 dead transitions. [2024-06-28 00:40:34,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 507 transitions, 10190 flow [2024-06-28 00:40:34,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:40:34,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:40:34,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-28 00:40:34,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-28 00:40:34,102 INFO L175 Difference]: Start difference. First operand has 252 places, 453 transitions, 8295 flow. Second operand 9 states and 176 transitions. [2024-06-28 00:40:34,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 507 transitions, 10190 flow [2024-06-28 00:40:35,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 507 transitions, 9963 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-28 00:40:35,021 INFO L231 Difference]: Finished difference. Result has 256 places, 459 transitions, 8646 flow [2024-06-28 00:40:35,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8068, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8646, PETRI_PLACES=256, PETRI_TRANSITIONS=459} [2024-06-28 00:40:35,021 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-06-28 00:40:35,022 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 459 transitions, 8646 flow [2024-06-28 00:40:35,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:35,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:40:35,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:40:35,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 00:40:35,022 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)] === [2024-06-28 00:40:35,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:40:35,023 INFO L85 PathProgramCache]: Analyzing trace with hash 248740387, now seen corresponding path program 10 times [2024-06-28 00:40:35,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:40:35,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711724983] [2024-06-28 00:40:35,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:40:35,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:40:35,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:40:38,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:40:38,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:40:38,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711724983] [2024-06-28 00:40:38,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711724983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:40:38,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:40:38,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:40:38,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111221496] [2024-06-28 00:40:38,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:40:38,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:40:38,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:40:38,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:40:38,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:40:38,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:40:38,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 459 transitions, 8646 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:38,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:40:38,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:40:38,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:40:41,325 INFO L124 PetriNetUnfolderBase]: 4322/6932 cut-off events. [2024-06-28 00:40:41,325 INFO L125 PetriNetUnfolderBase]: For 418846/418846 co-relation queries the response was YES. [2024-06-28 00:40:41,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65153 conditions, 6932 events. 4322/6932 cut-off events. For 418846/418846 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 44649 event pairs, 870 based on Foata normal form. 6/6921 useless extension candidates. Maximal degree in co-relation 65029. Up to 6372 conditions per place. [2024-06-28 00:40:41,399 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 364 selfloop transitions, 124 changer transitions 0/493 dead transitions. [2024-06-28 00:40:41,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 493 transitions, 10112 flow [2024-06-28 00:40:41,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:40:41,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:40:41,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-28 00:40:41,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 00:40:41,401 INFO L175 Difference]: Start difference. First operand has 256 places, 459 transitions, 8646 flow. Second operand 8 states and 152 transitions. [2024-06-28 00:40:41,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 493 transitions, 10112 flow [2024-06-28 00:40:42,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 493 transitions, 9896 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-28 00:40:42,231 INFO L231 Difference]: Finished difference. Result has 258 places, 462 transitions, 8864 flow [2024-06-28 00:40:42,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8430, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8864, PETRI_PLACES=258, PETRI_TRANSITIONS=462} [2024-06-28 00:40:42,232 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-28 00:40:42,232 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 462 transitions, 8864 flow [2024-06-28 00:40:42,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:42,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:40:42,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:40:42,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 00:40:42,233 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)] === [2024-06-28 00:40:42,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:40:42,233 INFO L85 PathProgramCache]: Analyzing trace with hash -383007195, now seen corresponding path program 9 times [2024-06-28 00:40:42,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:40:42,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426710828] [2024-06-28 00:40:42,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:40:42,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:40:42,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:40:45,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:40:45,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:40:45,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426710828] [2024-06-28 00:40:45,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426710828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:40:45,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:40:45,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:40:45,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844797141] [2024-06-28 00:40:45,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:40:45,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:40:45,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:40:45,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:40:45,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:40:45,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:40:45,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 462 transitions, 8864 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:45,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:40:45,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:40:45,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:40:48,629 INFO L124 PetriNetUnfolderBase]: 4552/7326 cut-off events. [2024-06-28 00:40:48,629 INFO L125 PetriNetUnfolderBase]: For 494292/494292 co-relation queries the response was YES. [2024-06-28 00:40:48,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71302 conditions, 7326 events. 4552/7326 cut-off events. For 494292/494292 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 47923 event pairs, 934 based on Foata normal form. 18/7327 useless extension candidates. Maximal degree in co-relation 71176. Up to 6017 conditions per place. [2024-06-28 00:40:48,727 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 300 selfloop transitions, 208 changer transitions 0/513 dead transitions. [2024-06-28 00:40:48,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 513 transitions, 11010 flow [2024-06-28 00:40:48,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:40:48,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:40:48,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-28 00:40:48,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-28 00:40:48,728 INFO L175 Difference]: Start difference. First operand has 258 places, 462 transitions, 8864 flow. Second operand 9 states and 179 transitions. [2024-06-28 00:40:48,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 513 transitions, 11010 flow [2024-06-28 00:40:49,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 513 transitions, 10600 flow, removed 83 selfloop flow, removed 6 redundant places. [2024-06-28 00:40:49,810 INFO L231 Difference]: Finished difference. Result has 262 places, 465 transitions, 9042 flow [2024-06-28 00:40:49,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8454, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9042, PETRI_PLACES=262, PETRI_TRANSITIONS=465} [2024-06-28 00:40:49,810 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-28 00:40:49,810 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 465 transitions, 9042 flow [2024-06-28 00:40:49,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:49,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:40:49,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:40:49,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 00:40:49,811 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)] === [2024-06-28 00:40:49,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:40:49,811 INFO L85 PathProgramCache]: Analyzing trace with hash 248924837, now seen corresponding path program 10 times [2024-06-28 00:40:49,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:40:49,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636927972] [2024-06-28 00:40:49,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:40:49,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:40:49,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:40:53,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:40:53,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:40:53,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636927972] [2024-06-28 00:40:53,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636927972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:40:53,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:40:53,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:40:53,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729565792] [2024-06-28 00:40:53,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:40:53,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:40:53,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:40:53,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:40:53,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:40:53,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:40:53,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 465 transitions, 9042 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:53,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:40:53,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:40:53,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:40:56,199 INFO L124 PetriNetUnfolderBase]: 4782/7712 cut-off events. [2024-06-28 00:40:56,199 INFO L125 PetriNetUnfolderBase]: For 572250/572250 co-relation queries the response was YES. [2024-06-28 00:40:56,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77208 conditions, 7712 events. 4782/7712 cut-off events. For 572250/572250 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 51211 event pairs, 1019 based on Foata normal form. 18/7713 useless extension candidates. Maximal degree in co-relation 77080. Up to 6683 conditions per place. [2024-06-28 00:40:56,292 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 376 selfloop transitions, 135 changer transitions 0/516 dead transitions. [2024-06-28 00:40:56,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 516 transitions, 11210 flow [2024-06-28 00:40:56,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:40:56,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:40:56,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-28 00:40:56,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-28 00:40:56,294 INFO L175 Difference]: Start difference. First operand has 262 places, 465 transitions, 9042 flow. Second operand 9 states and 178 transitions. [2024-06-28 00:40:56,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 516 transitions, 11210 flow [2024-06-28 00:40:57,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 516 transitions, 11015 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-28 00:40:57,517 INFO L231 Difference]: Finished difference. Result has 268 places, 468 transitions, 9297 flow [2024-06-28 00:40:57,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8847, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9297, PETRI_PLACES=268, PETRI_TRANSITIONS=468} [2024-06-28 00:40:57,517 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-28 00:40:57,518 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 468 transitions, 9297 flow [2024-06-28 00:40:57,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:57,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:40:57,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:40:57,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 00:40:57,518 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)] === [2024-06-28 00:40:57,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:40:57,519 INFO L85 PathProgramCache]: Analyzing trace with hash 476819477, now seen corresponding path program 11 times [2024-06-28 00:40:57,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:40:57,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38875728] [2024-06-28 00:40:57,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:40:57,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:40:57,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:41:01,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:41:01,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:41:01,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38875728] [2024-06-28 00:41:01,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38875728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:41:01,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:41:01,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:41:01,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915926281] [2024-06-28 00:41:01,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:41:01,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:41:01,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:41:01,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:41:01,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:41:01,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:41:01,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 468 transitions, 9297 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 00:41:01,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:41:01,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:41:01,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:41:04,751 INFO L124 PetriNetUnfolderBase]: 4743/7656 cut-off events. [2024-06-28 00:41:04,751 INFO L125 PetriNetUnfolderBase]: For 551684/551684 co-relation queries the response was YES. [2024-06-28 00:41:04,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75835 conditions, 7656 events. 4743/7656 cut-off events. For 551684/551684 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 50761 event pairs, 1029 based on Foata normal form. 25/7664 useless extension candidates. Maximal degree in co-relation 75704. Up to 6561 conditions per place. [2024-06-28 00:41:04,847 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 298 selfloop transitions, 210 changer transitions 0/513 dead transitions. [2024-06-28 00:41:04,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 513 transitions, 11067 flow [2024-06-28 00:41:04,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:41:04,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:41:04,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-28 00:41:04,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-28 00:41:04,848 INFO L175 Difference]: Start difference. First operand has 268 places, 468 transitions, 9297 flow. Second operand 10 states and 183 transitions. [2024-06-28 00:41:04,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 513 transitions, 11067 flow [2024-06-28 00:41:06,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 513 transitions, 10859 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-28 00:41:06,056 INFO L231 Difference]: Finished difference. Result has 274 places, 471 transitions, 9621 flow [2024-06-28 00:41:06,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9089, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9621, PETRI_PLACES=274, PETRI_TRANSITIONS=471} [2024-06-28 00:41:06,057 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-28 00:41:06,057 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 471 transitions, 9621 flow [2024-06-28 00:41:06,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 00:41:06,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:41:06,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:41:06,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 00:41:06,057 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)] === [2024-06-28 00:41:06,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:41:06,058 INFO L85 PathProgramCache]: Analyzing trace with hash -97907325, now seen corresponding path program 12 times [2024-06-28 00:41:06,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:41:06,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950583972] [2024-06-28 00:41:06,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:41:06,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:41:06,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:41:09,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:41:09,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:41:09,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950583972] [2024-06-28 00:41:09,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950583972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:41:09,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:41:09,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:41:09,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131897101] [2024-06-28 00:41:09,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:41:09,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:41:09,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:41:09,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:41:09,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:41:09,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:41:09,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 471 transitions, 9621 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:09,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:41:09,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:41:09,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:41:12,664 INFO L124 PetriNetUnfolderBase]: 4816/7797 cut-off events. [2024-06-28 00:41:12,664 INFO L125 PetriNetUnfolderBase]: For 593946/593946 co-relation queries the response was YES. [2024-06-28 00:41:12,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78282 conditions, 7797 events. 4816/7797 cut-off events. For 593946/593946 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 51488 event pairs, 951 based on Foata normal form. 18/7798 useless extension candidates. Maximal degree in co-relation 78148. Up to 3413 conditions per place. [2024-06-28 00:41:12,762 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 284 selfloop transitions, 237 changer transitions 0/526 dead transitions. [2024-06-28 00:41:12,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 526 transitions, 11926 flow [2024-06-28 00:41:12,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:41:12,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:41:12,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-28 00:41:12,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452380952380952 [2024-06-28 00:41:12,764 INFO L175 Difference]: Start difference. First operand has 274 places, 471 transitions, 9621 flow. Second operand 10 states and 187 transitions. [2024-06-28 00:41:12,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 526 transitions, 11926 flow [2024-06-28 00:41:14,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 526 transitions, 11385 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-28 00:41:14,193 INFO L231 Difference]: Finished difference. Result has 279 places, 477 transitions, 9907 flow [2024-06-28 00:41:14,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9080, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9907, PETRI_PLACES=279, PETRI_TRANSITIONS=477} [2024-06-28 00:41:14,194 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-28 00:41:14,194 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 477 transitions, 9907 flow [2024-06-28 00:41:14,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:14,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:41:14,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:41:14,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 00:41:14,195 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)] === [2024-06-28 00:41:14,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:41:14,195 INFO L85 PathProgramCache]: Analyzing trace with hash 255174437, now seen corresponding path program 13 times [2024-06-28 00:41:14,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:41:14,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093062652] [2024-06-28 00:41:14,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:41:14,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:41:14,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:41:18,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:41:18,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:41:18,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093062652] [2024-06-28 00:41:18,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093062652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:41:18,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:41:18,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:41:18,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036625382] [2024-06-28 00:41:18,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:41:18,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:41:18,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:41:18,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:41:18,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:41:18,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:41:18,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 477 transitions, 9907 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:18,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:41:18,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:41:18,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:41:21,165 INFO L124 PetriNetUnfolderBase]: 4922/7959 cut-off events. [2024-06-28 00:41:21,165 INFO L125 PetriNetUnfolderBase]: For 644894/644894 co-relation queries the response was YES. [2024-06-28 00:41:21,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81548 conditions, 7959 events. 4922/7959 cut-off events. For 644894/644894 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 53326 event pairs, 1066 based on Foata normal form. 24/7966 useless extension candidates. Maximal degree in co-relation 81411. Up to 7188 conditions per place. [2024-06-28 00:41:21,273 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 379 selfloop transitions, 136 changer transitions 0/520 dead transitions. [2024-06-28 00:41:21,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 520 transitions, 11673 flow [2024-06-28 00:41:21,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:41:21,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:41:21,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-28 00:41:21,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-28 00:41:21,274 INFO L175 Difference]: Start difference. First operand has 279 places, 477 transitions, 9907 flow. Second operand 9 states and 174 transitions. [2024-06-28 00:41:21,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 520 transitions, 11673 flow [2024-06-28 00:41:22,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 520 transitions, 11348 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-28 00:41:22,732 INFO L231 Difference]: Finished difference. Result has 283 places, 479 transitions, 9998 flow [2024-06-28 00:41:22,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9582, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9998, PETRI_PLACES=283, PETRI_TRANSITIONS=479} [2024-06-28 00:41:22,732 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-28 00:41:22,732 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 479 transitions, 9998 flow [2024-06-28 00:41:22,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:22,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:41:22,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:41:22,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 00:41:22,733 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)] === [2024-06-28 00:41:22,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:41:22,733 INFO L85 PathProgramCache]: Analyzing trace with hash 248745347, now seen corresponding path program 14 times [2024-06-28 00:41:22,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:41:22,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017269646] [2024-06-28 00:41:22,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:41:22,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:41:22,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:41:26,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:41:26,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:41:26,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017269646] [2024-06-28 00:41:26,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017269646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:41:26,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:41:26,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:41:26,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650955980] [2024-06-28 00:41:26,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:41:26,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:41:26,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:41:26,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:41:26,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:41:26,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:41:26,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 479 transitions, 9998 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:26,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:41:26,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:41:26,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:41:29,748 INFO L124 PetriNetUnfolderBase]: 4932/7977 cut-off events. [2024-06-28 00:41:29,748 INFO L125 PetriNetUnfolderBase]: For 624702/624702 co-relation queries the response was YES. [2024-06-28 00:41:29,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81266 conditions, 7977 events. 4932/7977 cut-off events. For 624702/624702 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 53333 event pairs, 1068 based on Foata normal form. 24/7984 useless extension candidates. Maximal degree in co-relation 81127. Up to 7250 conditions per place. [2024-06-28 00:41:29,889 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 388 selfloop transitions, 127 changer transitions 0/520 dead transitions. [2024-06-28 00:41:29,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 520 transitions, 11568 flow [2024-06-28 00:41:29,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:41:29,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:41:29,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-28 00:41:29,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 00:41:29,890 INFO L175 Difference]: Start difference. First operand has 283 places, 479 transitions, 9998 flow. Second operand 9 states and 171 transitions. [2024-06-28 00:41:29,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 520 transitions, 11568 flow [2024-06-28 00:41:31,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 520 transitions, 11208 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-28 00:41:31,370 INFO L231 Difference]: Finished difference. Result has 285 places, 481 transitions, 10040 flow [2024-06-28 00:41:31,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9638, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10040, PETRI_PLACES=285, PETRI_TRANSITIONS=481} [2024-06-28 00:41:31,371 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-28 00:41:31,371 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 481 transitions, 10040 flow [2024-06-28 00:41:31,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:31,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:41:31,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:41:31,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 00:41:31,371 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:41:31,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:41:31,372 INFO L85 PathProgramCache]: Analyzing trace with hash 340336606, now seen corresponding path program 2 times [2024-06-28 00:41:31,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:41:31,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897656308] [2024-06-28 00:41:31,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:41:31,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:41:31,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:41:34,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:41:34,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:41:34,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897656308] [2024-06-28 00:41:34,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897656308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:41:34,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:41:34,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:41:34,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973835182] [2024-06-28 00:41:34,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:41:34,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:41:34,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:41:34,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:41:34,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:41:34,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:41:34,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 481 transitions, 10040 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:34,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:41:34,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:41:34,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:41:36,979 INFO L124 PetriNetUnfolderBase]: 4934/7988 cut-off events. [2024-06-28 00:41:36,979 INFO L125 PetriNetUnfolderBase]: For 592097/592097 co-relation queries the response was YES. [2024-06-28 00:41:37,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80843 conditions, 7988 events. 4934/7988 cut-off events. For 592097/592097 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 53625 event pairs, 1052 based on Foata normal form. 1/7979 useless extension candidates. Maximal degree in co-relation 80703. Up to 7625 conditions per place. [2024-06-28 00:41:37,095 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 426 selfloop transitions, 65 changer transitions 0/496 dead transitions. [2024-06-28 00:41:37,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 496 transitions, 11086 flow [2024-06-28 00:41:37,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:41:37,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:41:37,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-28 00:41:37,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-28 00:41:37,097 INFO L175 Difference]: Start difference. First operand has 285 places, 481 transitions, 10040 flow. Second operand 6 states and 112 transitions. [2024-06-28 00:41:37,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 496 transitions, 11086 flow [2024-06-28 00:41:38,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 496 transitions, 10738 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-28 00:41:38,753 INFO L231 Difference]: Finished difference. Result has 284 places, 481 transitions, 9866 flow [2024-06-28 00:41:38,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9631, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9866, PETRI_PLACES=284, PETRI_TRANSITIONS=481} [2024-06-28 00:41:38,754 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-28 00:41:38,754 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 481 transitions, 9866 flow [2024-06-28 00:41:38,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:38,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:41:38,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:41:38,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 00:41:38,754 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:41:38,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:41:38,755 INFO L85 PathProgramCache]: Analyzing trace with hash 456634492, now seen corresponding path program 3 times [2024-06-28 00:41:38,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:41:38,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012557170] [2024-06-28 00:41:38,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:41:38,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:41:38,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:41:41,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:41:41,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:41:41,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012557170] [2024-06-28 00:41:41,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012557170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:41:41,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:41:41,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:41:41,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100005861] [2024-06-28 00:41:41,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:41:41,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:41:41,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:41:41,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:41:41,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:41:41,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:41:41,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 481 transitions, 9866 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:41,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:41:41,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:41:41,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:41:44,744 INFO L124 PetriNetUnfolderBase]: 4882/7892 cut-off events. [2024-06-28 00:41:44,745 INFO L125 PetriNetUnfolderBase]: For 571960/571960 co-relation queries the response was YES. [2024-06-28 00:41:44,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78777 conditions, 7892 events. 4882/7892 cut-off events. For 571960/571960 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 52734 event pairs, 1054 based on Foata normal form. 1/7876 useless extension candidates. Maximal degree in co-relation 78635. Up to 7541 conditions per place. [2024-06-28 00:41:44,849 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 416 selfloop transitions, 63 changer transitions 0/484 dead transitions. [2024-06-28 00:41:44,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 484 transitions, 10680 flow [2024-06-28 00:41:44,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:41:44,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:41:44,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-28 00:41:44,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-28 00:41:44,850 INFO L175 Difference]: Start difference. First operand has 284 places, 481 transitions, 9866 flow. Second operand 6 states and 104 transitions. [2024-06-28 00:41:44,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 484 transitions, 10680 flow [2024-06-28 00:41:46,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 484 transitions, 10543 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-28 00:41:46,196 INFO L231 Difference]: Finished difference. Result has 282 places, 474 transitions, 9683 flow [2024-06-28 00:41:46,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9557, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9683, PETRI_PLACES=282, PETRI_TRANSITIONS=474} [2024-06-28 00:41:46,196 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-28 00:41:46,197 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 474 transitions, 9683 flow [2024-06-28 00:41:46,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:46,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:41:46,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:41:46,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 00:41:46,197 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:41:46,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:41:46,197 INFO L85 PathProgramCache]: Analyzing trace with hash -950382534, now seen corresponding path program 1 times [2024-06-28 00:41:46,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:41:46,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827245398] [2024-06-28 00:41:46,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:41:46,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:41:46,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:41:49,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:41:49,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:41:49,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827245398] [2024-06-28 00:41:49,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827245398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:41:49,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:41:49,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:41:49,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158247016] [2024-06-28 00:41:49,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:41:49,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:41:49,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:41:49,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:41:49,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:41:49,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 00:41:49,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 474 transitions, 9683 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:49,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:41:49,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 00:41:49,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:41:51,729 INFO L124 PetriNetUnfolderBase]: 4647/7684 cut-off events. [2024-06-28 00:41:51,729 INFO L125 PetriNetUnfolderBase]: For 589557/589568 co-relation queries the response was YES. [2024-06-28 00:41:51,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75606 conditions, 7684 events. 4647/7684 cut-off events. For 589557/589568 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 53397 event pairs, 1873 based on Foata normal form. 3/7654 useless extension candidates. Maximal degree in co-relation 75467. Up to 6702 conditions per place. [2024-06-28 00:41:51,830 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 349 selfloop transitions, 26 changer transitions 0/496 dead transitions. [2024-06-28 00:41:51,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 496 transitions, 10743 flow [2024-06-28 00:41:51,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:41:51,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:41:51,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-28 00:41:51,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-28 00:41:51,832 INFO L175 Difference]: Start difference. First operand has 282 places, 474 transitions, 9683 flow. Second operand 7 states and 120 transitions. [2024-06-28 00:41:51,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 496 transitions, 10743 flow [2024-06-28 00:41:53,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 496 transitions, 10661 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 00:41:53,170 INFO L231 Difference]: Finished difference. Result has 286 places, 480 transitions, 9797 flow [2024-06-28 00:41:53,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9601, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9797, PETRI_PLACES=286, PETRI_TRANSITIONS=480} [2024-06-28 00:41:53,171 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-28 00:41:53,171 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 480 transitions, 9797 flow [2024-06-28 00:41:53,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:53,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:41:53,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:41:53,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 00:41:53,172 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:41:53,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:41:53,172 INFO L85 PathProgramCache]: Analyzing trace with hash -126476437, now seen corresponding path program 1 times [2024-06-28 00:41:53,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:41:53,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992086410] [2024-06-28 00:41:53,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:41:53,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:41:53,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:41:57,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:41:57,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:41:57,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992086410] [2024-06-28 00:41:57,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992086410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:41:57,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:41:57,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:41:57,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107247779] [2024-06-28 00:41:57,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:41:57,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:41:57,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:41:57,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:41:57,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:41:57,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:41:57,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 480 transitions, 9797 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:57,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:41:57,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:41:57,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:42:00,220 INFO L124 PetriNetUnfolderBase]: 4941/7990 cut-off events. [2024-06-28 00:42:00,220 INFO L125 PetriNetUnfolderBase]: For 599086/599086 co-relation queries the response was YES. [2024-06-28 00:42:00,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79934 conditions, 7990 events. 4941/7990 cut-off events. For 599086/599086 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 53588 event pairs, 1041 based on Foata normal form. 4/7984 useless extension candidates. Maximal degree in co-relation 79793. Up to 7539 conditions per place. [2024-06-28 00:42:00,309 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 436 selfloop transitions, 74 changer transitions 0/515 dead transitions. [2024-06-28 00:42:00,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 515 transitions, 11411 flow [2024-06-28 00:42:00,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:42:00,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:42:00,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-28 00:42:00,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-28 00:42:00,311 INFO L175 Difference]: Start difference. First operand has 286 places, 480 transitions, 9797 flow. Second operand 9 states and 156 transitions. [2024-06-28 00:42:00,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 515 transitions, 11411 flow [2024-06-28 00:42:01,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 515 transitions, 11360 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-28 00:42:01,677 INFO L231 Difference]: Finished difference. Result has 292 places, 489 transitions, 10036 flow [2024-06-28 00:42:01,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9746, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10036, PETRI_PLACES=292, PETRI_TRANSITIONS=489} [2024-06-28 00:42:01,678 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-28 00:42:01,678 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 489 transitions, 10036 flow [2024-06-28 00:42:01,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:01,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:42:01,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:42:01,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 00:42:01,678 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)] === [2024-06-28 00:42:01,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:42:01,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1307524235, now seen corresponding path program 1 times [2024-06-28 00:42:01,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:42:01,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664329093] [2024-06-28 00:42:01,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:42:01,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:42:01,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:42:04,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:42:04,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:42:04,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664329093] [2024-06-28 00:42:04,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664329093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:42:04,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:42:04,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:42:04,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502203777] [2024-06-28 00:42:04,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:42:04,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:42:04,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:42:04,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:42:04,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:42:04,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:42:04,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 489 transitions, 10036 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:04,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:42:04,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:42:04,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:42:08,115 INFO L124 PetriNetUnfolderBase]: 5009/8107 cut-off events. [2024-06-28 00:42:08,115 INFO L125 PetriNetUnfolderBase]: For 665044/665044 co-relation queries the response was YES. [2024-06-28 00:42:08,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82051 conditions, 8107 events. 5009/8107 cut-off events. For 665044/665044 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 54802 event pairs, 1006 based on Foata normal form. 18/8123 useless extension candidates. Maximal degree in co-relation 81909. Up to 7407 conditions per place. [2024-06-28 00:42:08,207 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 452 selfloop transitions, 84 changer transitions 0/541 dead transitions. [2024-06-28 00:42:08,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 541 transitions, 11411 flow [2024-06-28 00:42:08,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:42:08,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:42:08,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-28 00:42:08,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-28 00:42:08,208 INFO L175 Difference]: Start difference. First operand has 292 places, 489 transitions, 10036 flow. Second operand 10 states and 189 transitions. [2024-06-28 00:42:08,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 541 transitions, 11411 flow [2024-06-28 00:42:09,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 541 transitions, 11251 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-28 00:42:09,581 INFO L231 Difference]: Finished difference. Result has 296 places, 491 transitions, 10196 flow [2024-06-28 00:42:09,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9876, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10196, PETRI_PLACES=296, PETRI_TRANSITIONS=491} [2024-06-28 00:42:09,581 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-28 00:42:09,581 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 491 transitions, 10196 flow [2024-06-28 00:42:09,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:09,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:42:09,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:42:09,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 00:42:09,582 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:42:09,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:42:09,582 INFO L85 PathProgramCache]: Analyzing trace with hash -927105795, now seen corresponding path program 2 times [2024-06-28 00:42:09,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:42:09,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144627534] [2024-06-28 00:42:09,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:42:09,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:42:09,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:42:14,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:42:14,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:42:14,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144627534] [2024-06-28 00:42:14,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144627534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:42:14,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:42:14,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:42:14,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155249357] [2024-06-28 00:42:14,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:42:14,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:42:14,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:42:14,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:42:14,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:42:14,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:42:14,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 491 transitions, 10196 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:14,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:42:14,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:42:14,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:42:17,021 INFO L124 PetriNetUnfolderBase]: 5077/8225 cut-off events. [2024-06-28 00:42:17,021 INFO L125 PetriNetUnfolderBase]: For 687498/687498 co-relation queries the response was YES. [2024-06-28 00:42:17,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83866 conditions, 8225 events. 5077/8225 cut-off events. For 687498/687498 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 55642 event pairs, 1105 based on Foata normal form. 18/8241 useless extension candidates. Maximal degree in co-relation 83724. Up to 7621 conditions per place. [2024-06-28 00:42:17,124 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 451 selfloop transitions, 84 changer transitions 0/540 dead transitions. [2024-06-28 00:42:17,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 540 transitions, 11562 flow [2024-06-28 00:42:17,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:42:17,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:42:17,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-28 00:42:17,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452380952380952 [2024-06-28 00:42:17,125 INFO L175 Difference]: Start difference. First operand has 296 places, 491 transitions, 10196 flow. Second operand 10 states and 187 transitions. [2024-06-28 00:42:17,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 540 transitions, 11562 flow [2024-06-28 00:42:18,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 540 transitions, 11284 flow, removed 58 selfloop flow, removed 8 redundant places. [2024-06-28 00:42:18,643 INFO L231 Difference]: Finished difference. Result has 298 places, 493 transitions, 10241 flow [2024-06-28 00:42:18,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9918, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10241, PETRI_PLACES=298, PETRI_TRANSITIONS=493} [2024-06-28 00:42:18,644 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 255 predicate places. [2024-06-28 00:42:18,644 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 493 transitions, 10241 flow [2024-06-28 00:42:18,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:18,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:42:18,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:42:18,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 00:42:18,645 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)] === [2024-06-28 00:42:18,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:42:18,645 INFO L85 PathProgramCache]: Analyzing trace with hash 629492303, now seen corresponding path program 3 times [2024-06-28 00:42:18,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:42:18,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611582712] [2024-06-28 00:42:18,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:42:18,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:42:18,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:42:22,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:42:22,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:42:22,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611582712] [2024-06-28 00:42:22,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611582712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:42:22,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:42:22,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:42:22,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855697625] [2024-06-28 00:42:22,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:42:22,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:42:22,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:42:22,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:42:22,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:42:22,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:42:22,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 493 transitions, 10241 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:22,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:42:22,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:42:22,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:42:25,277 INFO L124 PetriNetUnfolderBase]: 5152/8348 cut-off events. [2024-06-28 00:42:25,277 INFO L125 PetriNetUnfolderBase]: For 722457/722457 co-relation queries the response was YES. [2024-06-28 00:42:25,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85057 conditions, 8348 events. 5152/8348 cut-off events. For 722457/722457 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 56612 event pairs, 1095 based on Foata normal form. 18/8363 useless extension candidates. Maximal degree in co-relation 84914. Up to 7697 conditions per place. [2024-06-28 00:42:25,380 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 432 selfloop transitions, 105 changer transitions 0/542 dead transitions. [2024-06-28 00:42:25,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 542 transitions, 11753 flow [2024-06-28 00:42:25,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:42:25,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:42:25,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-28 00:42:25,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452380952380952 [2024-06-28 00:42:25,381 INFO L175 Difference]: Start difference. First operand has 298 places, 493 transitions, 10241 flow. Second operand 10 states and 187 transitions. [2024-06-28 00:42:25,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 542 transitions, 11753 flow [2024-06-28 00:42:27,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 542 transitions, 11470 flow, removed 60 selfloop flow, removed 8 redundant places. [2024-06-28 00:42:27,283 INFO L231 Difference]: Finished difference. Result has 300 places, 495 transitions, 10326 flow [2024-06-28 00:42:27,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9958, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10326, PETRI_PLACES=300, PETRI_TRANSITIONS=495} [2024-06-28 00:42:27,283 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-28 00:42:27,283 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 495 transitions, 10326 flow [2024-06-28 00:42:27,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:27,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:42:27,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:42:27,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 00:42:27,284 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)] === [2024-06-28 00:42:27,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:42:27,284 INFO L85 PathProgramCache]: Analyzing trace with hash -914179779, now seen corresponding path program 4 times [2024-06-28 00:42:27,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:42:27,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52585792] [2024-06-28 00:42:27,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:42:27,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:42:27,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:42:30,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:42:30,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:42:30,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52585792] [2024-06-28 00:42:30,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52585792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:42:30,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:42:30,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:42:30,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727827937] [2024-06-28 00:42:30,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:42:30,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:42:30,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:42:30,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:42:30,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:42:30,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:42:30,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 495 transitions, 10326 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:30,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:42:30,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:42:30,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:42:33,319 INFO L124 PetriNetUnfolderBase]: 5274/8562 cut-off events. [2024-06-28 00:42:33,319 INFO L125 PetriNetUnfolderBase]: For 746632/746632 co-relation queries the response was YES. [2024-06-28 00:42:33,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86598 conditions, 8562 events. 5274/8562 cut-off events. For 746632/746632 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 58399 event pairs, 1285 based on Foata normal form. 18/8578 useless extension candidates. Maximal degree in co-relation 86454. Up to 7828 conditions per place. [2024-06-28 00:42:33,437 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 461 selfloop transitions, 86 changer transitions 0/552 dead transitions. [2024-06-28 00:42:33,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 552 transitions, 11772 flow [2024-06-28 00:42:33,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:42:33,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:42:33,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-28 00:42:33,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-28 00:42:33,438 INFO L175 Difference]: Start difference. First operand has 300 places, 495 transitions, 10326 flow. Second operand 10 states and 189 transitions. [2024-06-28 00:42:33,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 552 transitions, 11772 flow [2024-06-28 00:42:35,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 552 transitions, 11442 flow, removed 62 selfloop flow, removed 8 redundant places. [2024-06-28 00:42:35,365 INFO L231 Difference]: Finished difference. Result has 302 places, 499 transitions, 10363 flow [2024-06-28 00:42:35,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9996, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10363, PETRI_PLACES=302, PETRI_TRANSITIONS=499} [2024-06-28 00:42:35,366 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-28 00:42:35,366 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 499 transitions, 10363 flow [2024-06-28 00:42:35,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:35,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:42:35,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:42:35,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 00:42:35,366 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)] === [2024-06-28 00:42:35,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:42:35,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1636123137, now seen corresponding path program 5 times [2024-06-28 00:42:35,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:42:35,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897013881] [2024-06-28 00:42:35,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:42:35,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:42:35,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:42:38,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:42:38,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:42:38,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897013881] [2024-06-28 00:42:38,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897013881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:42:38,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:42:38,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:42:38,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835031158] [2024-06-28 00:42:38,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:42:38,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:42:38,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:42:38,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:42:38,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:42:38,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:42:38,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 499 transitions, 10363 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:38,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:42:38,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:42:38,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:42:41,461 INFO L124 PetriNetUnfolderBase]: 5396/8774 cut-off events. [2024-06-28 00:42:41,461 INFO L125 PetriNetUnfolderBase]: For 766272/766272 co-relation queries the response was YES. [2024-06-28 00:42:41,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87886 conditions, 8774 events. 5396/8774 cut-off events. For 766272/766272 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 60139 event pairs, 1407 based on Foata normal form. 18/8790 useless extension candidates. Maximal degree in co-relation 87741. Up to 8096 conditions per place. [2024-06-28 00:42:41,579 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 459 selfloop transitions, 89 changer transitions 0/553 dead transitions. [2024-06-28 00:42:41,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 553 transitions, 11807 flow [2024-06-28 00:42:41,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:42:41,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:42:41,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-28 00:42:41,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452380952380952 [2024-06-28 00:42:41,580 INFO L175 Difference]: Start difference. First operand has 302 places, 499 transitions, 10363 flow. Second operand 10 states and 187 transitions. [2024-06-28 00:42:41,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 553 transitions, 11807 flow [2024-06-28 00:42:43,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 553 transitions, 11518 flow, removed 62 selfloop flow, removed 8 redundant places. [2024-06-28 00:42:43,607 INFO L231 Difference]: Finished difference. Result has 304 places, 503 transitions, 10451 flow [2024-06-28 00:42:43,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10074, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10451, PETRI_PLACES=304, PETRI_TRANSITIONS=503} [2024-06-28 00:42:43,608 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-28 00:42:43,608 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 503 transitions, 10451 flow [2024-06-28 00:42:43,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:43,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:42:43,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:42:43,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 00:42:43,608 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)] === [2024-06-28 00:42:43,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:42:43,609 INFO L85 PathProgramCache]: Analyzing trace with hash -36008511, now seen corresponding path program 6 times [2024-06-28 00:42:43,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:42:43,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153149735] [2024-06-28 00:42:43,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:42:43,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:42:43,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:42:46,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:42:46,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:42:46,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153149735] [2024-06-28 00:42:46,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153149735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:42:46,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:42:46,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:42:46,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209229428] [2024-06-28 00:42:46,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:42:46,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:42:46,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:42:46,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:42:46,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:42:46,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:42:46,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 503 transitions, 10451 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:46,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:42:46,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:42:46,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:42:49,069 INFO L124 PetriNetUnfolderBase]: 4394/7693 cut-off events. [2024-06-28 00:42:49,069 INFO L125 PetriNetUnfolderBase]: For 789735/789799 co-relation queries the response was YES. [2024-06-28 00:42:49,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81495 conditions, 7693 events. 4394/7693 cut-off events. For 789735/789799 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 57159 event pairs, 698 based on Foata normal form. 54/7545 useless extension candidates. Maximal degree in co-relation 81349. Up to 5136 conditions per place. [2024-06-28 00:42:49,175 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 319 selfloop transitions, 127 changer transitions 0/552 dead transitions. [2024-06-28 00:42:49,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 552 transitions, 11757 flow [2024-06-28 00:42:49,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:42:49,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:42:49,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-28 00:42:49,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 00:42:49,177 INFO L175 Difference]: Start difference. First operand has 304 places, 503 transitions, 10451 flow. Second operand 9 states and 189 transitions. [2024-06-28 00:42:49,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 552 transitions, 11757 flow [2024-06-28 00:42:51,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 552 transitions, 11458 flow, removed 64 selfloop flow, removed 8 redundant places. [2024-06-28 00:42:51,178 INFO L231 Difference]: Finished difference. Result has 305 places, 506 transitions, 10627 flow [2024-06-28 00:42:51,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10152, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10627, PETRI_PLACES=305, PETRI_TRANSITIONS=506} [2024-06-28 00:42:51,178 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-28 00:42:51,178 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 506 transitions, 10627 flow [2024-06-28 00:42:51,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:51,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:42:51,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:42:51,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 00:42:51,179 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)] === [2024-06-28 00:42:51,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:42:51,179 INFO L85 PathProgramCache]: Analyzing trace with hash -449550641, now seen corresponding path program 2 times [2024-06-28 00:42:51,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:42:51,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87167469] [2024-06-28 00:42:51,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:42:51,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:42:51,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:42:54,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:42:54,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:42:54,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87167469] [2024-06-28 00:42:54,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87167469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:42:54,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:42:54,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:42:54,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601201169] [2024-06-28 00:42:54,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:42:54,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:42:54,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:42:54,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:42:54,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:42:54,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:42:54,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 506 transitions, 10627 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:54,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:42:54,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:42:54,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:42:57,810 INFO L124 PetriNetUnfolderBase]: 5506/8946 cut-off events. [2024-06-28 00:42:57,810 INFO L125 PetriNetUnfolderBase]: For 755126/755126 co-relation queries the response was YES. [2024-06-28 00:42:57,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89326 conditions, 8946 events. 5506/8946 cut-off events. For 755126/755126 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 61407 event pairs, 1286 based on Foata normal form. 4/8947 useless extension candidates. Maximal degree in co-relation 89179. Up to 8544 conditions per place. [2024-06-28 00:42:57,933 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 462 selfloop transitions, 68 changer transitions 0/535 dead transitions. [2024-06-28 00:42:57,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 535 transitions, 11830 flow [2024-06-28 00:42:57,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:42:57,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:42:57,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-28 00:42:57,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 00:42:57,934 INFO L175 Difference]: Start difference. First operand has 305 places, 506 transitions, 10627 flow. Second operand 7 states and 133 transitions. [2024-06-28 00:42:57,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 535 transitions, 11830 flow [2024-06-28 00:43:00,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 535 transitions, 11495 flow, removed 58 selfloop flow, removed 7 redundant places. [2024-06-28 00:43:00,531 INFO L231 Difference]: Finished difference. Result has 305 places, 509 transitions, 10472 flow [2024-06-28 00:43:00,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10292, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10472, PETRI_PLACES=305, PETRI_TRANSITIONS=509} [2024-06-28 00:43:00,532 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-28 00:43:00,532 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 509 transitions, 10472 flow [2024-06-28 00:43:00,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:43:00,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:43:00,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:43:00,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 00:43:00,533 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:43:00,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:43:00,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1692499619, now seen corresponding path program 7 times [2024-06-28 00:43:00,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:43:00,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669015445] [2024-06-28 00:43:00,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:43:00,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:43:00,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:43:03,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:43:03,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:43:03,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669015445] [2024-06-28 00:43:03,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669015445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:43:03,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:43:03,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:43:03,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918155881] [2024-06-28 00:43:03,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:43:03,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:43:03,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:43:03,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:43:03,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:43:03,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:43:03,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 509 transitions, 10472 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:43:03,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:43:03,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:43:03,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:43:07,241 INFO L124 PetriNetUnfolderBase]: 5716/9301 cut-off events. [2024-06-28 00:43:07,241 INFO L125 PetriNetUnfolderBase]: For 806396/806396 co-relation queries the response was YES. [2024-06-28 00:43:07,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91277 conditions, 9301 events. 5716/9301 cut-off events. For 806396/806396 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 64049 event pairs, 1305 based on Foata normal form. 18/9309 useless extension candidates. Maximal degree in co-relation 91130. Up to 8424 conditions per place. [2024-06-28 00:43:07,355 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 465 selfloop transitions, 88 changer transitions 0/558 dead transitions. [2024-06-28 00:43:07,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 558 transitions, 11985 flow [2024-06-28 00:43:07,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:43:07,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:43:07,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-28 00:43:07,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261904761904762 [2024-06-28 00:43:07,356 INFO L175 Difference]: Start difference. First operand has 305 places, 509 transitions, 10472 flow. Second operand 10 states and 179 transitions. [2024-06-28 00:43:07,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 558 transitions, 11985 flow [2024-06-28 00:43:09,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 558 transitions, 11877 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-28 00:43:09,438 INFO L231 Difference]: Finished difference. Result has 311 places, 516 transitions, 10835 flow [2024-06-28 00:43:09,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10364, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10835, PETRI_PLACES=311, PETRI_TRANSITIONS=516} [2024-06-28 00:43:09,439 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-28 00:43:09,439 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 516 transitions, 10835 flow [2024-06-28 00:43:09,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:43:09,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:43:09,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:43:09,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 00:43:09,439 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)] === [2024-06-28 00:43:09,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:43:09,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1603933859, now seen corresponding path program 8 times [2024-06-28 00:43:09,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:43:09,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189155854] [2024-06-28 00:43:09,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:43:09,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:43:09,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:43:12,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:43:12,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:43:12,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189155854] [2024-06-28 00:43:12,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189155854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:43:12,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:43:12,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:43:12,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921647172] [2024-06-28 00:43:12,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:43:12,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:43:12,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:43:12,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:43:12,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:43:12,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:43:12,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 516 transitions, 10835 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:43:12,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:43:12,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:43:12,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:43:16,351 INFO L124 PetriNetUnfolderBase]: 5892/9599 cut-off events. [2024-06-28 00:43:16,351 INFO L125 PetriNetUnfolderBase]: For 850096/850096 co-relation queries the response was YES. [2024-06-28 00:43:16,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94330 conditions, 9599 events. 5892/9599 cut-off events. For 850096/850096 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 66482 event pairs, 1449 based on Foata normal form. 18/9607 useless extension candidates. Maximal degree in co-relation 94181. Up to 8864 conditions per place. [2024-06-28 00:43:16,477 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 469 selfloop transitions, 87 changer transitions 0/561 dead transitions. [2024-06-28 00:43:16,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 561 transitions, 12307 flow [2024-06-28 00:43:16,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:43:16,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:43:16,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-28 00:43:16,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-28 00:43:16,478 INFO L175 Difference]: Start difference. First operand has 311 places, 516 transitions, 10835 flow. Second operand 10 states and 177 transitions. [2024-06-28 00:43:16,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 561 transitions, 12307 flow [2024-06-28 00:43:19,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 561 transitions, 11996 flow, removed 73 selfloop flow, removed 8 redundant places. [2024-06-28 00:43:19,093 INFO L231 Difference]: Finished difference. Result has 313 places, 522 transitions, 10953 flow [2024-06-28 00:43:19,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10524, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10953, PETRI_PLACES=313, PETRI_TRANSITIONS=522} [2024-06-28 00:43:19,093 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-28 00:43:19,093 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 522 transitions, 10953 flow [2024-06-28 00:43:19,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:43:19,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:43:19,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:43:19,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 00:43:19,094 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)] === [2024-06-28 00:43:19,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:43:19,094 INFO L85 PathProgramCache]: Analyzing trace with hash 61154605, now seen corresponding path program 9 times [2024-06-28 00:43:19,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:43:19,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122192645] [2024-06-28 00:43:19,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:43:19,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:43:19,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:43:22,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:43:22,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:43:22,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122192645] [2024-06-28 00:43:22,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122192645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:43:22,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:43:22,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:43:22,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251235702] [2024-06-28 00:43:22,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:43:22,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:43:22,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:43:22,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:43:22,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:43:22,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:43:22,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 522 transitions, 10953 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:43:22,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:43:22,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:43:22,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:43:26,007 INFO L124 PetriNetUnfolderBase]: 6014/9799 cut-off events. [2024-06-28 00:43:26,007 INFO L125 PetriNetUnfolderBase]: For 874954/874954 co-relation queries the response was YES. [2024-06-28 00:43:26,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95779 conditions, 9799 events. 6014/9799 cut-off events. For 874954/874954 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 68152 event pairs, 1435 based on Foata normal form. 18/9807 useless extension candidates. Maximal degree in co-relation 95629. Up to 9118 conditions per place. [2024-06-28 00:43:26,139 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 462 selfloop transitions, 97 changer transitions 0/564 dead transitions. [2024-06-28 00:43:26,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 564 transitions, 12397 flow [2024-06-28 00:43:26,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:43:26,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:43:26,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-28 00:43:26,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-28 00:43:26,140 INFO L175 Difference]: Start difference. First operand has 313 places, 522 transitions, 10953 flow. Second operand 9 states and 169 transitions. [2024-06-28 00:43:26,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 564 transitions, 12397 flow [2024-06-28 00:43:28,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 564 transitions, 12100 flow, removed 66 selfloop flow, removed 8 redundant places. [2024-06-28 00:43:28,789 INFO L231 Difference]: Finished difference. Result has 314 places, 526 transitions, 11064 flow [2024-06-28 00:43:28,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10656, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11064, PETRI_PLACES=314, PETRI_TRANSITIONS=526} [2024-06-28 00:43:28,789 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-28 00:43:28,789 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 526 transitions, 11064 flow [2024-06-28 00:43:28,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:43:28,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:43:28,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:43:28,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 00:43:28,790 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)] === [2024-06-28 00:43:28,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:43:28,790 INFO L85 PathProgramCache]: Analyzing trace with hash 477259965, now seen corresponding path program 10 times [2024-06-28 00:43:28,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:43:28,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103728929] [2024-06-28 00:43:28,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:43:28,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:43:28,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:43:32,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:43:32,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:43:32,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103728929] [2024-06-28 00:43:32,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103728929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:43:32,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:43:32,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:43:32,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127618203] [2024-06-28 00:43:32,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:43:32,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:43:32,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:43:32,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:43:32,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:43:32,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:43:32,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 526 transitions, 11064 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:43:32,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:43:32,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:43:32,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:43:36,062 INFO L124 PetriNetUnfolderBase]: 6021/9804 cut-off events. [2024-06-28 00:43:36,062 INFO L125 PetriNetUnfolderBase]: For 862630/862630 co-relation queries the response was YES. [2024-06-28 00:43:36,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95024 conditions, 9804 events. 6021/9804 cut-off events. For 862630/862630 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 68074 event pairs, 1459 based on Foata normal form. 18/9805 useless extension candidates. Maximal degree in co-relation 94873. Up to 9106 conditions per place. [2024-06-28 00:43:36,184 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 439 selfloop transitions, 122 changer transitions 0/566 dead transitions. [2024-06-28 00:43:36,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 566 transitions, 12660 flow [2024-06-28 00:43:36,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:43:36,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:43:36,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-28 00:43:36,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-28 00:43:36,185 INFO L175 Difference]: Start difference. First operand has 314 places, 526 transitions, 11064 flow. Second operand 10 states and 176 transitions. [2024-06-28 00:43:36,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 566 transitions, 12660 flow [2024-06-28 00:43:38,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 566 transitions, 12328 flow, removed 72 selfloop flow, removed 7 redundant places. [2024-06-28 00:43:38,251 INFO L231 Difference]: Finished difference. Result has 316 places, 527 transitions, 11021 flow [2024-06-28 00:43:38,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10594, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11021, PETRI_PLACES=316, PETRI_TRANSITIONS=527} [2024-06-28 00:43:38,252 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-28 00:43:38,252 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 527 transitions, 11021 flow [2024-06-28 00:43:38,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:43:38,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:43:38,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:43:38,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 00:43:38,252 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:43:38,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:43:38,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1270769513, now seen corresponding path program 3 times [2024-06-28 00:43:38,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:43:38,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554340879] [2024-06-28 00:43:38,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:43:38,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:43:38,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:43:42,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:43:42,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:43:42,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554340879] [2024-06-28 00:43:42,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554340879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:43:42,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:43:42,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:43:42,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320668771] [2024-06-28 00:43:42,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:43:42,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:43:42,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:43:42,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:43:42,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:43:42,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:43:42,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 527 transitions, 11021 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:43:42,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:43:42,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:43:42,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:43:46,578 INFO L124 PetriNetUnfolderBase]: 6051/9872 cut-off events. [2024-06-28 00:43:46,578 INFO L125 PetriNetUnfolderBase]: For 831026/831026 co-relation queries the response was YES. [2024-06-28 00:43:46,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95014 conditions, 9872 events. 6051/9872 cut-off events. For 831026/831026 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 68882 event pairs, 1864 based on Foata normal form. 4/9868 useless extension candidates. Maximal degree in co-relation 94862. Up to 9409 conditions per place. [2024-06-28 00:43:46,722 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 475 selfloop transitions, 79 changer transitions 0/559 dead transitions. [2024-06-28 00:43:46,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 559 transitions, 12559 flow [2024-06-28 00:43:46,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:43:46,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:43:46,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 171 transitions. [2024-06-28 00:43:46,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37012987012987014 [2024-06-28 00:43:46,723 INFO L175 Difference]: Start difference. First operand has 316 places, 527 transitions, 11021 flow. Second operand 11 states and 171 transitions. [2024-06-28 00:43:46,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 559 transitions, 12559 flow [2024-06-28 00:43:48,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 559 transitions, 12166 flow, removed 76 selfloop flow, removed 8 redundant places. [2024-06-28 00:43:48,938 INFO L231 Difference]: Finished difference. Result has 320 places, 533 transitions, 10890 flow [2024-06-28 00:43:48,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10628, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10890, PETRI_PLACES=320, PETRI_TRANSITIONS=533} [2024-06-28 00:43:48,938 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-28 00:43:48,938 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 533 transitions, 10890 flow [2024-06-28 00:43:48,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:43:48,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:43:48,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:43:48,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 00:43:48,939 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:43:48,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:43:48,939 INFO L85 PathProgramCache]: Analyzing trace with hash -114096277, now seen corresponding path program 4 times [2024-06-28 00:43:48,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:43:48,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557385744] [2024-06-28 00:43:48,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:43:48,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:43:48,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:43:53,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:43:53,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:43:53,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557385744] [2024-06-28 00:43:53,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557385744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:43:53,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:43:53,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:43:53,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413583598] [2024-06-28 00:43:53,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:43:53,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:43:53,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:43:53,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:43:53,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:43:53,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:43:53,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 533 transitions, 10890 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:43:53,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:43:53,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:43:53,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:43:56,592 INFO L124 PetriNetUnfolderBase]: 6039/9859 cut-off events. [2024-06-28 00:43:56,592 INFO L125 PetriNetUnfolderBase]: For 810629/810629 co-relation queries the response was YES. [2024-06-28 00:43:56,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93534 conditions, 9859 events. 6039/9859 cut-off events. For 810629/810629 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 69246 event pairs, 2673 based on Foata normal form. 4/9861 useless extension candidates. Maximal degree in co-relation 93380. Up to 9571 conditions per place. [2024-06-28 00:43:56,713 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 518 selfloop transitions, 22 changer transitions 0/545 dead transitions. [2024-06-28 00:43:56,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 545 transitions, 12050 flow [2024-06-28 00:43:56,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:43:56,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:43:56,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-28 00:43:56,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3707482993197279 [2024-06-28 00:43:56,714 INFO L175 Difference]: Start difference. First operand has 320 places, 533 transitions, 10890 flow. Second operand 7 states and 109 transitions. [2024-06-28 00:43:56,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 545 transitions, 12050 flow [2024-06-28 00:43:58,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 545 transitions, 11881 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-28 00:43:58,832 INFO L231 Difference]: Finished difference. Result has 319 places, 533 transitions, 10778 flow [2024-06-28 00:43:58,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10721, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10778, PETRI_PLACES=319, PETRI_TRANSITIONS=533} [2024-06-28 00:43:58,833 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-28 00:43:58,833 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 533 transitions, 10778 flow [2024-06-28 00:43:58,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:43:58,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:43:58,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:43:58,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 00:43:58,833 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:43:58,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:43:58,833 INFO L85 PathProgramCache]: Analyzing trace with hash 602824302, now seen corresponding path program 1 times [2024-06-28 00:43:58,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:43:58,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726460333] [2024-06-28 00:43:58,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:43:58,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:43:58,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:44:02,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:44:02,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:44:02,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726460333] [2024-06-28 00:44:02,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726460333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:44:02,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:44:02,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:44:02,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395276736] [2024-06-28 00:44:02,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:44:02,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:44:02,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:44:02,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:44:02,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:44:02,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:44:02,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 533 transitions, 10778 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:44:02,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:44:02,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:44:02,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:44:05,420 INFO L124 PetriNetUnfolderBase]: 6052/9876 cut-off events. [2024-06-28 00:44:05,420 INFO L125 PetriNetUnfolderBase]: For 816016/816016 co-relation queries the response was YES. [2024-06-28 00:44:05,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93680 conditions, 9876 events. 6052/9876 cut-off events. For 816016/816016 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 69341 event pairs, 2673 based on Foata normal form. 1/9874 useless extension candidates. Maximal degree in co-relation 93526. Up to 9555 conditions per place. [2024-06-28 00:44:05,551 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 517 selfloop transitions, 42 changer transitions 0/564 dead transitions. [2024-06-28 00:44:05,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 564 transitions, 12470 flow [2024-06-28 00:44:05,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:44:05,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:44:05,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-28 00:44:05,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-28 00:44:05,553 INFO L175 Difference]: Start difference. First operand has 319 places, 533 transitions, 10778 flow. Second operand 7 states and 127 transitions. [2024-06-28 00:44:05,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 564 transitions, 12470 flow [2024-06-28 00:44:08,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 564 transitions, 12424 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 00:44:08,280 INFO L231 Difference]: Finished difference. Result has 322 places, 542 transitions, 11061 flow [2024-06-28 00:44:08,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10732, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11061, PETRI_PLACES=322, PETRI_TRANSITIONS=542} [2024-06-28 00:44:08,281 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-28 00:44:08,281 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 542 transitions, 11061 flow [2024-06-28 00:44:08,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:44:08,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:44:08,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:44:08,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 00:44:08,281 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:44:08,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:44:08,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1489706192, now seen corresponding path program 2 times [2024-06-28 00:44:08,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:44:08,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124568875] [2024-06-28 00:44:08,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:44:08,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:44:08,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:44:12,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:44:12,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:44:12,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124568875] [2024-06-28 00:44:12,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124568875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:44:12,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:44:12,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:44:12,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628493480] [2024-06-28 00:44:12,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:44:12,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:44:12,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:44:12,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:44:12,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:44:12,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:44:12,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 542 transitions, 11061 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:44:12,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:44:12,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:44:12,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:44:15,514 INFO L124 PetriNetUnfolderBase]: 6049/9872 cut-off events. [2024-06-28 00:44:15,514 INFO L125 PetriNetUnfolderBase]: For 833346/833346 co-relation queries the response was YES. [2024-06-28 00:44:15,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94678 conditions, 9872 events. 6049/9872 cut-off events. For 833346/833346 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 69280 event pairs, 2674 based on Foata normal form. 1/9870 useless extension candidates. Maximal degree in co-relation 94522. Up to 9583 conditions per place. [2024-06-28 00:44:15,656 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 531 selfloop transitions, 28 changer transitions 0/564 dead transitions. [2024-06-28 00:44:15,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 564 transitions, 12617 flow [2024-06-28 00:44:15,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:44:15,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:44:15,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-28 00:44:15,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-28 00:44:15,658 INFO L175 Difference]: Start difference. First operand has 322 places, 542 transitions, 11061 flow. Second operand 7 states and 118 transitions. [2024-06-28 00:44:15,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 564 transitions, 12617 flow [2024-06-28 00:44:18,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 564 transitions, 12252 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-28 00:44:18,187 INFO L231 Difference]: Finished difference. Result has 325 places, 548 transitions, 11004 flow [2024-06-28 00:44:18,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10696, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11004, PETRI_PLACES=325, PETRI_TRANSITIONS=548} [2024-06-28 00:44:18,188 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-28 00:44:18,188 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 548 transitions, 11004 flow [2024-06-28 00:44:18,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:44:18,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:44:18,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:44:18,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 00:44:18,188 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:44:18,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:44:18,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1271200103, now seen corresponding path program 1 times [2024-06-28 00:44:18,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:44:18,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032365844] [2024-06-28 00:44:18,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:44:18,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:44:18,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:44:23,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:44:23,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:44:23,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032365844] [2024-06-28 00:44:23,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032365844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:44:23,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:44:23,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:44:23,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865194475] [2024-06-28 00:44:23,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:44:23,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:44:23,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:44:23,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:44:23,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:44:23,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:44:23,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 548 transitions, 11004 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:44:23,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:44:23,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:44:23,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:44:26,768 INFO L124 PetriNetUnfolderBase]: 6044/9869 cut-off events. [2024-06-28 00:44:26,769 INFO L125 PetriNetUnfolderBase]: For 851014/851014 co-relation queries the response was YES. [2024-06-28 00:44:26,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94544 conditions, 9869 events. 6044/9869 cut-off events. For 851014/851014 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 69269 event pairs, 2669 based on Foata normal form. 2/9868 useless extension candidates. Maximal degree in co-relation 94387. Up to 9594 conditions per place. [2024-06-28 00:44:26,905 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 540 selfloop transitions, 16 changer transitions 0/561 dead transitions. [2024-06-28 00:44:26,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 561 transitions, 12184 flow [2024-06-28 00:44:26,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:44:26,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:44:26,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2024-06-28 00:44:26,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36054421768707484 [2024-06-28 00:44:26,906 INFO L175 Difference]: Start difference. First operand has 325 places, 548 transitions, 11004 flow. Second operand 7 states and 106 transitions. [2024-06-28 00:44:26,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 561 transitions, 12184 flow [2024-06-28 00:44:29,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 561 transitions, 11957 flow, removed 107 selfloop flow, removed 2 redundant places. [2024-06-28 00:44:29,681 INFO L231 Difference]: Finished difference. Result has 330 places, 550 transitions, 10856 flow [2024-06-28 00:44:29,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10777, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10856, PETRI_PLACES=330, PETRI_TRANSITIONS=550} [2024-06-28 00:44:29,682 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-28 00:44:29,682 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 550 transitions, 10856 flow [2024-06-28 00:44:29,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:44:29,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:44:29,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:44:29,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 00:44:29,682 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:44:29,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:44:29,682 INFO L85 PathProgramCache]: Analyzing trace with hash 87090071, now seen corresponding path program 1 times [2024-06-28 00:44:29,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:44:29,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093361933] [2024-06-28 00:44:29,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:44:29,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:44:29,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:44:33,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:44:33,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:44:33,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093361933] [2024-06-28 00:44:33,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093361933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:44:33,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:44:33,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:44:33,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367910023] [2024-06-28 00:44:33,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:44:33,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:44:33,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:44:33,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:44:33,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:44:33,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:44:33,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 550 transitions, 10856 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:44:33,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:44:33,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:44:33,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:44:36,419 INFO L124 PetriNetUnfolderBase]: 6081/9906 cut-off events. [2024-06-28 00:44:36,420 INFO L125 PetriNetUnfolderBase]: For 860433/860433 co-relation queries the response was YES. [2024-06-28 00:44:36,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95315 conditions, 9906 events. 6081/9906 cut-off events. For 860433/860433 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 69110 event pairs, 1475 based on Foata normal form. 2/9905 useless extension candidates. Maximal degree in co-relation 95156. Up to 9437 conditions per place. [2024-06-28 00:44:36,565 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 487 selfloop transitions, 103 changer transitions 0/595 dead transitions. [2024-06-28 00:44:36,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 595 transitions, 12638 flow [2024-06-28 00:44:36,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:44:36,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:44:36,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-28 00:44:36,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-28 00:44:36,567 INFO L175 Difference]: Start difference. First operand has 330 places, 550 transitions, 10856 flow. Second operand 9 states and 161 transitions. [2024-06-28 00:44:36,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 595 transitions, 12638 flow [2024-06-28 00:44:39,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 595 transitions, 12549 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-28 00:44:39,856 INFO L231 Difference]: Finished difference. Result has 335 places, 564 transitions, 11391 flow [2024-06-28 00:44:39,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10767, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11391, PETRI_PLACES=335, PETRI_TRANSITIONS=564} [2024-06-28 00:44:39,857 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-28 00:44:39,857 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 564 transitions, 11391 flow [2024-06-28 00:44:39,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:44:39,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:44:39,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:44:39,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 00:44:39,857 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:44:39,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:44:39,857 INFO L85 PathProgramCache]: Analyzing trace with hash -698906055, now seen corresponding path program 2 times [2024-06-28 00:44:39,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:44:39,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560574711] [2024-06-28 00:44:39,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:44:39,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:44:39,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:44:44,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:44:44,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:44:44,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560574711] [2024-06-28 00:44:44,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560574711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:44:44,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:44:44,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:44:44,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469798276] [2024-06-28 00:44:44,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:44:44,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:44:44,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:44:44,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:44:44,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:44:44,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:44:44,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 564 transitions, 11391 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:44:44,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:44:44,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:44:44,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:44:47,327 INFO L124 PetriNetUnfolderBase]: 6078/9900 cut-off events. [2024-06-28 00:44:47,327 INFO L125 PetriNetUnfolderBase]: For 871255/871255 co-relation queries the response was YES. [2024-06-28 00:44:47,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96051 conditions, 9900 events. 6078/9900 cut-off events. For 871255/871255 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 69022 event pairs, 1471 based on Foata normal form. 2/9899 useless extension candidates. Maximal degree in co-relation 95890. Up to 9416 conditions per place. [2024-06-28 00:44:47,461 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 485 selfloop transitions, 106 changer transitions 0/596 dead transitions. [2024-06-28 00:44:47,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 596 transitions, 12963 flow [2024-06-28 00:44:47,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:44:47,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:44:47,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-28 00:44:47,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-28 00:44:47,463 INFO L175 Difference]: Start difference. First operand has 335 places, 564 transitions, 11391 flow. Second operand 8 states and 146 transitions. [2024-06-28 00:44:47,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 596 transitions, 12963 flow [2024-06-28 00:44:50,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 596 transitions, 12628 flow, removed 69 selfloop flow, removed 6 redundant places. [2024-06-28 00:44:50,249 INFO L231 Difference]: Finished difference. Result has 337 places, 568 transitions, 11438 flow [2024-06-28 00:44:50,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11056, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11438, PETRI_PLACES=337, PETRI_TRANSITIONS=568} [2024-06-28 00:44:50,249 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 294 predicate places. [2024-06-28 00:44:50,250 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 568 transitions, 11438 flow [2024-06-28 00:44:50,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:44:50,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:44:50,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:44:50,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 00:44:50,250 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:44:50,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:44:50,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1051172747, now seen corresponding path program 3 times [2024-06-28 00:44:50,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:44:50,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343058665] [2024-06-28 00:44:50,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:44:50,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:44:50,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:44:53,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:44:53,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:44:53,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343058665] [2024-06-28 00:44:53,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343058665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:44:53,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:44:53,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:44:53,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726498773] [2024-06-28 00:44:53,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:44:53,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:44:53,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:44:53,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:44:53,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:44:53,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:44:53,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 568 transitions, 11438 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:44:53,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:44:53,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:44:53,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:44:56,945 INFO L124 PetriNetUnfolderBase]: 6051/9873 cut-off events. [2024-06-28 00:44:56,945 INFO L125 PetriNetUnfolderBase]: For 877560/877560 co-relation queries the response was YES. [2024-06-28 00:44:57,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95653 conditions, 9873 events. 6051/9873 cut-off events. For 877560/877560 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 69034 event pairs, 1845 based on Foata normal form. 1/9872 useless extension candidates. Maximal degree in co-relation 95491. Up to 9495 conditions per place. [2024-06-28 00:44:57,092 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 538 selfloop transitions, 58 changer transitions 0/601 dead transitions. [2024-06-28 00:44:57,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 601 transitions, 12729 flow [2024-06-28 00:44:57,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:44:57,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:44:57,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-28 00:44:57,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-28 00:44:57,093 INFO L175 Difference]: Start difference. First operand has 337 places, 568 transitions, 11438 flow. Second operand 8 states and 147 transitions. [2024-06-28 00:44:57,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 601 transitions, 12729 flow [2024-06-28 00:44:59,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 601 transitions, 12391 flow, removed 72 selfloop flow, removed 6 redundant places. [2024-06-28 00:44:59,910 INFO L231 Difference]: Finished difference. Result has 339 places, 568 transitions, 11247 flow [2024-06-28 00:44:59,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11100, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11247, PETRI_PLACES=339, PETRI_TRANSITIONS=568} [2024-06-28 00:44:59,911 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 296 predicate places. [2024-06-28 00:44:59,911 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 568 transitions, 11247 flow [2024-06-28 00:44:59,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:44:59,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:44:59,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:44:59,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 00:44:59,912 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)] === [2024-06-28 00:44:59,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:44:59,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1669558645, now seen corresponding path program 4 times [2024-06-28 00:44:59,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:44:59,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678663841] [2024-06-28 00:44:59,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:44:59,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:44:59,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:45:03,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:45:03,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:45:03,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678663841] [2024-06-28 00:45:03,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678663841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:45:03,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:45:03,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:45:03,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319452257] [2024-06-28 00:45:03,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:45:03,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:45:03,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:45:03,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:45:03,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:45:03,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:45:03,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 568 transitions, 11247 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:45:03,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:45:03,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:45:03,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:45:06,419 INFO L124 PetriNetUnfolderBase]: 6071/9880 cut-off events. [2024-06-28 00:45:06,419 INFO L125 PetriNetUnfolderBase]: For 886963/886963 co-relation queries the response was YES. [2024-06-28 00:45:06,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95688 conditions, 9880 events. 6071/9880 cut-off events. For 886963/886963 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 68571 event pairs, 1458 based on Foata normal form. 2/9872 useless extension candidates. Maximal degree in co-relation 95525. Up to 9438 conditions per place. [2024-06-28 00:45:06,562 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 504 selfloop transitions, 87 changer transitions 0/596 dead transitions. [2024-06-28 00:45:06,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 596 transitions, 12721 flow [2024-06-28 00:45:06,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:45:06,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:45:06,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-28 00:45:06,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 00:45:06,563 INFO L175 Difference]: Start difference. First operand has 339 places, 568 transitions, 11247 flow. Second operand 8 states and 136 transitions. [2024-06-28 00:45:06,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 596 transitions, 12721 flow [2024-06-28 00:45:09,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 596 transitions, 12641 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 00:45:09,342 INFO L231 Difference]: Finished difference. Result has 342 places, 576 transitions, 11602 flow [2024-06-28 00:45:09,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11167, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11602, PETRI_PLACES=342, PETRI_TRANSITIONS=576} [2024-06-28 00:45:09,342 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 299 predicate places. [2024-06-28 00:45:09,342 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 576 transitions, 11602 flow [2024-06-28 00:45:09,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:45:09,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:45:09,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:45:09,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 00:45:09,343 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:45:09,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:45:09,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1510087835, now seen corresponding path program 5 times [2024-06-28 00:45:09,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:45:09,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868533489] [2024-06-28 00:45:09,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:45:09,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:45:09,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:45:12,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:45:12,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:45:12,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868533489] [2024-06-28 00:45:12,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868533489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:45:12,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:45:12,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:45:12,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149348252] [2024-06-28 00:45:12,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:45:12,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:45:12,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:45:12,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:45:12,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:45:12,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:45:12,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 576 transitions, 11602 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:45:12,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:45:12,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:45:12,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:45:16,166 INFO L124 PetriNetUnfolderBase]: 6076/9881 cut-off events. [2024-06-28 00:45:16,166 INFO L125 PetriNetUnfolderBase]: For 908981/908981 co-relation queries the response was YES. [2024-06-28 00:45:16,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96832 conditions, 9881 events. 6076/9881 cut-off events. For 908981/908981 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 68480 event pairs, 1471 based on Foata normal form. 1/9865 useless extension candidates. Maximal degree in co-relation 96668. Up to 9366 conditions per place. [2024-06-28 00:45:16,296 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 475 selfloop transitions, 119 changer transitions 0/599 dead transitions. [2024-06-28 00:45:16,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 599 transitions, 13206 flow [2024-06-28 00:45:16,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:45:16,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:45:16,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-28 00:45:16,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-28 00:45:16,298 INFO L175 Difference]: Start difference. First operand has 342 places, 576 transitions, 11602 flow. Second operand 8 states and 134 transitions. [2024-06-28 00:45:16,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 599 transitions, 13206 flow [2024-06-28 00:45:19,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 599 transitions, 12857 flow, removed 94 selfloop flow, removed 6 redundant places. [2024-06-28 00:45:19,023 INFO L231 Difference]: Finished difference. Result has 344 places, 579 transitions, 11683 flow [2024-06-28 00:45:19,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11253, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11683, PETRI_PLACES=344, PETRI_TRANSITIONS=579} [2024-06-28 00:45:19,024 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-28 00:45:19,024 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 579 transitions, 11683 flow [2024-06-28 00:45:19,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:45:19,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:45:19,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:45:19,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-28 00:45:19,024 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:45:19,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:45:19,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1510473785, now seen corresponding path program 6 times [2024-06-28 00:45:19,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:45:19,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502430017] [2024-06-28 00:45:19,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:45:19,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:45:19,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:45:23,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:45:23,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:45:23,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502430017] [2024-06-28 00:45:23,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502430017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:45:23,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:45:23,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:45:23,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737761373] [2024-06-28 00:45:23,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:45:23,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:45:23,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:45:23,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:45:23,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:45:23,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:45:23,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 579 transitions, 11683 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:45:23,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:45:23,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:45:23,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:45:26,158 INFO L124 PetriNetUnfolderBase]: 6073/9877 cut-off events. [2024-06-28 00:45:26,159 INFO L125 PetriNetUnfolderBase]: For 924477/924477 co-relation queries the response was YES. [2024-06-28 00:45:26,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96856 conditions, 9877 events. 6073/9877 cut-off events. For 924477/924477 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 68466 event pairs, 1471 based on Foata normal form. 1/9861 useless extension candidates. Maximal degree in co-relation 96691. Up to 9324 conditions per place. [2024-06-28 00:45:26,309 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 454 selfloop transitions, 139 changer transitions 0/598 dead transitions. [2024-06-28 00:45:26,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 598 transitions, 13277 flow [2024-06-28 00:45:26,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:45:26,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:45:26,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-28 00:45:26,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-28 00:45:26,311 INFO L175 Difference]: Start difference. First operand has 344 places, 579 transitions, 11683 flow. Second operand 8 states and 131 transitions. [2024-06-28 00:45:26,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 598 transitions, 13277 flow [2024-06-28 00:45:29,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 598 transitions, 12781 flow, removed 87 selfloop flow, removed 7 redundant places. [2024-06-28 00:45:29,505 INFO L231 Difference]: Finished difference. Result has 345 places, 582 transitions, 11663 flow [2024-06-28 00:45:29,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11187, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11663, PETRI_PLACES=345, PETRI_TRANSITIONS=582} [2024-06-28 00:45:29,506 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-28 00:45:29,506 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 582 transitions, 11663 flow [2024-06-28 00:45:29,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:45:29,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:45:29,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:45:29,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-28 00:45:29,513 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:45:29,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:45:29,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1964858435, now seen corresponding path program 7 times [2024-06-28 00:45:29,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:45:29,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086556567] [2024-06-28 00:45:29,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:45:29,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:45:29,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:45:32,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:45:32,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:45:32,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086556567] [2024-06-28 00:45:32,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086556567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:45:32,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:45:32,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:45:32,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424027440] [2024-06-28 00:45:32,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:45:32,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:45:32,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:45:32,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:45:32,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:45:32,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:45:32,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 582 transitions, 11663 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:45:32,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:45:32,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:45:32,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:45:35,958 INFO L124 PetriNetUnfolderBase]: 6046/9859 cut-off events. [2024-06-28 00:45:35,958 INFO L125 PetriNetUnfolderBase]: For 936456/936456 co-relation queries the response was YES. [2024-06-28 00:45:36,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96637 conditions, 9859 events. 6046/9859 cut-off events. For 936456/936456 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 68784 event pairs, 1827 based on Foata normal form. 1/9852 useless extension candidates. Maximal degree in co-relation 96471. Up to 9405 conditions per place. [2024-06-28 00:45:36,128 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 506 selfloop transitions, 92 changer transitions 0/603 dead transitions. [2024-06-28 00:45:36,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 603 transitions, 12926 flow [2024-06-28 00:45:36,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:45:36,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:45:36,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-28 00:45:36,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-28 00:45:36,130 INFO L175 Difference]: Start difference. First operand has 345 places, 582 transitions, 11663 flow. Second operand 8 states and 134 transitions. [2024-06-28 00:45:36,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 603 transitions, 12926 flow [2024-06-28 00:45:39,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 603 transitions, 12446 flow, removed 103 selfloop flow, removed 6 redundant places. [2024-06-28 00:45:39,471 INFO L231 Difference]: Finished difference. Result has 347 places, 582 transitions, 11373 flow [2024-06-28 00:45:39,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11183, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11373, PETRI_PLACES=347, PETRI_TRANSITIONS=582} [2024-06-28 00:45:39,472 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 304 predicate places. [2024-06-28 00:45:39,472 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 582 transitions, 11373 flow [2024-06-28 00:45:39,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:45:39,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:45:39,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:45:39,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-28 00:45:39,472 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:45:39,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:45:39,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1507625753, now seen corresponding path program 1 times [2024-06-28 00:45:39,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:45:39,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845503273] [2024-06-28 00:45:39,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:45:39,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:45:39,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:45:43,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:45:43,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:45:43,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845503273] [2024-06-28 00:45:43,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845503273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:45:43,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:45:43,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:45:43,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483273714] [2024-06-28 00:45:43,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:45:43,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:45:43,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:45:43,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:45:43,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:45:43,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 00:45:43,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 582 transitions, 11373 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 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) [2024-06-28 00:45:43,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:45:43,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 00:45:43,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:45:46,988 INFO L124 PetriNetUnfolderBase]: 5856/9732 cut-off events. [2024-06-28 00:45:46,989 INFO L125 PetriNetUnfolderBase]: For 1054227/1054270 co-relation queries the response was YES. [2024-06-28 00:45:47,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95069 conditions, 9732 events. 5856/9732 cut-off events. For 1054227/1054270 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 70137 event pairs, 2599 based on Foata normal form. 10/9689 useless extension candidates. Maximal degree in co-relation 94902. Up to 8363 conditions per place. [2024-06-28 00:45:47,125 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 422 selfloop transitions, 57 changer transitions 0/625 dead transitions. [2024-06-28 00:45:47,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 625 transitions, 13143 flow [2024-06-28 00:45:47,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:45:47,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:45:47,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-28 00:45:47,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-28 00:45:47,126 INFO L175 Difference]: Start difference. First operand has 347 places, 582 transitions, 11373 flow. Second operand 9 states and 163 transitions. [2024-06-28 00:45:47,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 625 transitions, 13143 flow [2024-06-28 00:45:49,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 625 transitions, 12911 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-28 00:45:49,899 INFO L231 Difference]: Finished difference. Result has 350 places, 588 transitions, 11413 flow [2024-06-28 00:45:49,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11141, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11413, PETRI_PLACES=350, PETRI_TRANSITIONS=588} [2024-06-28 00:45:49,900 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 307 predicate places. [2024-06-28 00:45:49,900 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 588 transitions, 11413 flow [2024-06-28 00:45:49,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 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) [2024-06-28 00:45:49,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:45:49,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:45:49,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-28 00:45:49,900 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:45:49,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:45:49,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1773385360, now seen corresponding path program 1 times [2024-06-28 00:45:49,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:45:49,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362019103] [2024-06-28 00:45:49,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:45:49,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:45:49,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:45:53,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:45:53,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:45:53,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362019103] [2024-06-28 00:45:53,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362019103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:45:53,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:45:53,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:45:53,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210216089] [2024-06-28 00:45:53,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:45:53,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:45:53,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:45:53,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:45:53,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:45:53,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:45:53,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 588 transitions, 11413 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:45:53,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:45:53,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:45:53,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:45:56,541 INFO L124 PetriNetUnfolderBase]: 6188/10081 cut-off events. [2024-06-28 00:45:56,542 INFO L125 PetriNetUnfolderBase]: For 1033509/1033509 co-relation queries the response was YES. [2024-06-28 00:45:56,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100459 conditions, 10081 events. 6188/10081 cut-off events. For 1033509/1033509 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 70608 event pairs, 1877 based on Foata normal form. 2/10081 useless extension candidates. Maximal degree in co-relation 100290. Up to 9648 conditions per place. [2024-06-28 00:45:56,694 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 563 selfloop transitions, 70 changer transitions 0/638 dead transitions. [2024-06-28 00:45:56,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 638 transitions, 13346 flow [2024-06-28 00:45:56,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:45:56,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:45:56,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-28 00:45:56,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-28 00:45:56,695 INFO L175 Difference]: Start difference. First operand has 350 places, 588 transitions, 11413 flow. Second operand 9 states and 167 transitions. [2024-06-28 00:45:56,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 638 transitions, 13346 flow [2024-06-28 00:45:59,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 638 transitions, 13271 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-28 00:45:59,758 INFO L231 Difference]: Finished difference. Result has 357 places, 601 transitions, 11884 flow [2024-06-28 00:45:59,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11338, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11884, PETRI_PLACES=357, PETRI_TRANSITIONS=601} [2024-06-28 00:45:59,758 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 314 predicate places. [2024-06-28 00:45:59,759 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 601 transitions, 11884 flow [2024-06-28 00:45:59,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:45:59,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:45:59,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:45:59,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-28 00:45:59,759 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:45:59,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:45:59,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1507686203, now seen corresponding path program 2 times [2024-06-28 00:45:59,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:45:59,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20077925] [2024-06-28 00:45:59,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:45:59,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:45:59,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:46:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:46:04,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:46:04,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20077925] [2024-06-28 00:46:04,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20077925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:46:04,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:46:04,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:46:04,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498145144] [2024-06-28 00:46:04,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:46:04,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:46:04,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:46:04,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:46:04,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:46:04,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:46:04,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 601 transitions, 11884 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-28 00:46:04,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:46:04,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:46:04,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:46:08,268 INFO L124 PetriNetUnfolderBase]: 6183/10074 cut-off events. [2024-06-28 00:46:08,268 INFO L125 PetriNetUnfolderBase]: For 1050982/1050982 co-relation queries the response was YES. [2024-06-28 00:46:08,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100656 conditions, 10074 events. 6183/10074 cut-off events. For 1050982/1050982 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 70788 event pairs, 2694 based on Foata normal form. 2/10073 useless extension candidates. Maximal degree in co-relation 100484. Up to 9728 conditions per place. [2024-06-28 00:46:08,405 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 577 selfloop transitions, 44 changer transitions 0/626 dead transitions. [2024-06-28 00:46:08,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 626 transitions, 13627 flow [2024-06-28 00:46:08,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:46:08,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:46:08,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-28 00:46:08,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-28 00:46:08,406 INFO L175 Difference]: Start difference. First operand has 357 places, 601 transitions, 11884 flow. Second operand 8 states and 139 transitions. [2024-06-28 00:46:08,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 626 transitions, 13627 flow [2024-06-28 00:46:11,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 626 transitions, 13421 flow, removed 85 selfloop flow, removed 3 redundant places. [2024-06-28 00:46:11,694 INFO L231 Difference]: Finished difference. Result has 362 places, 602 transitions, 11834 flow [2024-06-28 00:46:11,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11678, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11834, PETRI_PLACES=362, PETRI_TRANSITIONS=602} [2024-06-28 00:46:11,695 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-28 00:46:11,695 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 602 transitions, 11834 flow [2024-06-28 00:46:11,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-28 00:46:11,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:46:11,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:46:11,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-28 00:46:11,695 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:46:11,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:46:11,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1507686327, now seen corresponding path program 1 times [2024-06-28 00:46:11,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:46:11,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460547061] [2024-06-28 00:46:11,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:46:11,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:46:11,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:46:17,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:46:17,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:46:17,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460547061] [2024-06-28 00:46:17,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460547061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:46:17,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:46:17,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:46:17,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525126518] [2024-06-28 00:46:17,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:46:17,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:46:17,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:46:17,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:46:17,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:46:17,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:46:17,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 602 transitions, 11834 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:46:17,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:46:17,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:46:17,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:46:20,983 INFO L124 PetriNetUnfolderBase]: 6185/10077 cut-off events. [2024-06-28 00:46:20,984 INFO L125 PetriNetUnfolderBase]: For 1055971/1055971 co-relation queries the response was YES. [2024-06-28 00:46:21,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100638 conditions, 10077 events. 6185/10077 cut-off events. For 1055971/1055971 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 70793 event pairs, 2694 based on Foata normal form. 2/10076 useless extension candidates. Maximal degree in co-relation 100463. Up to 9711 conditions per place. [2024-06-28 00:46:21,121 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 570 selfloop transitions, 54 changer transitions 0/629 dead transitions. [2024-06-28 00:46:21,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 629 transitions, 13591 flow [2024-06-28 00:46:21,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:46:21,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:46:21,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-28 00:46:21,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-28 00:46:21,123 INFO L175 Difference]: Start difference. First operand has 362 places, 602 transitions, 11834 flow. Second operand 8 states and 140 transitions. [2024-06-28 00:46:21,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 629 transitions, 13591 flow [2024-06-28 00:46:24,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 629 transitions, 13460 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-28 00:46:24,273 INFO L231 Difference]: Finished difference. Result has 365 places, 605 transitions, 11876 flow [2024-06-28 00:46:24,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11703, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11876, PETRI_PLACES=365, PETRI_TRANSITIONS=605} [2024-06-28 00:46:24,274 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-28 00:46:24,274 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 605 transitions, 11876 flow [2024-06-28 00:46:24,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:46:24,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:46:24,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:46:24,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-28 00:46:24,275 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:46:24,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:46:24,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1510487487, now seen corresponding path program 2 times [2024-06-28 00:46:24,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:46:24,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084121452] [2024-06-28 00:46:24,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:46:24,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:46:24,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:46:30,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:46:30,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:46:30,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084121452] [2024-06-28 00:46:30,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084121452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:46:30,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:46:30,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:46:30,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210443047] [2024-06-28 00:46:30,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:46:30,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:46:30,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:46:30,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:46:30,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:46:30,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:46:30,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 605 transitions, 11876 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:46:30,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:46:30,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:46:30,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:46:34,307 INFO L124 PetriNetUnfolderBase]: 6195/10091 cut-off events. [2024-06-28 00:46:34,307 INFO L125 PetriNetUnfolderBase]: For 1074149/1074149 co-relation queries the response was YES. [2024-06-28 00:46:34,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100881 conditions, 10091 events. 6195/10091 cut-off events. For 1074149/1074149 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 70850 event pairs, 2682 based on Foata normal form. 2/10090 useless extension candidates. Maximal degree in co-relation 100705. Up to 9765 conditions per place. [2024-06-28 00:46:34,450 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 587 selfloop transitions, 35 changer transitions 0/627 dead transitions. [2024-06-28 00:46:34,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 627 transitions, 13434 flow [2024-06-28 00:46:34,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:46:34,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:46:34,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-28 00:46:34,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-28 00:46:34,452 INFO L175 Difference]: Start difference. First operand has 365 places, 605 transitions, 11876 flow. Second operand 9 states and 140 transitions. [2024-06-28 00:46:34,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 627 transitions, 13434 flow [2024-06-28 00:46:37,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 627 transitions, 13282 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-28 00:46:37,695 INFO L231 Difference]: Finished difference. Result has 368 places, 608 transitions, 11868 flow [2024-06-28 00:46:37,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11724, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11868, PETRI_PLACES=368, PETRI_TRANSITIONS=608} [2024-06-28 00:46:37,696 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-28 00:46:37,696 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 608 transitions, 11868 flow [2024-06-28 00:46:37,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:46:37,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:46:37,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:46:37,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-28 00:46:37,696 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:46:37,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:46:37,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1063746279, now seen corresponding path program 3 times [2024-06-28 00:46:37,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:46:37,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181674307] [2024-06-28 00:46:37,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:46:37,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:46:37,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:46:43,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:46:43,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:46:43,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181674307] [2024-06-28 00:46:43,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181674307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:46:43,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:46:43,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:46:43,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887406572] [2024-06-28 00:46:43,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:46:43,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:46:43,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:46:43,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:46:43,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:46:43,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:46:43,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 608 transitions, 11868 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-28 00:46:43,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:46:43,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:46:43,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:46:46,774 INFO L124 PetriNetUnfolderBase]: 6190/10084 cut-off events. [2024-06-28 00:46:46,775 INFO L125 PetriNetUnfolderBase]: For 1086787/1086787 co-relation queries the response was YES. [2024-06-28 00:46:46,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101360 conditions, 10084 events. 6190/10084 cut-off events. For 1086787/1086787 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 70782 event pairs, 2696 based on Foata normal form. 2/10083 useless extension candidates. Maximal degree in co-relation 101183. Up to 9770 conditions per place. [2024-06-28 00:46:46,916 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 593 selfloop transitions, 30 changer transitions 0/628 dead transitions. [2024-06-28 00:46:46,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 628 transitions, 13464 flow [2024-06-28 00:46:46,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:46:46,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:46:46,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-28 00:46:46,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-28 00:46:46,917 INFO L175 Difference]: Start difference. First operand has 368 places, 608 transitions, 11868 flow. Second operand 8 states and 130 transitions. [2024-06-28 00:46:46,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 628 transitions, 13464 flow [2024-06-28 00:46:50,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 628 transitions, 13350 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-28 00:46:50,476 INFO L231 Difference]: Finished difference. Result has 369 places, 610 transitions, 11933 flow [2024-06-28 00:46:50,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11754, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11933, PETRI_PLACES=369, PETRI_TRANSITIONS=610} [2024-06-28 00:46:50,476 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 326 predicate places. [2024-06-28 00:46:50,477 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 610 transitions, 11933 flow [2024-06-28 00:46:50,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-28 00:46:50,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:46:50,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:46:50,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-28 00:46:50,477 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:46:50,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:46:50,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1510482837, now seen corresponding path program 3 times [2024-06-28 00:46:50,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:46:50,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294699618] [2024-06-28 00:46:50,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:46:50,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:46:50,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:46:55,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:46:55,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:46:55,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294699618] [2024-06-28 00:46:55,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294699618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:46:55,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:46:55,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:46:55,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242856339] [2024-06-28 00:46:55,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:46:55,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:46:55,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:46:55,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:46:55,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:46:55,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:46:55,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 610 transitions, 11933 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:46:55,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:46:55,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:46:55,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:46:59,654 INFO L124 PetriNetUnfolderBase]: 6184/10080 cut-off events. [2024-06-28 00:46:59,655 INFO L125 PetriNetUnfolderBase]: For 1094440/1094440 co-relation queries the response was YES. [2024-06-28 00:46:59,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101258 conditions, 10080 events. 6184/10080 cut-off events. For 1094440/1094440 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 70869 event pairs, 2678 based on Foata normal form. 2/10079 useless extension candidates. Maximal degree in co-relation 101081. Up to 9741 conditions per place. [2024-06-28 00:47:00,051 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 588 selfloop transitions, 40 changer transitions 0/633 dead transitions. [2024-06-28 00:47:00,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 633 transitions, 13523 flow [2024-06-28 00:47:00,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:47:00,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:47:00,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 00:47:00,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-28 00:47:00,053 INFO L175 Difference]: Start difference. First operand has 369 places, 610 transitions, 11933 flow. Second operand 8 states and 135 transitions. [2024-06-28 00:47:00,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 633 transitions, 13523 flow [2024-06-28 00:47:03,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 633 transitions, 13360 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-28 00:47:03,653 INFO L231 Difference]: Finished difference. Result has 371 places, 613 transitions, 11932 flow [2024-06-28 00:47:03,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11770, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11932, PETRI_PLACES=371, PETRI_TRANSITIONS=613} [2024-06-28 00:47:03,654 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-28 00:47:03,654 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 613 transitions, 11932 flow [2024-06-28 00:47:03,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:47:03,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:47:03,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:47:03,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-28 00:47:03,654 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:47:03,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:47:03,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1964872323, now seen corresponding path program 1 times [2024-06-28 00:47:03,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:47:03,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141317791] [2024-06-28 00:47:03,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:47:03,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:47:03,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:47:08,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:47:08,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:47:08,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141317791] [2024-06-28 00:47:08,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141317791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:47:08,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:47:08,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:47:08,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854067982] [2024-06-28 00:47:08,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:47:08,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:47:08,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:47:08,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:47:08,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:47:08,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:47:08,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 613 transitions, 11932 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:47:08,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:47:08,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:47:08,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:47:12,293 INFO L124 PetriNetUnfolderBase]: 6178/10072 cut-off events. [2024-06-28 00:47:12,294 INFO L125 PetriNetUnfolderBase]: For 1104299/1104299 co-relation queries the response was YES. [2024-06-28 00:47:12,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101686 conditions, 10072 events. 6178/10072 cut-off events. For 1104299/1104299 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 70800 event pairs, 2680 based on Foata normal form. 2/10071 useless extension candidates. Maximal degree in co-relation 101508. Up to 9761 conditions per place. [2024-06-28 00:47:12,677 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 595 selfloop transitions, 29 changer transitions 0/629 dead transitions. [2024-06-28 00:47:12,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 629 transitions, 13230 flow [2024-06-28 00:47:12,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:47:12,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:47:12,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-28 00:47:12,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3544973544973545 [2024-06-28 00:47:12,679 INFO L175 Difference]: Start difference. First operand has 371 places, 613 transitions, 11932 flow. Second operand 9 states and 134 transitions. [2024-06-28 00:47:12,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 629 transitions, 13230 flow [2024-06-28 00:47:16,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 629 transitions, 12998 flow, removed 78 selfloop flow, removed 6 redundant places. [2024-06-28 00:47:16,244 INFO L231 Difference]: Finished difference. Result has 374 places, 613 transitions, 11768 flow [2024-06-28 00:47:16,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11700, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11768, PETRI_PLACES=374, PETRI_TRANSITIONS=613} [2024-06-28 00:47:16,245 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 331 predicate places. [2024-06-28 00:47:16,245 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 613 transitions, 11768 flow [2024-06-28 00:47:16,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:47:16,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:47:16,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:47:16,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-28 00:47:16,245 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:47:16,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:47:16,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1798084217, now seen corresponding path program 2 times [2024-06-28 00:47:16,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:47:16,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982210023] [2024-06-28 00:47:16,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:47:16,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:47:16,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:47:20,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:47:20,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:47:20,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982210023] [2024-06-28 00:47:20,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982210023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:47:20,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:47:20,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:47:20,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816691284] [2024-06-28 00:47:20,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:47:20,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:47:20,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:47:20,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:47:20,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:47:20,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:47:20,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 613 transitions, 11768 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:47:20,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:47:20,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:47:20,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:47:24,520 INFO L124 PetriNetUnfolderBase]: 6334/10292 cut-off events. [2024-06-28 00:47:24,520 INFO L125 PetriNetUnfolderBase]: For 1253044/1253044 co-relation queries the response was YES. [2024-06-28 00:47:24,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107483 conditions, 10292 events. 6334/10292 cut-off events. For 1253044/1253044 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 72233 event pairs, 2519 based on Foata normal form. 1/10290 useless extension candidates. Maximal degree in co-relation 107304. Up to 9408 conditions per place. [2024-06-28 00:47:24,665 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 479 selfloop transitions, 166 changer transitions 0/650 dead transitions. [2024-06-28 00:47:24,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 650 transitions, 13970 flow [2024-06-28 00:47:24,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:47:24,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:47:24,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-28 00:47:24,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-28 00:47:24,667 INFO L175 Difference]: Start difference. First operand has 374 places, 613 transitions, 11768 flow. Second operand 8 states and 146 transitions. [2024-06-28 00:47:24,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 650 transitions, 13970 flow [2024-06-28 00:47:28,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 650 transitions, 13804 flow, removed 37 selfloop flow, removed 9 redundant places. [2024-06-28 00:47:28,280 INFO L231 Difference]: Finished difference. Result has 374 places, 624 transitions, 12535 flow [2024-06-28 00:47:28,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11602, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12535, PETRI_PLACES=374, PETRI_TRANSITIONS=624} [2024-06-28 00:47:28,281 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 331 predicate places. [2024-06-28 00:47:28,281 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 624 transitions, 12535 flow [2024-06-28 00:47:28,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:47:28,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:47:28,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:47:28,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-28 00:47:28,281 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:47:28,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:47:28,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1235817747, now seen corresponding path program 1 times [2024-06-28 00:47:28,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:47:28,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939985248] [2024-06-28 00:47:28,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:47:28,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:47:28,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:47:32,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:47:32,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:47:32,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939985248] [2024-06-28 00:47:32,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939985248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:47:32,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:47:32,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:47:32,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049381206] [2024-06-28 00:47:32,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:47:32,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:47:32,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:47:32,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:47:32,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:47:32,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:47:32,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 624 transitions, 12535 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:47:32,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:47:32,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:47:32,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:47:36,747 INFO L124 PetriNetUnfolderBase]: 6348/10315 cut-off events. [2024-06-28 00:47:36,747 INFO L125 PetriNetUnfolderBase]: For 1272995/1272995 co-relation queries the response was YES. [2024-06-28 00:47:36,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110062 conditions, 10315 events. 6348/10315 cut-off events. For 1272995/1272995 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 72133 event pairs, 1923 based on Foata normal form. 1/10314 useless extension candidates. Maximal degree in co-relation 109881. Up to 9934 conditions per place. [2024-06-28 00:47:36,896 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 599 selfloop transitions, 63 changer transitions 0/667 dead transitions. [2024-06-28 00:47:36,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 667 transitions, 14323 flow [2024-06-28 00:47:36,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:47:36,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:47:36,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-28 00:47:36,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2024-06-28 00:47:36,898 INFO L175 Difference]: Start difference. First operand has 374 places, 624 transitions, 12535 flow. Second operand 10 states and 173 transitions. [2024-06-28 00:47:36,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 667 transitions, 14323 flow [2024-06-28 00:47:41,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 667 transitions, 14178 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-28 00:47:41,203 INFO L231 Difference]: Finished difference. Result has 380 places, 631 transitions, 12713 flow [2024-06-28 00:47:41,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12390, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12713, PETRI_PLACES=380, PETRI_TRANSITIONS=631} [2024-06-28 00:47:41,203 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 337 predicate places. [2024-06-28 00:47:41,204 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 631 transitions, 12713 flow [2024-06-28 00:47:41,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:47:41,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:47:41,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:47:41,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-28 00:47:41,204 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:47:41,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:47:41,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1105224885, now seen corresponding path program 2 times [2024-06-28 00:47:41,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:47:41,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665847335] [2024-06-28 00:47:41,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:47:41,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:47:41,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:47:44,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:47:44,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:47:44,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665847335] [2024-06-28 00:47:44,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665847335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:47:44,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:47:44,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:47:44,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419929369] [2024-06-28 00:47:44,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:47:44,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:47:44,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:47:44,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:47:44,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:47:44,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:47:44,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 631 transitions, 12713 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-28 00:47:44,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:47:44,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:47:44,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:47:48,493 INFO L124 PetriNetUnfolderBase]: 6330/10281 cut-off events. [2024-06-28 00:47:48,493 INFO L125 PetriNetUnfolderBase]: For 1277671/1277671 co-relation queries the response was YES. [2024-06-28 00:47:48,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109527 conditions, 10281 events. 6330/10281 cut-off events. For 1277671/1277671 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 71836 event pairs, 1921 based on Foata normal form. 2/10281 useless extension candidates. Maximal degree in co-relation 109343. Up to 9899 conditions per place. [2024-06-28 00:47:48,633 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 595 selfloop transitions, 68 changer transitions 0/668 dead transitions. [2024-06-28 00:47:48,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 668 transitions, 14459 flow [2024-06-28 00:47:48,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:47:48,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:47:48,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-28 00:47:48,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-28 00:47:48,635 INFO L175 Difference]: Start difference. First operand has 380 places, 631 transitions, 12713 flow. Second operand 9 states and 159 transitions. [2024-06-28 00:47:48,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 668 transitions, 14459 flow [2024-06-28 00:47:52,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 668 transitions, 14277 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-28 00:47:52,832 INFO L231 Difference]: Finished difference. Result has 385 places, 635 transitions, 12812 flow [2024-06-28 00:47:52,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12531, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12812, PETRI_PLACES=385, PETRI_TRANSITIONS=635} [2024-06-28 00:47:52,833 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 342 predicate places. [2024-06-28 00:47:52,833 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 635 transitions, 12812 flow [2024-06-28 00:47:52,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-28 00:47:52,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:47:52,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:47:52,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-28 00:47:52,833 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:47:52,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:47:52,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1105315250, now seen corresponding path program 2 times [2024-06-28 00:47:52,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:47:52,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099150367] [2024-06-28 00:47:52,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:47:52,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:47:52,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:47:57,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:47:57,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:47:57,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099150367] [2024-06-28 00:47:57,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099150367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:47:57,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:47:57,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:47:57,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49085920] [2024-06-28 00:47:57,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:47:57,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:47:57,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:47:57,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:47:57,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:47:57,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:47:57,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 635 transitions, 12812 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:47:57,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:47:57,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:47:57,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:48:01,323 INFO L124 PetriNetUnfolderBase]: 6436/10422 cut-off events. [2024-06-28 00:48:01,323 INFO L125 PetriNetUnfolderBase]: For 1372480/1372480 co-relation queries the response was YES. [2024-06-28 00:48:01,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113022 conditions, 10422 events. 6436/10422 cut-off events. For 1372480/1372480 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 72684 event pairs, 1519 based on Foata normal form. 6/10425 useless extension candidates. Maximal degree in co-relation 112837. Up to 9646 conditions per place. [2024-06-28 00:48:01,469 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 535 selfloop transitions, 165 changer transitions 0/705 dead transitions. [2024-06-28 00:48:01,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 705 transitions, 16028 flow [2024-06-28 00:48:01,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:48:01,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:48:01,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-28 00:48:01,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41125541125541126 [2024-06-28 00:48:01,470 INFO L175 Difference]: Start difference. First operand has 385 places, 635 transitions, 12812 flow. Second operand 11 states and 190 transitions. [2024-06-28 00:48:01,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 705 transitions, 16028 flow [2024-06-28 00:48:06,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 705 transitions, 15806 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-28 00:48:06,180 INFO L231 Difference]: Finished difference. Result has 394 places, 666 transitions, 14135 flow [2024-06-28 00:48:06,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12596, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14135, PETRI_PLACES=394, PETRI_TRANSITIONS=666} [2024-06-28 00:48:06,180 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-28 00:48:06,180 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 666 transitions, 14135 flow [2024-06-28 00:48:06,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:48:06,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:48:06,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:48:06,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-28 00:48:06,181 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:48:06,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:48:06,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1105315095, now seen corresponding path program 3 times [2024-06-28 00:48:06,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:48:06,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35981176] [2024-06-28 00:48:06,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:48:06,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:48:06,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:48:11,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:48:11,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:48:11,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35981176] [2024-06-28 00:48:11,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35981176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:48:11,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:48:11,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:48:11,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403328865] [2024-06-28 00:48:11,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:48:11,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:48:11,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:48:11,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:48:11,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:48:11,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:48:11,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 666 transitions, 14135 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-28 00:48:11,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:48:11,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:48:11,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:48:14,701 INFO L124 PetriNetUnfolderBase]: 6426/10401 cut-off events. [2024-06-28 00:48:14,701 INFO L125 PetriNetUnfolderBase]: For 1385684/1385684 co-relation queries the response was YES. [2024-06-28 00:48:14,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114716 conditions, 10401 events. 6426/10401 cut-off events. For 1385684/1385684 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 72486 event pairs, 1519 based on Foata normal form. 2/10401 useless extension candidates. Maximal degree in co-relation 114526. Up to 9884 conditions per place. [2024-06-28 00:48:15,166 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 578 selfloop transitions, 114 changer transitions 0/697 dead transitions. [2024-06-28 00:48:15,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 697 transitions, 15684 flow [2024-06-28 00:48:15,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:48:15,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:48:15,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-28 00:48:15,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-28 00:48:15,170 INFO L175 Difference]: Start difference. First operand has 394 places, 666 transitions, 14135 flow. Second operand 9 states and 158 transitions. [2024-06-28 00:48:15,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 697 transitions, 15684 flow [2024-06-28 00:48:19,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 697 transitions, 15273 flow, removed 177 selfloop flow, removed 3 redundant places. [2024-06-28 00:48:19,499 INFO L231 Difference]: Finished difference. Result has 400 places, 669 transitions, 14046 flow [2024-06-28 00:48:19,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13724, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14046, PETRI_PLACES=400, PETRI_TRANSITIONS=669} [2024-06-28 00:48:19,502 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-28 00:48:19,502 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 669 transitions, 14046 flow [2024-06-28 00:48:19,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-28 00:48:19,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:48:19,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:48:19,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-28 00:48:19,502 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:48:19,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:48:19,502 INFO L85 PathProgramCache]: Analyzing trace with hash 2101523889, now seen corresponding path program 4 times [2024-06-28 00:48:19,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:48:19,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654024243] [2024-06-28 00:48:19,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:48:19,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:48:19,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:48:22,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:48:22,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:48:22,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654024243] [2024-06-28 00:48:22,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654024243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:48:22,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:48:22,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:48:22,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769593432] [2024-06-28 00:48:22,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:48:22,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:48:22,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:48:22,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:48:22,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:48:22,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:48:22,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 669 transitions, 14046 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-28 00:48:22,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:48:22,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:48:22,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:48:27,180 INFO L124 PetriNetUnfolderBase]: 6411/10394 cut-off events. [2024-06-28 00:48:27,180 INFO L125 PetriNetUnfolderBase]: For 1386899/1386899 co-relation queries the response was YES. [2024-06-28 00:48:27,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113981 conditions, 10394 events. 6411/10394 cut-off events. For 1386899/1386899 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 72595 event pairs, 1905 based on Foata normal form. 1/10393 useless extension candidates. Maximal degree in co-relation 113789. Up to 10012 conditions per place. [2024-06-28 00:48:27,325 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 638 selfloop transitions, 69 changer transitions 0/712 dead transitions. [2024-06-28 00:48:27,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 712 transitions, 15971 flow [2024-06-28 00:48:27,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:48:27,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:48:27,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-28 00:48:27,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-28 00:48:27,327 INFO L175 Difference]: Start difference. First operand has 400 places, 669 transitions, 14046 flow. Second operand 10 states and 166 transitions. [2024-06-28 00:48:27,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 712 transitions, 15971 flow [2024-06-28 00:48:31,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 712 transitions, 15602 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-28 00:48:31,621 INFO L231 Difference]: Finished difference. Result has 404 places, 681 transitions, 14298 flow [2024-06-28 00:48:31,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13689, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14298, PETRI_PLACES=404, PETRI_TRANSITIONS=681} [2024-06-28 00:48:31,621 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-28 00:48:31,621 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 681 transitions, 14298 flow [2024-06-28 00:48:31,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-28 00:48:31,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:48:31,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:48:31,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-28 00:48:31,622 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:48:31,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:48:31,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1253132240, now seen corresponding path program 3 times [2024-06-28 00:48:31,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:48:31,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739743821] [2024-06-28 00:48:31,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:48:31,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:48:31,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat